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tar zvxf jdk-8u181-linux-x64.tar.gz -C /usr/local/
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#!/bin/bash
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if [ "x" == "x${JAVA_HOME}" ]; then
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    export JAVA_HOME=/usr/local/jdk1.8.0_181
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    export PATH=$JAVA_HOME/bin:$PATH
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fi
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<node CREATED="1533566096850" FOLDED="true" ID="ID_936138796" MODIFIED="1534858407454" TEXT="代码">
<node CREATED="1533566101222" FOLDED="true" ID="ID_1564720180" MODIFIED="1534858407454" TEXT="文件01">
<node CREATED="1533601877639" FOLDED="true" ID="ID_312067491" MODIFIED="1534858407453" TEXT="文件名">
<node CREATED="1533566128364" ID="ID_667444257" MODIFIED="1533566133090" TEXT="HelloWorld.java"/>
</node>
<node CREATED="1533601884745" FOLDED="true" ID="ID_396242128" MODIFIED="1534858407454" TEXT="文件内容">
<node CREATED="1533566110956" ID="ID_1131654117" MODIFIED="1533566124603" TEXT="public class HelloWorld {
 public static void main(String[] args) {
 System.out.println("Hello World");
 }
}"/>
</node>
</node>
</node>
<node CREATED="1533566135164" FOLDED="true" ID="ID_1145736921" MODIFIED="1534858407455" TEXT="编译&运行">
<node CREATED="1533566142646" ID="ID_271107185" MODIFIED="1533566153110" TEXT="javac HelloWorld.java"/>
<node CREATED="1533566153455" ID="ID_810179396" MODIFIED="1533566160170" TEXT="java HelloWorld"/>
</node>
</node>
<node CREATED="1533602067200" FOLDED="true" ID="ID_1410633158" MODIFIED="1534858407482" TEXT="第一个窗口程序">
<node CREATED="1533566096850" FOLDED="true" ID="ID_1709165341" MODIFIED="1534858407482" TEXT="代码">
<node CREATED="1533566101222" FOLDED="true" ID="ID_1346604399" MODIFIED="1534858407456" TEXT="文件01">
<node CREATED="1533601877639" FOLDED="true" ID="ID_1050489780" MODIFIED="1534858407455" TEXT="文件名">
<node CREATED="1533566128364" ID="ID_1470176321" MODIFIED="1533602096547" TEXT="ImageView.java"/>
</node>
<node CREATED="1533601884745" FOLDED="true" ID="ID_795769879" MODIFIED="1534858407456" TEXT="文件内容">
<node CREATED="1533566110956" ID="ID_619605756" MODIFIED="1533602192437" TEXT="
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;

import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;

public class ImageViewer {
 public static void main(String[] args) {
 ImageViewerFrame frame = new ImageViewerFrame();
 frame.setTitle("ImageViewer");
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 frame.setVisible(true);
 }
}

class ImageViewerFrame extends JFrame {

 private static final int DEFAULT_WIDTH = 300;
 private static final int DEFAULT_HEIGHT = 400;

 public ImageViewerFrame() {
 setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

 JLabel label = new JLabel();
 add(label);

 JFileChooser chooser = new JFileChooser();
 chooser.setCurrentDirectory(new File("."));
 
 JMenuBar menuBar = new JMenuBar();
 setJMenuBar(menuBar);
 
 JMenu menu = new JMenu("File");
 menuBar.add(menu);
 
 JMenuItem open = new JMenuItem("Open");
 menu.add(open);
 
 open.addActionListener(e -> {
 int result = chooser.showOpenDialog(null);
 if(result == JFileChooser.APPROVE_OPTION) {
 String path = chooser.getSelectedFile().getPath();
 label.setIcon(new ImageIcon(path));
 }
 });
 
 JMenuItem exit = new JMenuItem("Exit");
 menu.add(exit);
 
 exit.addActionListener(new ActionListener() {

 @Override
 public void actionPerformed(ActionEvent e) {
 System.exit(0);
 }

 });;
 
 
 }
}"/>
</node>
</node>
</node>
<node CREATED="1533566135164" FOLDED="true" ID="ID_810251602" MODIFIED="1534858407482" TEXT="编译&运行">
<node CREATED="1533566142646" ID="ID_710777509" MODIFIED="1533602129594" TEXT="javac ImageViewer.java"/>
<node CREATED="1533566153455" ID="ID_1018455860" MODIFIED="1533602187712" TEXT="java ImageViewer"/>
</node>
</node>
<node CREATED="1533601372475" FOLDED="true" ID="ID_596713749" MODIFIED="1534858407545" TEXT="第一个applet程序">
<node CREATED="1533601386137" FOLDED="true" ID="ID_1448915610" MODIFIED="1534858407501" TEXT="代码">
<node CREATED="1533566101222" FOLDED="true" ID="ID_124828885" MODIFIED="1534858407483" TEXT="文件01">
<node CREATED="1533601877639" FOLDED="true" ID="ID_312296285" MODIFIED="1534858407483" TEXT="文件名">
<node CREATED="1533566128364" ID="ID_129775334" MODIFIED="1533601938329" TEXT="HelloWorldApplet.java"/>
</node>
<node CREATED="1533601884745" FOLDED="true" ID="ID_913677242" MODIFIED="1534858407483" TEXT="文件内容">
<node CREATED="1533566110956" ID="ID_1142134049" MODIFIED="1533601920013" TEXT="import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.GridLayout;

import javax.swing.JApplet;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class HelloWorldApplet extends JApplet {
	
	private JTextField input;
	private JLabel label;

	public void init() {
		EventQueue.invokeLater(() -> {
			input = new JTextField("kk");
			label = new JLabel();
			JPanel panel = new JPanel();
			
			panel.setLayout(new GridLayout(1, 3));
			
			panel.add(new JLabel("请输入名字:"));
			panel.add(input);
			
