GUID_demo.java

import javax.swing.*;
import java.awt.*;
public class GUID_demo {
	public static void main(String[]args) {
		JFrame mainFrame = new JFrame();
		mainFrame.setSize(300,150);
		mainFrame.setTitle("The First GUI");
		
		JPanel panel = new JPanel();
		panel.setLayout(new GridLayout(3,2,10,10));
		
		JLabel userLabel = new JLabel("User Name:");
		JTextField userField = new JTextField();
		
		JLabel pwdLabel = new JLabel("Password:");
		JPasswordField pwdField = new JPasswordField();
		
		JButton loginbtn = new JButton("Login:");
		
		panel.add(userLabel);
		panel.add(userField);
		panel.add(pwdLabel);
		panel.add(pwdField);
		panel.add(new JLabel(""));
		panel.add(loginbtn);
		
		mainFrame.add(panel);
		
		mainFrame.setLocationRelativeTo(null);//center
		
		mainFrame.setVisible(true);
	}

}