zuoyou1990的专栏

原创 轻松学算法-《算法之道》

原创 创建一个简单的计算器

import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Exercise15_4 extends JFrame implements ActionListener { // 设置文本区域 private JTextField jtfNum1, jtfNum2, jtfResult

原创 模拟交通信号灯

import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Exercise15_3 extends JFrame implements ItemListener { // 创建按钮 private JRadioButton jRed, jYellow, jGreen;

原创 添加一组可以选择背景颜色的单选按钮

消息面板import java.awt.Dimension;import java.awt.FontMetrics;import java.awt.Graphics;import javax.swing.JPanel;public class MessagePanel extends JPanel { private String message; privat

原创 显示一个运行的风扇

import java.awt.Graphics;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.Timer;public class Dr

原创 是用箭头键画线

import java.awt.Graphics;import java.awt.event.KeyAdapter;import java.awt.event.KeyEvent;import javax.swing.JFrame;import javax.swing.JPanel;public class KeyEventDemo extends JFrame{ K

原创 在面板上找出点击了哪个按钮

消息面板import java.awt.Dimension;import java.awt.FontMetrics;import java.awt.Graphics;import javax.swing.JPanel;//根据P353页程序清单13-10编写消息面板的程序public class MessagePanel extends JPanel{ privat

原创 JAVA系列之画国际象棋盘

import java.awt.*;import javax.swing.JPanel;public class Chess extends JPanel { int x = 0; int y = 0; boolean isWhite = true; public Chess(){ }public void paintComponent(Graphics g){  super.paintCom