			setLayout(new BorderLayout());
			add(panel, BorderLayout.NORTH);
			add(label, BorderLayout.CENTER);
		});
	}
	
	public void start() {
		new Thread(() -> {
			for(;;) {
				try {
					label.setText("Hi " + input.getText());
					Thread.sleep(10);
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
		}).start();
	}
}
"/>
</node>
</node>
<node CREATED="1533566101222" FOLDED="true" ID="ID_1569371638" MODIFIED="1534858407501" TEXT="文件02">
<node CREATED="1533601877639" FOLDED="true" ID="ID_583907109" MODIFIED="1534858407484" TEXT="文件名">
<node CREATED="1533566128364" ID="ID_1037072970" MODIFIED="1533601965147" TEXT="HelloWorldApplet.html"/>
</node>
<node CREATED="1533601884745" FOLDED="true" ID="ID_1670258429" MODIFIED="1534858407500" TEXT="文件内容">
<node CREATED="1533566110956" ID="ID_445751194" MODIFIED="1533601951460" TEXT="<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title>RoadApplet</title>
	</head>
	<body>
		<applet code="HelloWorldApplet.class" archive="HelloWorldApplet.jar" width="200" height="200"></applet>
	</body>
</html>"/>
</node>
</node>
</node>
<node CREATED="1533601389423" FOLDED="true" ID="ID_933093428" MODIFIED="1534858407545" TEXT="编译&运行">
<node CREATED="1533601597746" ID="ID_459553205" MODIFIED="1533601764295" TEXT="javac HelloWorldApplet.java"/>
<node CREATED="1533601600979" ID="ID_1385051232" MODIFIED="1533601778321" TEXT="jar -cvf HelloWorldApplet.jar HelloWorldApplet.class"/>
<node CREATED="1533601674578" ID="ID_968960941" MODIFIED="1533601791703" TEXT="appletviewer HelloWorldApplet.html"/>
</node>
</node>
</node>
<node CREATED="1533601991385" FOLDED="true" ID="ID_965156340" MODIFIED="1534858411021" POSITION="right" TEXT="03.Java基本程序设计结构">
<node CREATED="1533625053343" FOLDED="true" ID="ID_1518768254" MODIFIED="1534858409451" STYLE="fork" TEXT="第一个应用程序">
<node CREATED="1533566096850" FOLDED="true" ID="ID_302462444" MODIFIED="1534858408022" TEXT="代码">
<node CREATED="1533566101222" FOLDED="true" ID="ID_1069285423" MODIFIED="1534858407963" TEXT="文件01">
<node CREATED="1533601877639" FOLDED="true" ID="ID_1574394076" MODIFIED="1534858407546" TEXT="文件名">
<node CREATED="1533566128364" ID="ID_1576007702" MODIFIED="1533625119970" TEXT="Welcome.java"/>
</node>
<node CREATED="1533601884745" FOLDED="true" ID="ID_1681212862" MODIFIED="1534858407547" TEXT="文件内容">
<node CREATED="1533566110956" ID="ID_1678696865" MODIFIED="1533625106878" TEXT="public class Welcome {

