GUI编程：
一个界面的组件：
- 窗口
- 弹窗
- 面板
- 文本框
- 列边框
- 按钮
- 图片
- 监听事件
- 鼠标
- 键盘事件
- 破解工具
1 简介
Gui的核心技术：Swing AWT，
不流行的原因：
- 因为不美观
- 需要Gre环境
为什么我们要学习？
- 可以写出自己心中的想要的小工具
- 工作的时候，也可能需要维护到swiing界面，概率极低
- 了结MVC架构，了结监听
2 AWT
2.1 Awt介绍
- 包含了很多类和接口！GUI：图形用户编程
- 元素：窗口，按钮，文本框
- java
2.2、组件和容器
1、Frame
package com.kang.lesson1;import java.awt.*;public class TestFrame { public static void main(String[] args) { // 看源码，JDK，Frame Frame frame = new Frame("我的第一个java图形窗口"); //设置可见性 frame.setVisible(true); //设置窗口大小 frame.setSize(200,200); //设置窗口背景颜色 frame.setBackground(new Color(116, 53, 148)); //设置弹出坐标位置 frame.setLocation(200, 200); //设置大小是否固定 frame.setResizable(true); }}结果如下所示：
import java.awt.*;public class TestFrame2 { public static void main(String[] args) { new MyFrame(100, 100, 100, 100, Color.YELLOW); new MyFrame(200, 100, 100, 100, Color.GRAY); new MyFrame(100, 200, 100, 100, Color.blue); new MyFrame(200, 200, 100, 100, Color.green); }}class MyFrame extends Frame { static int id = 0; public MyFrame(int x,int y,int w,int h,Color color){ super("MyFrame"+(++id)); super.setBounds(x, y, w, h); super.setBackground(color); setVisible(true); }}结果显示：
2、 面板
解决了窗口关闭事件！
package com.kang.lesson1;import java.awt.*;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.awt.event.WindowListener;public class TestPanel { //panel 可以看成一个空间，但是不能单独存在 public static void main(String[] args) { Frame frame = new Frame(); //b布局的概念 Panel panel = new Panel(); //设置布局 frame.setLayout(null); //设置坐标 frame.setBounds(100, 100, 500, 500); frame.setBackground(new Color(203, 68, 203)); panel.setBounds(50, 50, 400, 400); panel.setBackground(new Color(221, 55, 55)); //窗口添加面板frame.add(panel) frame.add(panel); frame.setVisible(true); //关闭窗口：监听事件——监听关闭窗口事件System.exit（0）； frame.addWindowListener(new WindowAdapter() {// 窗口关闭要做的事情 @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); }}结果展示：
2.3、 布局
- 流式布局
package com.kang.lesson1;import java.awt.*;public class TestFlowLayout { public static void main(String[] args) { Frame frame = new Frame(); //组件：按钮 Button button1 = new Button("Button1"); Button button2 = new Button("Button2"); Button button3 = new Button("Button3"); //设置为六十布局 frame.setLayout(new FlowLayout(FlowLayout.RIGHT)); frame.setBounds(100, 100, 300, 300); //把按钮添加上去 frame.add(button1); frame.add(button2); frame.add(button3); frame.setVisible(true); }}- 东西南北中
package com.kang.lesson1;import java.awt.*;public class TestBorderLayout { public static void main(String[] args) { Frame frame = new Frame("TestBorderLayout"); Button button1 = new Button("East"); Button button2 = new Button("West"); Button button3 = new Button("South"); Button button4 = new Button("North"); Button button5 = new Button("Center"); frame.add(button1,BorderLayout.EAST); frame.add(button2,BorderLayout.WEST); frame.add(button3,BorderLayout.SOUTH); frame.add(button4,BorderLayout.NORTH); frame.add(button5,BorderLayout.CENTER); frame.setBounds(100, 100, 400, 400); frame.setVisible(true); }}- 表格式布局
package com.kang.lesson1;import java.awt.*;public class TestGridLayout { public static void main(String[] args) { Frame frame = new Frame("TestGridLayout"); Button button1 = new Button("tab1"); Button button2 = new Button("tab2"); Button button3 = new Button("tab3"); Button button4 = new Button("tab4"); Button button5 = new Button("tab5"); Button button6 = new Button("tab6"); frame.setLayout(new GridLayout(3, 2)); frame.add(button1); frame.add(button2); frame.add(button3); frame.add(button4); frame.add(button5); frame.add(button6); frame.setSize(200, 200);// frame.pack(); //java函数，优化布局 frame.setVisible(true); }}- 课后练习
