import java.awt.event.*; public class TestGUI{ public static void main(String args[]){ Form form=new Form(); form.setSize(300,200); form.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); form.setVisible(true); } } class Form extends JFrame implements ActionListener{ ...
import java.awt.*; import java.awt.event.*; import java.applet.Applet; /* */ public class ex17_3 extends Applet implements ActionListener{ TextField tf1=new TextField(5); TextField tf2=new TextField(5); TextField tf3=new TextField(5); Label l1=new Label("+"); Label l2=new La...
import java.awt.*;import java. 下列程序实现了2个监听器接口:ActionListener和W1ndowListener。 import java.awt.*; import java.awt.event.*; public class ex39___ { public static void main(String[] args) { ex39 bj = new ex39(); obj .go(); } public void go() { Frame. f = new Fr...
import java.awt.event.*;class DongNanXiBei extends JFrame{ JPanel panel1=new JPanel();JPanel panel2=new JPanel();JTextField textfield=new JTextField(10);JButton button[]=new JButton[5];//PoliceListen listener;String buttonName[]={"北","南","西","东","中"};String direc...
import java.awt.Color; import java.awt.Graphics; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.util.Random; import java.util.Stack; import javax.swing.JFrame; import javax.swing.JOptionPane; import javax.swing.JPanel; class Lattice { static final int INTREE ...