 public static void main(String[] args) {
 System.out.println("Welcome to java");
 }
}"/>
</node>
<node CREATED="1533625135375" FOLDED="true" ID="ID_162121956" MODIFIED="1534858407886" TEXT="说明">
<node CREATED="1533625139139" FOLDED="true" ID="ID_912390845" MODIFIED="1534858407547" TEXT="public">
<node CREATED="1533625159451" ID="ID_684043958" MODIFIED="1533625165681" TEXT="访问修饰符"/>
<node CREATED="1533625174707" ID="ID_1271366504" MODIFIED="1533625195825" TEXT="用于控制程序其他部分对代码段的访问级别"/>
</node>
<node CREATED="1533625150666" FOLDED="true" ID="ID_1343542081" MODIFIED="1534858407547" TEXT="class">
<node CREATED="1533625205418" ID="ID_595634221" MODIFIED="1533625210147" TEXT="类定义"/>
</node>
<node CREATED="1533625234686" FOLDED="true" ID="ID_1378387602" MODIFIED="1534858407549" TEXT="Welcome">
<node CREATED="1533625244796" FOLDED="true" ID="ID_524283221" MODIFIED="1534858407548" TEXT="类名">
<node CREATED="1533625622727" ID="ID_66015845" MODIFIED="1533625627198" TEXT="ClassName"/>
</node>
<node CREATED="1533625303752" FOLDED="true" ID="ID_1539548756" MODIFIED="1534858407548" TEXT="命名规范">
<node CREATED="1533625258466" ID="ID_1357610917" MODIFIED="1533625276318" TEXT="必须以字母开头, 后面可以跟数字和字母的任意组合"/>
<node CREATED="1533625488771" ID="ID_559766110" MODIFIED="1533625493185" TEXT="区别大小写"/>
<node CREATED="1533625279773" ID="ID_580031115" MODIFIED="1533625285795" TEXT="长度无限制"/>
<node CREATED="1533625286106" ID="ID_622120543" MODIFIED="1533625297124" TEXT="不能使用java保留字"/>
</node>
<node CREATED="1533625330335" FOLDED="true" ID="ID_65166400" MODIFIED="1534858407549" TEXT="标准规范">
<node CREATED="1533625337817" FOLDED="true" ID="ID_1757175424" MODIFIED="1534858407548" TEXT="使用驼峰命名法">
<node CREATED="1533625349995" ID="ID_1243718944" MODIFIED="1533625393911" TEXT="类名首字母大写, 若包含多个单词则每个单词首字母大写"/>
</node>
</node>
<node CREATED="1533625429468" ID="ID_603020225" MODIFIED="1533625478449" TEXT="源代码文件名必须与公共类名相同, 且使用.java做为扩展名"/>
</node>
<node CREATED="1533626707803" FOLDED="true" ID="ID_259877292" MODIFIED="1534858407589" TEXT="main">
<node CREATED="1533626709805" ID="ID_1742618761" MODIFIED="1533626712496" TEXT="程序入口"/>
<node CREATED="1533626712968" ID="ID_1287093343" MODIFIED="1533626737381" TEXT="必须使用public static进行修饰修饰"/>
<node CREATED="1533626737709" FOLDED="true" ID="ID_359914916" MODIFIED="1534858407588" TEXT="void">
<node CREATED="1533626739853" ID="ID_1745856412" MODIFIED="1533626774556" TEXT="表示无返回值"/>
</node>
</node>
<node CREATED="1533626811056" FOLDED="true" ID="ID_214557850" MODIFIED="1534858407657" TEXT="System.out.println">
<node CREATED="1533626817615" ID="ID_1819593050" MODIFIED="1533626841279" TEXT="在控制台打印内容后换行"/>
</node>
<node CREATED="1533626842741" FOLDED="true" ID="ID_1932683843" MODIFIED="1534858407722" TEXT="System.out.print">
<node CREATED="1533626817615" ID="ID_1493150643" MODIFIED="1533626853205" STYLE="fork" TEXT="在控制台打印内容"/>
</node>
</node>
</node>
</node>
<node CREATED="1533566135164" FOLDED="true" ID="ID_1801145602" MODIFIED="1534858408459" TEXT="编译&运行">
<node CREATED="1533566142646" FOLDED="true" ID="ID_1307535266" MODIFIED="1534858408173" TEXT="javac Welcome.java">
<node CREATED="1533625561880" ID="ID_561938493" MODIFIED="1533625611036" TEXT="编译java源代码, 生成以类名命名的字节码文件(ClassName.class)"/>
</node>
<node CREATED="1533566153455" FOLDED="true" ID="ID_1126596109" MODIFIED="1534858408335" TEXT="java Welcome">
<node CREATED="1533625581345" ID="ID_1234378748" MODIFIED="1533625586854" TEXT="运行java字节码文件"/>
</node>
</node>
</node>
<node CREATED="1533625728087" FOLDED="true" ID="ID_818038221" MODIFIED="1534858410679" TEXT="代码注释">
<node CREATED="1533625732214" FOLDED="true" ID="ID_755549354" MODIFIED="1534858410660" TEXT="行注释">
<node CREATED="1533625742977" ID="ID_1891435310" MODIFIED="1533626883611">
<richcontent TYPE="NODE"><html>
<head>
</head>
<body>
<p>
// 单行注释
</p>
</body>
</html></richcontent>
</node>
</node>
<node CREATED="1533625737077" FOLDED="true" ID="ID_1465680361" MODIFIED="1534858410679" TEXT="多行注释">
<node CREATED="1533626892448" ID="ID_468726998" MODIFIED="1533626906163">
<richcontent TYPE="NODE"><html>
<head>
</head>
<body>
<p>
/*
</p>
<p>
    多行注释
</p>
<p>
*/
</p>
</body>
</html></richcontent>
</node>
</node>
<node CREATED="1533625739505" FOLDED="true" ID="ID_964566311" MODIFIED="1534858410679" TEXT="文档注释">
<node CREATED="1533626917976" ID="ID_1293249270" MODIFIED="1533626922579">
<richcontent TYPE="NODE"><html>
<head>
</head>
<body>
<p>
/**
</p>
<p>
* 文档注释
</p>
<p>
*/
</p>
</body>
</html></richcontent>
</node>
</node>
</node>