package com.kang.lesson1;import java.awt.*;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.awt.event.WindowListener;public class ExDemo { public static void main(String[] args) { Frame frame = new Frame(); frame.setBounds(100, 100, 300, 300); frame.setBackground(new Color(121, 23, 96)); frame.setVisible(true); frame.setLayout(new GridLayout(2, 1)); Panel p1 = new Panel(new BorderLayout());//panel在创建之初就已经形成，不能再被布局 Panel p2 = new Panel(new BorderLayout()); Panel p3 = new Panel(new GridLayout(2, 1)); Panel p4 = new Panel(new GridLayout(2, 2)); Button button1 = new Button("button1"); Button button2 = new Button("button2"); Button button3 = new Button("button3"); Button button4 = new Button("button4"); Button button5 = new Button("button5"); Button button6 = new Button("button6"); p3.add(button3); p3.add(button4); for (int i = 7; i < 11; i++) { p4.add(new Button("button"+i)); } p1.add(button1,BorderLayout.WEST); p1.add(p3,BorderLayout.CENTER); p1.add(button2,BorderLayout.EAST); p2.add(button5,BorderLayout.WEST); p2.add(p4,BorderLayout.CENTER); p2.add(button6,BorderLayout.EAST); frame.add(p1); frame.add(p2); frame.addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); }}总结：
Frame是个一个顶级窗口
Panel无法单独显示，必须添加到某个容器中
布局管理器
- 流式布局管理器
- 东西南北中管理器
- 表格管理器
大小、背景、颜色，监听
2.4、监听事件
事件监听：当某个事情发生的时候，干什么？
package com.kang.lesson2;import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;public class TestActonEvent { public static void main(String[] args) { //按下按钮，触发一些事件 Frame frame = new Frame("TestActonEvent"); Button button = new Button("button1"); frame.add(button,BorderLayout.CENTER); frame.pack(); frame.setVisible(true); //因为 addActionListener（） 需要一个ActionListener类，所以构造一个ActionListener MyActionListener myActionListener = new MyActionListener(); button.addActionListener(myActionListener); frameClosing(frame); } //关闭窗口的方法 public static void frameClosing(Frame frame){ frame.addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); }}//事件监听class MyActionListener implements ActionListener { @Override public void actionPerformed(ActionEvent e) { System.out.println("aaaaaa"); }}多个按钮共享一个事件：
package com.kang.lesson2;import java.awt.*;import java.awt.event.*;public class TestActonEvent02 { public static void main(String[] args) { Frame frame = new Frame(); frame.setBounds(100, 100, 200, 200); frame.setBackground(new Color(196, 28, 28)); frame.setVisible(true); windowsClose(frame); Button button1 = new Button("button-start"); Button button2 = new Button("button-stop"); frame.add(button1,BorderLayout.NORTH); frame.add(button2,BorderLayout.SOUTH); // 在可以显示的定义，触发会返回的命令。如果不设置，则会走默认值 // 可以多个按钮，用一个监听类 button1.setActionCommand("start"); MyMonitor myMonitor = new MyMonitor(); button1.addActionListener(myMonitor); button2.addActionListener(myMonitor); } //关闭窗口 public static void windowsClose(Frame frame){ frame.addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); }}class MyMonitor implements ActionListener{ @Override public void actionPerformed(ActionEvent e) { //e.getActionCommand() 获得按钮的信息 System.out.println("按钮被点击了，输出的信息："+e.getActionCommand()); if (e.getActionCommand().equals("start")){ } }}2.5、输入框
package com.kang.lesson2;import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;public class TestText01 { public static void main(String[] args) { MyFrame myFrame = new MyFrame(); }}//class MyFrame extends Frame { public MyFrame() { TextField textField = new TextField(); add(textField); //监听这个文本框输入的文字 MyActionListener2 myActionListener2 = new MyActionListener2(); //按下enter键盘，就会触发这个输入框事件 textField.addActionListener(myActionListener2); //设置替换编码 textField.setEchoChar('$'); setVisible(true); pack(); }}class MyActionListener2 implements ActionListener{ @Override public void actionPerformed(ActionEvent e) { TextField field = (TextField) e.getSource();//获得一些资源，返回一个特定的对象 System.out.println(field.getText());//获得输入的文本框 field.setText("Love");//NULL "" }}2.6、简易计算器，组合+内部类回顾复习
oop原则：组合，大于继承！！！
class A{ public B b;}- 加法计算器
