事件处理

import java.awt.Button;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

class A implements ActionListener {
	public void actionPerformed(ActionEvent e) {
		System.out.println("hello");
	}
}

public class Test {
	public static void main(String[] args) {

		Frame f = new Frame("haha");
		Button bn = new Button("ok");
		f.add(bn);
		A aa = new A();

		bn.addActionListener(aa);

		f.pack();
		f.setVisible(true);

		// 适配器，设置窗体可以关闭
		f.addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}
		});
	}
}

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.Panel;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class Test {
	public static void main(String[] args) {
		Frame f = new Frame();
		f.setSize(300, 300);
		f.setLayout(new GridLayout(2, 1));// 2行1列

		Panel p1 = new Panel();
		p1.setLayout(new BorderLayout());
		Panel p1_1 = new Panel();
		p1_1.setLayout(new GridLayout(2, 1));// 2行1列
		Button bn1 = new Button("BUTTON1");
		Button bn2 = new Button("BUTTON2");
		Button bn3 = new Button("BUTTON3");
		Button bn4 = new Button("BUTTON4");
		p1.add(bn1, BorderLayout.WEST);
		p1_1.add(bn3);
		p1_1.add(bn4);
		p1.add(p1_1, BorderLayout.CENTER);
		p1.add(bn2, BorderLayout.EAST);

		Panel p2 = new Panel();
		p2.setLayout(new BorderLayout());
		Panel p2_1 = new Panel();
		p2_1.setLayout(new GridLayout(2, 2));// 2行2列
		Button bn5 = new Button("BUTTON5");
		Button bn6 = new Button("BUTTON6");
		Button bn7 = new Button("BUTTON7");
		Button bn8 = new Button("BUTTON8");
		Button bn9 = new Button("BUTTON9");
		Button bn10 = new Button("BUTTON10");
		p2.add(bn5, BorderLayout.WEST);
		p2_1.add(bn7);
		p2_1.add(bn8);
		p2_1.add(bn9);
		p2_1.add(bn10);
		p2.add(p2_1, BorderLayout.CENTER);
		p2.add(bn6, BorderLayout.EAST);

		f.add(p1);
		f.add(p2);
		f.pack();
		f.setVisible(true);

		// 适配器，设置窗体可以关闭
		f.addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}
		});
	}
}