<node CREATED="1533602301948" FOLDED="true" ID="ID_909803159" MODIFIED="1534858410758" TEXT="基本数据类型">
<node CREATED="1533626943063" FOLDED="true" ID="ID_1330169040" MODIFIED="1534858410739" TEXT="数值">
<node CREATED="1533626971845" FOLDED="true" ID="ID_89759667" MODIFIED="1534858410736" TEXT="整数">
<node CREATED="1533626977137" FOLDED="true" ID="ID_1474365415" MODIFIED="1534858410680" TEXT="byte">
<node CREATED="1533627108059" FOLDED="true" ID="ID_1236325658" MODIFIED="1534858410680" TEXT="存储">
<node CREATED="1533627023787" ID="ID_1158220995" MODIFIED="1533627035425" TEXT="1个字节"/>
</node>
<node CREATED="1533627126402" FOLDED="true" ID="ID_247784756" MODIFIED="1534858410680" TEXT="范围">
<node CREATED="1533629637521" ID="ID_1381512434" MODIFIED="1533629641496" TEXT="-128 - 127"/>
<node CREATED="1533629642821" ID="ID_574745357" MODIFIED="1533629658086" TEXT="Byte.MIN_VALUE ~ Byte.MAX_VALUE"/>
</node>
</node>
<node CREATED="1533626980153" FOLDED="true" ID="ID_1549583631" MODIFIED="1534858410691" TEXT="short">
<node CREATED="1533627108059" FOLDED="true" ID="ID_522988385" MODIFIED="1534858410681" TEXT="存储">
<node CREATED="1533627023787" ID="ID_915551252" MODIFIED="1533627039011" TEXT="2个字节"/>
</node>
<node CREATED="1533627126402" FOLDED="true" ID="ID_185187075" MODIFIED="1534858410681" TEXT="范围">
<node CREATED="1533629661296" ID="ID_375413803" MODIFIED="1533629704967" TEXT="-32768 ~ 32767"/>
<node CREATED="1533629706083" ID="ID_1004453329" MODIFIED="1533629716296" TEXT="Short.MIN_VALUE ~ Short.MAX_VALUE"/>
</node>
</node>
<node CREATED="1533626983584" FOLDED="true" ID="ID_413959816" MODIFIED="1534858410711" TEXT="int">
<node CREATED="1533627108059" FOLDED="true" ID="ID_802548776" MODIFIED="1534858410707" TEXT="存储">
<node CREATED="1533627023787" ID="ID_1011389750" MODIFIED="1533627043133" TEXT="4个字节"/>
</node>
<node CREATED="1533627126402" FOLDED="true" ID="ID_1883146803" MODIFIED="1534858410709" TEXT="范围">
<node CREATED="1533629727278" ID="ID_1859358783" MODIFIED="1533629738594">
<richcontent TYPE="NODE"><html>
<head>
</head>
<body>
<p>
-2147483648 ~ 2147483647
</p>
</body>
</html></richcontent>
</node>
<node CREATED="1533629739873" ID="ID_1850543386" MODIFIED="1533629753100" TEXT="Integer.MIN_VALUE ~ Integer.MAX_VALUE"/>
</node>
</node>
<node CREATED="1533626986359" FOLDED="true" ID="ID_292993774" MODIFIED="1534858410716" TEXT="long">
<node CREATED="1533627108059" FOLDED="true" ID="ID_1062470040" MODIFIED="1534858410713" TEXT="存储">
<node CREATED="1533627023787" ID="ID_1010331780" MODIFIED="1533627047019" TEXT="8个字节"/>
</node>
<node CREATED="1533627126402" FOLDED="true" ID="ID_982831178" MODIFIED="1534858410715" TEXT="范围">
<node CREATED="1533629776421" ID="ID_352493932" MODIFIED="1533629786162" TEXT="-9223372036854775808 ~ 9223372036854775807"/>
<node CREATED="1533629739873" ID="ID_1020818399" MODIFIED="1533629763285" TEXT="Long.MIN_VALUE ~ Long.MAX_VALUE"/>
</node>
</node>
<node CREATED="1533695970764" FOLDED="true" ID="ID_520995356" MODIFIED="1534858410736" TEXT="表示方法">
<node CREATED="1533695973872" ID="ID_966099728" MODIFIED="1533695976883" TEXT="10进制"/>
<node CREATED="1533695977117" FOLDED="true" ID="ID_281119149" MODIFIED="1534858410731" TEXT="2进制">
<node CREATED="1533695996328" ID="ID_1825029425" MODIFIED="1533695999076" TEXT="0B"/>
</node>
<node CREATED="1533695979773" FOLDED="true" ID="ID_474628899" MODIFIED="1534858410733" TEXT="8进制">
<node CREATED="1533695989097" ID="ID_1475384595" MODIFIED="1533695992453" TEXT="0"/>
</node>
<node CREATED="1533695981975" FOLDED="true" ID="ID_1957946626" MODIFIED="1534858410735" TEXT="16进制">
<node CREATED="1533695985409" ID="ID_354763303" MODIFIED="1533695986811" TEXT="0X"/>
</node>
</node>
</node>
<node CREATED="1533626974239" FOLDED="true" ID="ID_1005987457" MODIFIED="1534858410739" TEXT="浮点数">
<node CREATED="1533626989455" FOLDED="true" ID="ID_686538523" MODIFIED="1534858410737" TEXT="float">
<node CREATED="1533627108059" FOLDED="true" ID="ID_1868800563" MODIFIED="1534858410736" TEXT="存储">
<node CREATED="1533627023787" ID="ID_128910614" MODIFIED="1533629803456" TEXT="4个字节"/>
</node>
<node CREATED="1533627126402" FOLDED="true" ID="ID_1494648685" MODIFIED="1534858410736" TEXT="范围">
<node CREATED="1533629739873" ID="ID_712415974" MODIFIED="1533629883107" TEXT="+/- Float.MIN_VALUE ~ Float.MAX_VALUE"/>
</node>
<node CREATED="1533631084874" FOLDED="true" ID="ID_1304108628" MODIFIED="1534858410737" TEXT="有效位">
<node CREATED="1533631089400" ID="ID_1048518906" MODIFIED="1533631105788" TEXT="6 ~ 7位"/>
</node>
</node>