//设计一个简单的加法计算器package com.kang.lesson2;import java.awt.*;import java.awt.event.*;public class TestCalcu { public static void main(String[] args) { MyFrame2 myFrame2 = new MyFrame2("Calcu"); myFrame2.Penal(); }}//计算器显示class MyFrame2 extends Frame { //建立类的初始化参数 public MyFrame2(String title) { super(); setLayout(new FlowLayout()); setVisible(true); setBackground(new Color(239, 95, 30)); } public void Penal(){ //一个按钮 Button button1 = new Button("="); //一个标签 Label label = new Label("+"); TextField field1 = new TextField(10);//字符数 TextField field2 = new TextField(10); TextField field3 = new TextField(20); add(field1); add(label); add(field2); add(button1); add(field3); //最优化框架 pack(); //button动作事件监听 MyActionListener3 myActionListener3 = new MyActionListener3(field1, field2, field3); button1.addActionListener(myActionListener3); //窗口关闭 addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); }}class MyActionListener3 implements ActionListener{ //1. 获取三个变量的值，并转化为int类型 //2. 将加法运算后的结果，放到第三个框 //3. 清除前两个框 private TextField field1; private TextField field2; private TextField field3; public MyActionListener3(TextField field1,TextField field2,TextField field3) { this.field1 = field1; this.field2 = field2; this.field3 = field3; } @Override public void actionPerformed(ActionEvent e) { int n1 = Integer.parseInt(field1.getText()); int n2 = Integer.parseInt(field2.getText()); field1.setText(""); field2.setText(""); field3.setText(""+(n1+n2)); }}优化简易计算器代码(组合)
package com.dong.lesson1;import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;public class TestCalcu02 { public static void main(String[] args) { Calculator calculator = new Calculator(); calculator.loadCalculator(); }}//计算器class Calculator extends Frame{ //属性: TextField field1,field2,field3; //方法： public void loadCalculator(){ //设置 setBackground(new Color(2, 153, 22)); setLocation(100,100); setLayout(new FlowLayout()); setVisible(true); //组件 field1 = new TextField(10); field2 = new TextField(10); field3 = new TextField(20); Label label = new Label("+"); Button button = new Button("="); //监听 button.addActionListener(new myMonitor(this)); //布局 add(field1); add(label); add(field2); add(button); add(field3); //优化布局 pack(); }}//动作监听器class myMonitor implements ActionListener { //获取这个数据的对象，在一个类中组合另外一个类。 Calculator calculator =null; //构造器，初始化 public myMonitor(Calculator calculator) { this.calculator = calculator; } @Override public void actionPerformed(ActionEvent e) { int n1 = Integer.parseInt(calculator.field1.getText()); int n2 = Integer.parseInt(calculator.field2.getText()); calculator.field1.setText(""); calculator.field2.setText(""); calculator.field3.setText(""+(n1+n2)); }}再优化简计算器代码（完全改造为面向对象）
内部类：可以是实现更好的包装
package com.dong.lesson1;import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;public class TestCalcu02 { public static void main(String[] args) { Calculator calculator = new Calculator(); calculator.loadCalculator(); }}//计算器class Calculator extends Frame{ //属性: TextField field1,field2,field3; //方法： public void loadCalculator(){ //设置 setBackground(new Color(2, 153, 22)); setLocation(100,100); setLayout(new FlowLayout()); setVisible(true); //组件 field1 = new TextField(10); field2 = new TextField(10); field3 = new TextField(20); Label label = new Label("+"); Button button = new Button("="); //监听 button.addActionListener(new myMonitor()); //布局 add(field1); add(label); add(field2); add(button); add(field3); //优化布局 pack(); } //动作监听器 //内部类的最大好吃就是可以畅通无阻的访问外部类的属性 private class myMonitor implements ActionListener { @Override public void actionPerformed(ActionEvent e) { int n1 = Integer.parseInt(field1.getText()); int n2 = Integer.parseInt(field2.getText()); field1.setText(""); field2.setText(""); field3.setText(""+(n1+n2)); } }}2.7、画笔
package com.dong.lesson2;import java.awt.*;public class TestPaint { public static void main(String[] args) { MyPaint myPaint = new MyPaint(); myPaint.loadMyPaint(); }}class MyPaint extends Frame{ public void loadMyPaint(){ setBounds(100,100,400,500); setVisible(true); } //画笔 @Override public void paint(Graphics g) {// super.paint(g); //画笔，需要有颜色，画笔可以画画 g.setColor(Color.blue);// g.drawOval(100,100,100,100); g.fillOval(100,100,50,50); g.setColor(Color.RED); g.fillRect(150,150,100,150); //养成一个习惯，画笔用完，将画笔的颜色还原为最初的颜色 }}2.8、鼠标监听