<node CREATED="1533626991244" FOLDED="true" ID="ID_746928248" MODIFIED="1534858410739" TEXT="double">
<node CREATED="1533627108059" FOLDED="true" ID="ID_1872867015" MODIFIED="1534858410737" TEXT="存储">
<node CREATED="1533627023787" ID="ID_257270414" MODIFIED="1533627047019" TEXT="8个字节"/>
</node>
<node CREATED="1533627126402" FOLDED="true" ID="ID_653361326" MODIFIED="1534858410738" TEXT="范围">
<node CREATED="1533629739873" ID="ID_905357996" MODIFIED="1533629896463" TEXT="+/- Double.MIN_VALUE ~ Double.MAX_VALUE"/>
</node>
<node CREATED="1533631084874" FOLDED="true" ID="ID_522713056" MODIFIED="1534858410738" TEXT="有效位">
<node CREATED="1533631089400" ID="ID_398856721" MODIFIED="1533631093555" TEXT="15位"/>
</node>
<node CREATED="1533630807616" FOLDED="true" ID="ID_968390271" MODIFIED="1534858410738" TEXT="其他值">
<node CREATED="1533630812933" ID="ID_1592512248" MODIFIED="1533630818807" TEXT="Double.NaN"/>
<node CREATED="1533630819102" ID="ID_194684718" MODIFIED="1533630827844" TEXT="Double.POSITIVE_INFINITY"/>
<node CREATED="1533630828063" ID="ID_1931821853" MODIFIED="1533630836915" TEXT="Double.NEGATIVE_INFINITY"/>
</node>
</node>
<node CREATED="1533696005507" FOLDED="true" ID="ID_1673662557" MODIFIED="1534858410739" TEXT="表示方法">
<node CREATED="1533696011714" ID="ID_177124862" MODIFIED="1533696022450" TEXT="科学计数法"/>
</node>
</node>
</node>
<node CREATED="1533626954831" FOLDED="true" ID="ID_1681979256" MODIFIED="1534858410757" TEXT="字符类型">
<node CREATED="1533626994925" FOLDED="true" ID="ID_62204347" MODIFIED="1534858410756" TEXT="char">
<node CREATED="1533638381419" ID="ID_1625559948" MODIFIED="1533638390308" TEXT="表示单个字符"/>
<node CREATED="1533638873919" ID="ID_1043214505" MODIFIED="1533638877287" TEXT="使用单引号包含"/>
<node CREATED="1533638536452" FOLDED="true" ID="ID_1061055933" MODIFIED="1534858410755" TEXT="表示方法">
<node CREATED="1533638391801" FOLDED="true" ID="ID_603798200" MODIFIED="1534858410740" TEXT="字面量">
<node CREATED="1533638945271" ID="ID_1194902188" MODIFIED="1533638947045" TEXT="'A'"/>
</node>
<node CREATED="1533638799648" FOLDED="true" ID="ID_96078828" MODIFIED="1534858410752" TEXT="使用转移序列\u修饰的十六进制值">
<node CREATED="1533639179482" ID="ID_849958791" MODIFIED="1533639183344" TEXT="'\u2122'"/>
<node CREATED="1533639273411" FOLDED="true" ID="ID_1611294408" MODIFIED="1534858410740" TEXT="范围">
<node CREATED="1533639275460" ID="ID_1086789825" MODIFIED="1533639285687" TEXT="\u0000 ~ \uFFFF"/>
</node>
<node CREATED="1533639303215" ID="ID_1171299792" MODIFIED="1533639374546" TEXT="\u修饰的十六进制可以出现在加引号的字符常量和字符中，还可以出现在代码中(引号之外)"/>
<node CREATED="1533639486791" FOLDED="true" ID="ID_474310852" MODIFIED="1534858410742" TEXT="unicode转义序列在解析代码之前得到处理">
<node CREATED="1533639520512" FOLDED="true" ID="ID_1177817459" MODIFIED="1534858410741" TEXT=""\u0022+\u0022"">
<node CREATED="1533639616963" FOLDED="true" ID="ID_1297159570" MODIFIED="1534858410740" STYLE="fork" TEXT="空字符串">
<node CREATED="1533639634296" ID="ID_1268359659" MODIFIED="1533639642187" TEXT="\u0022解析为""/>
<node CREATED="1533639642904" ID="ID_395638050" MODIFIED="1533639648675" TEXT="两个空字符串相加"/>
</node>
</node>
<node CREATED="1533639534571" FOLDED="true" ID="ID_810240384" MODIFIED="1534858410741" TEXT="// \u0044">
<node CREATED="1533639611729" FOLDED="true" ID="ID_992138124" MODIFIED="1534858410741" TEXT="报错">
<node CREATED="1533639650296" ID="ID_668201285" MODIFIED="1533639661652" TEXT="\u0044变为换行符"/>
</node>
</node>
<node CREATED="1533639549487" FOLDED="true" ID="ID_685180825" MODIFIED="1534858410742" TEXT="//c:\users">
<node CREATED="1533639614119" FOLDED="true" ID="ID_1787181470" MODIFIED="1534858410741" TEXT="报错">
<node CREATED="1533639663050" ID="ID_1784554394" MODIFIED="1533639678695" TEXT="\u后非4个十六进制数"/>
</node>
</node>
</node>
</node>
<node CREATED="1533638815020" FOLDED="true" ID="ID_295728639" MODIFIED="1534858410755" TEXT="转义序列">
<node CREATED="1533639184628" FOLDED="true" ID="ID_1121043570" MODIFIED="1534858410753" TEXT="'\b'">
<node CREATED="1533639223022" ID="ID_1313939716" MODIFIED="1533639225660" TEXT="退格"/>
<node CREATED="1533639566178" ID="ID_574469545" MODIFIED="1533639573912" TEXT="\u0008"/>
</node>
<node CREATED="1533639196471" FOLDED="true" ID="ID_1766231272" MODIFIED="1534858410753" TEXT="'\t'">
<node CREATED="1533639226854" ID="ID_392830407" MODIFIED="1533639230783" TEXT="制表符"/>
<node CREATED="1533639574919" ID="ID_499136436" MODIFIED="1533639578079" TEXT="\u0009"/>
</node>
<node CREATED="1533639199489" FOLDED="true" ID="ID_1104621606" MODIFIED="1534858410753" TEXT="'\n'">
<node CREATED="1533639234816" ID="ID_253643335" MODIFIED="1533639237053" TEXT="换行"/>
<node CREATED="1533639579008" ID="ID_996758931" MODIFIED="1533639582533" TEXT="\u000a"/>
</node>
<node CREATED="1533639202877" FOLDED="true" ID="ID_763637967" MODIFIED="1534858410753" TEXT="'\r'">
<node CREATED="1533639231904" ID="ID_495608905" MODIFIED="1533639233791" TEXT="回车"/>
<node CREATED="1533639583418" ID="ID_257084782" MODIFIED="1533639586743" TEXT="\u000d"/>
</node>
<node CREATED="1533639207715" FOLDED="true" ID="ID_1482552994" MODIFIED="1534858410754" TEXT="'\"'">
<node CREATED="1533639251437" ID="ID_761167703" MODIFIED="1533639254984" TEXT="双引号"/>
<node CREATED="1533639588178" ID="ID_126705736" MODIFIED="1533639591721" TEXT="\u0022"/>
</node>
<node CREATED="1533639212136" FOLDED="true" ID="ID_545638716" MODIFIED="1534858410754" TEXT="'\''">
<node CREATED="1533639255979" ID="ID_142961641" MODIFIED="1533639257904" TEXT="单引号"/>
<node CREATED="1533639593051" ID="ID_423447655" MODIFIED="1533639596427" TEXT="\u0027"/>
</node>
<node CREATED="1533639217226" FOLDED="true" ID="ID_1282781933" MODIFIED="1534858410754" TEXT="'\\'">
<node CREATED="1533639259746" ID="ID_1346229076" MODIFIED="1533639262794" TEXT="反斜线"/>
<node CREATED="1533639597360" ID="ID_1566356313" MODIFIED="1533639601159" TEXT="\u005c"/>
</node>
</node>
</node>
<node CREATED="1533640844123" FOLDED="true" ID="ID_270342545" MODIFIED="1534858410756" TEXT="注意">
<node CREATED="1533640898870" ID="ID_417008471" MODIFIED="1533640899579" TEXT="https://www.cnblogs.com/louiswong/p/6062417.html"/>
<node CREATED="1533641013733" FOLDED="true" ID="ID_1136715611" MODIFIED="1534858410755" TEXT="在内码(运行内存中)中char使用UTF-16编码方式">
<node CREATED="1533641480567" ID="ID_1360354674" MODIFIED="1533642017844" TEXT="UTF16编码中, 英文字符占两个字节, 绝大多数汉字(常用汉字)占用两个字节, 个别汉字(后期加入unicode编码的汉字, 一般是极少用到的生僻字)占用四个字节"/>
<node CREATED="1533641555878" ID="ID_983990097" MODIFIED="1533641557282" TEXT="一个字符会占用2个或4个字节"/>
</node>
<node CREATED="1533641487061" FOLDED="true" ID="ID_523508239" MODIFIED="1534858410756" TEXT="在外码(源码和字节码)中char使用UTF-8编码">
<node CREATED="1533641526634" ID="ID_1976952905" MODIFIED="1533642030036" TEXT="UTF8编码中, 英文字符占用一个字节, 绝大多数汉字占用三个字节, 个别汉字占用四个字节"/>
</node>
</node>
</node>
</node>
<node CREATED="1533626947692" FOLDED="true" ID="ID_1020017207" MODIFIED="1534858410757" TEXT="布尔类型">
<node CREATED="1533626997976" ID="ID_1627741717" MODIFIED="1533626999601" TEXT="boolean"/>
<node CREATED="1533641807680" FOLDED="true" ID="ID_1498739468" MODIFIED="1534858410757" TEXT="值">
<node CREATED="1533641812250" ID="ID_1170635650" MODIFIED="1533641813195" TEXT="true"/>
<node CREATED="1533641813456" ID="ID_41446150" MODIFIED="1533641815924" TEXT="false"/>
</node>
<node CREATED="1533641921598" ID="ID_585346070" MODIFIED="1533641943178" TEXT="整数类型和布尔值之间不能相互转化"/>
</node>
</node>
<node CREATED="1533642127718" FOLDED="true" ID="ID_1504188761" MODIFIED="1534858410759" TEXT="变量">
<node CREATED="1533642131740" FOLDED="true" ID="ID_1703913174" MODIFIED="1534858410759" TEXT="声明">
<node CREATED="1533642215593" FOLDED="true" ID="ID_1261703965" MODIFIED="1534858410758" TEXT="变量名命名规则">
<node CREATED="1533642223552" ID="ID_1905756427" MODIFIED="1533642261442" TEXT="必须以字母开头，并由字符和数字构成"/>
<node CREATED="1533642445172" FOLDED="true" ID="ID_379712177" MODIFIED="1534858410758" STYLE="fork" TEXT="字母包括a-z, A-Z, _, $, 或其他语言中表示字母的任何Unicode字符">
<node CREATED="1533642533772" ID="ID_704315052" MODIFIED="1533642554351" TEXT="不能包含空格, +等字符"/>
</node>
<node CREATED="1533642490039" ID="ID_1377417555" MODIFIED="1533642518877" TEXT="数字包括0-9和在其他语言中表示数字的任何Unicode字符"/>
<node CREATED="1533642525697" ID="ID_1576563159" MODIFIED="1533642532014" TEXT="变量名大小写敏感"/>
<node CREATED="1533643416314" ID="ID_1204477077" MODIFIED="1533643428776" TEXT="不能为java保留字"/>
<node CREATED="1533643436361" ID="ID_225314113" MODIFIED="1533643455445" TEXT="不要在变量中使用$"/>
</node>
</node>
<node CREATED="1533642136104" FOLDED="true" ID="ID_814153622" MODIFIED="1534858410759" TEXT="初始化">
<node CREATED="1533643464327" ID="ID_1556495525" MODIFIED="1533643482328" TEXT="变量声明后必须使用赋值对变量进行初始化后才可以使用"/>
<node CREATED="1533643492907" ID="ID_1104841740" MODIFIED="1533643512819" TEXT="可以将声明与初始化放在一个语句中进行"/>
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</node>
<node CREATED="1533643525613" FOLDED="true" ID="ID_1986714101" MODIFIED="1534858410759" TEXT="常量">
<node CREATED="1533643533422" ID="ID_412995607" MODIFIED="1533643560017" TEXT="使用final修饰的变量, 只能被复制一次, 后续不能更改"/>
<node CREATED="1533643560323" ID="ID_1537063135" MODIFIED="1533643571336" TEXT="习惯常量名称使用全大写"/>
<node CREATED="1533643590020" ID="ID_191077997" MODIFIED="1533643626474" TEXT="常量可以定义在类中, 使用static final修饰, 称为类常量"/>
</node>
<node CREATED="1533643662899" FOLDED="true" ID="ID_78732410" MODIFIED="1534858410896" TEXT="运算符">
<node CREATED="1533643666307" FOLDED="true" ID="ID_266040100" MODIFIED="1534858410761" TEXT="算术运算符">
<node CREATED="1533643705796" ID="ID_1893994480" MODIFIED="1533643706425" TEXT="+"/>
<node CREATED="1533643706718" ID="ID_719011740" MODIFIED="1533643709062" TEXT="-"/>
<node CREATED="1533643709377" ID="ID_689132068" MODIFIED="1533643710421" TEXT="*"/>
<node CREATED="1533643710714" ID="ID_1955882016" MODIFIED="1533643712072" TEXT="/"/>
<node CREATED="1533643712373" ID="ID_1221351777" MODIFIED="1533643714690" TEXT="%"/>
<node CREATED="1533643971796" FOLDED="true" ID="ID_823161261" MODIFIED="1534858410760" TEXT="其他">
<node CREATED="1533643973662" FOLDED="true" ID="ID_601645860" MODIFIED="1534858410760" TEXT="修饰符strictfp">
<node CREATED="1533643982729" ID="ID_1135624741" MODIFIED="1533643994042" TEXT="严格浮点运算"/>
</node>
</node>
</node>
<node CREATED="1533643874364" FOLDED="true" ID="ID_1880991442" MODIFIED="1534858410779" TEXT="数学函数与常量">
<node CREATED="1533643880516" FOLDED="true" ID="ID_949514903" MODIFIED="1534858410762" TEXT="Math">
<node CREATED="1533644050647" FOLDED="true" ID="ID_176735225" MODIFIED="1534858410761" TEXT="静态方法">
<node CREATED="1533643883481" ID="ID_199927521" MODIFIED="1533643886284" TEXT="Math.sqrt"/>
<node CREATED="1533643890373" ID="ID_1683966581" MODIFIED="1533643892422" TEXT="Math.pow"/>
<node CREATED="1533643914526" ID="ID_1577033577" MODIFIED="1533643921896" TEXT="Math.floorMod"/>
<node CREATED="1533644081340" ID="ID_546949647" MODIFIED="1533644084526" TEXT="Math.sin"/>
<node CREATED="1533644084777" ID="ID_36224829" MODIFIED="1533644088549" TEXT="Math.cos"/>
<node CREATED="1533644088833" ID="ID_760984922" MODIFIED="1533644092687" TEXT="Math.tan"/>
<node CREATED="1533644092948" ID="ID_63125247" MODIFIED="1533644095715" TEXT="Math.atan"/>
<node CREATED="1533644096101" ID="ID_1393380362" MODIFIED="1533644101108" TEXT="Math.atan2"/>
<node CREATED="1533644127110" ID="ID_802047140" MODIFIED="1533644161645" TEXT="Math.exp"/>
<node CREATED="1533644108039" ID="ID_1606384754" MODIFIED="1533644112013" TEXT="Math.log"/>
<node CREATED="1533644120512" ID="ID_1249896754" MODIFIED="1533644126758" TEXT="Math.log10"/>
<node CREATED="1533694892964" ID="ID_1102862733" MODIFIED="1533694898002" TEXT="Math.round"/>
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<node CREATED="1533643967998" FOLDED="true" ID="ID_1671893302" MODIFIED="1534858410762" TEXT="常量">
<node CREATED="1533644151764" ID="ID_634703941" MODIFIED="1533644154298" TEXT="Math.PI"/>
<node CREATED="1533644154602" ID="ID_866202978" MODIFIED="1533644156243" TEXT="Math.E"/>
</node>
</node>
</node>
<node CREATED="1533694876102" FOLDED="true" ID="ID_1201589985" MODIFIED="1534858410779" TEXT="数值类型转换">
<node CREATED="1533694918458" FOLDED="true" ID="ID_1475551622" MODIFIED="1534858410779" TEXT="原则">
<node CREATED="1533695407785" ID="ID_1647928290" MODIFIED="1533695430000" TEXT="两个操作数中有一个为double, 则另一个操作数转换为double"/>
<node CREATED="1533695407785" ID="ID_243909277" MODIFIED="1533695441629" TEXT="两个操作数中有一个为float, 则另一个操作数转换为float"/>
<node CREATED="1533695407785" ID="ID_1322481618" MODIFIED="1533695450235" TEXT="两个操作数中有一个为long, 则另一个操作数转换为long"/>
<node CREATED="1533695407785" ID="ID_933627655" MODIFIED="1533695463367" TEXT="两个操作数都转换为int"/>
</node>
</node>
<node CREATED="1533694881723" FOLDED="true" ID="ID_786412849" MODIFIED="1534858410780" TEXT="强制类型转换">
<node CREATED="1533695471475" ID="ID_1831313506" MODIFIED="1533695594913" TEXT="强制转换会导致信息丢失(精度、截断)"/>
<node CREATED="1533695596549" ID="ID_785291867" MODIFIED="1533695622773" TEXT="不要在boolean类型与其他数值类型之间进行转换"/>
</node>
<node CREATED="1533695644061" FOLDED="true" ID="ID_198588039" MODIFIED="1534858410780" TEXT="赋值与运算符结合">
<node CREATED="1533695673449" ID="ID_166511628" MODIFIED="1533695677425" TEXT="+="/>
<node CREATED="1533695681022" ID="ID_1199781191" MODIFIED="1533695682625" TEXT="-="/>
<node CREATED="1533695683657" ID="ID_1573795806" MODIFIED="1533695685222" TEXT="*="/>
<node CREATED="1533695677687" ID="ID_546136712" MODIFIED="1533695679218" TEXT="/="/>
<node CREATED="1533695686849" ID="ID_730691629" MODIFIED="1533695688225" TEXT="%="/>
<node CREATED="1533695697432" ID="ID_94892180" MODIFIED="1533695718107" TEXT="如果运算结果与左操作数类型不同则会发生强制转换"/>
</node>
<node CREATED="1533695723220" FOLDED="true" ID="ID_355714996" MODIFIED="1534858410796" TEXT="自增/减">
<node CREATED="1533695732288" FOLDED="true" ID="ID_1168883102" MODIFIED="1534858410781" TEXT="左自增/减">
<node CREATED="1533695766633" ID="ID_1259009862" MODIFIED="1533695770582" TEXT="++var"/>
<node CREATED="1533695770833" ID="ID_771631556" MODIFIED="1533695772412" TEXT="--var"/>
<node CREATED="1533695783966" ID="ID_755432679" MODIFIED="1533695802020" TEXT="在表达式中先进行自增/减再返回表达式结果"/>
</node>
<node CREATED="1533695735811" FOLDED="true" ID="ID_1964745058" MODIFIED="1534858410795" TEXT="右自增/减">
<node CREATED="1533695775145" ID="ID_685393672" MODIFIED="1533695780636" TEXT="var++"/>
<node CREATED="1533695780862" ID="ID_1260504292" MODIFIED="1533695782458" TEXT="var--"/>
<node CREATED="1533695783966" ID="ID_1134678412" MODIFIED="1533695825182" STYLE="fork" TEXT="在表达式中先返回表达式结果再进行自增/减"/>
</node>
</node>
<node CREATED="1533643686650" FOLDED="true" ID="ID_414423266" MODIFIED="1534858410796" TEXT="关系运算符">
<node CREATED="1533695842875" ID="ID_1448716988" MODIFIED="1533695844235" TEXT=">"/>
<node CREATED="1533695844517" ID="ID_813281571" MODIFIED="1533695845555" TEXT="<"/>
<node CREATED="1533695845807" ID="ID_1355844254" MODIFIED="1533695846738" TEXT=">="/>
<node CREATED="1533695846974" ID="ID_272522321" MODIFIED="1533695849223" TEXT="<="/>
<node CREATED="1533695849476" ID="ID_377563546" MODIFIED="1533695850530" TEXT="=="/>
<node CREATED="1533695850791" ID="ID_1456576988" MODIFIED="1533695853031" TEXT="!="/>
</node>
<node CREATED="1533643682219" FOLDED="true" ID="ID_208916040" MODIFIED="1534858410797" TEXT="逻辑运算符">
<node CREATED="1533695854379" FOLDED="true" ID="ID_256191594" MODIFIED="1534858410796" TEXT="&&">
<node CREATED="1533695862867" ID="ID_208627044" MODIFIED="1533695876386" TEXT="只有两边都为true, 结果为true"/>
<node CREATED="1533695893580" ID="ID_1339453488" MODIFIED="1533695897300" TEXT="短路与"/>
</node>
<node CREATED="1533695859425" FOLDED="true" ID="ID_1366475694" MODIFIED="1534858410797" TEXT="||">
<node CREATED="1533695862867" ID="ID_432324415" MODIFIED="1533695887533" TEXT="两边只要有一个为true, 结果为true"/>
<node CREATED="1533695893580" ID="ID_1267097096" MODIFIED="1533695903561" TEXT="短路或"/>
</node>
<node CREATED="1533695860714" ID="ID_104308518" MODIFIED="1533695861537" TEXT="!"/>
</node>
<node CREATED="1533695911089" FOLDED="true" ID="ID_481857234" MODIFIED="1534858410797" TEXT="三目运算">
<node CREATED="1533695916329" ID="ID_1076028935" MODIFIED="1533695923799" TEXT="a? b : c"/>
</node>
<node CREATED="1533695928876" FOLDED="true" ID="ID_1734130285" MODIFIED="1534858410895" TEXT="位运算">
<node CREATED="1533695934997" ID="ID_1118386001" MODIFIED="1533695936841" TEXT="&"/>
<node CREATED="1533695937087" ID="ID_42572108" MODIFIED="1533695937845" TEXT="|"/>
<node CREATED="1533695938087" ID="ID_43986751" MODIFIED="1533695942171" TEXT="^"/>
<node CREATED="1533695942414" ID="ID_635874551" MODIFIED="1533695943313" TEXT="~"/>
<node CREATED="1533696049667" ID="ID_1584151510" MODIFIED="1533696050706" TEXT="<<"/>
<node CREATED="1533696050961" FOLDED="true" ID="ID_1884366278" MODIFIED="1534858410798" TEXT=">>">
<node CREATED="1533696065399" ID="ID_126332960" MODIFIED="1533696073707" TEXT="带符号位右移"/>
</node>
<node CREATED="1533696052381" FOLDED="true" ID="ID_1582938849" MODIFIED="1534858410798" TEXT=">>>">
<node CREATED="1533696065399" ID="ID_1584656369" MODIFIED="1533696078969" TEXT="不带符号位右移"/>
</node>
</node>
</node>
<node CREATED="1533696169894" FOLDED="true" ID="ID_182168907" MODIFIED="1534858410897" TEXT="枚举类型">
<node CREATED="1533696176899" ID="ID_1480877052" MODIFIED="1533696180213" TEXT="enum"/>
<node CREATED="1533696642131" FOLDED="true" ID="ID_79304649" MODIFIED="1534858410897" TEXT="实例">
<node CREATED="1533696657071" FOLDED="true" ID="ID_459630483" MODIFIED="1534858410896" TEXT="定义">
<node CREATED="1533696648442" ID="ID_911625285" MODIFIED="1533696656028">
<richcontent TYPE="NODE"><html>
<head>
</head>
<body>
<p>
enum Status {OK, DELETED}
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</body>
</html></richcontent>
</node>
</node>
<node CREATED="1533696661049" FOLDED="true" ID="ID_1494953310" MODIFIED="1534858410897" TEXT="使用">
<node CREATED="1533696663047" ID="ID_1601029039" MODIFIED="1533696665251" TEXT="Status.OK"/>
</node>
</node>
</node>
<node CREATED="1533696690168" FOLDED="true" ID="ID_204370038" MODIFIED="1534858410925" TEXT="字符串">
<node CREATED="1533696778246" ID="ID_922160402" MODIFIED="1533696824913" TEXT="字符串为Java标准库中的String类, 使用双引号包含的字符串都是String类的实例"/>
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