目的：
package com.dong.lesson2;import java.awt.*;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;import java.util.ArrayList;import java.util.Iterator;public class TestMouseListener { public static void main(String[] args) { MyFrame frame = new MyFrame("画图"); }}// 鼠标监听的类class MyFrame extends Frame{ // 画画需要， // 底板（框架） // 需要画笔， // 需要见监听鼠标事件，从而获取鼠标的坐标，把坐标存起来() //画笔读取存储的点位，从而画画 ArrayList points; public MyFrame(String title) { super(title); setBounds(2,2,400,300); setVisible(true); points = new ArrayList<>(); addMouseListener(new MyMouseListener()); } @Override public void paint(Graphics g) { Iterator iterator=points.iterator(); while (iterator.hasNext()){ Point point = (Point) iterator.next(); g.setColor(new Color(93, 199, 49)); g.fillOval(point.x,point.y,10,10); } } //添加产生的村储存器中 public void AddPoint(Point point){ points.add(point); } class MyMouseListener extends MouseAdapter{ @Override public void mousePressed(MouseEvent e) { MyFrame frame = (MyFrame)e.getSource(); //把获得点，放在储存器中 AddPoint(new Point(e.getX(), e.getY())); frame.repaint(); } }}2.9、 窗口监听
package com.dong.lesson2;import java.awt.*;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;public class TestWindowListener { public static void main(String[] args) { new WindowFrame(); }}//窗口监听类class WindowFrame extends Frame{ public WindowFrame() { setVisible(true); setBackground(Color.cyan); setBounds(100,100,200,300); addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.out.println("windowClosing"); setVisible(false);//隐藏敞口 System.exit(0);//强制关闭窗口 } @Override public void windowActivated(WindowEvent e) { WindowFrame source = (WindowFrame) e.getSource(); source.setTitle("被激活了"); System.out.println("windowActivated"); } }); }}2.10、 键盘监听
package com.dong.lesson2;import java.awt.*;import java.awt.event.KeyAdapter;import java.awt.event.KeyEvent;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.io.FileReader;public class TestKeyListener { public static void main(String[] args) { new KeyFrame(); }}class KeyFrame extends Frame { public KeyFrame() { setVisible(true); setBounds(100,100,200,300); setBackground(Color.red); addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); addKeyListener(new MyKeyListener()); } class MyKeyListener extends KeyAdapter{ @Override public void keyPressed(KeyEvent e) { //获得按键的码 int keyCode = e.getKeyCode(); System.out.println(keyCode); if (keyCode == KeyEvent.VK_UP){ System.out.println("你按了上键"); } } }}3 Swing
3.1、窗口、面板
package com.dong.lesson3;import javax.swing.*;import java.awt.*;public class JFrameDemo { public void init(){ //JFrame是一个顶级窗口 JFrame jFrame = new JFrame("这是我们的jFrame窗口"); jFrame.setBackground(Color.red); jFrame.setBounds(100,100,200,200); jFrame.setVisible(true); //设置文字： JLabel jLabel = new JLabel("欢迎欢迎，热泪欢迎"); jFrame.add(jLabel); //让标签居中 jLabel.setHorizontalAlignment(SwingConstants.CENTER); //获得一个容器，设置容器背景 Container contentPane = jFrame.getContentPane(); contentPane.setBackground(Color.cyan); //关闭窗口事件 jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new JFrameDemo().init(); }}3.2、弹窗
JDialog，本身默认有关闭窗口
package com.dong.lesson3;import javax.swing.*;import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;public class JDialogDemo { public JDialogDemo() { JFrame jf = new JFrame(); jf.setVisible(true); jf.setSize(300,400); jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); Container content = jf.getContentPane(); content.setBackground(Color.cyan); //绝对布局 content.setLayout(null); //设置要给弹窗口按钮 JButton jButton = new JButton("蹦出弹窗"); jButton.setBounds(30,30,220,200); jButton.setBackground(Color.blue); content.add(jButton); //监听Button事件 jButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { //调用一个弹窗 new MyDialog(); } }); } public static void main(String[] args) { new JDialogDemo(); }}class MyDialog extends JDialog{ public MyDialog() { setVisible(true); setBackground(Color.BLUE); setBounds(100,100,200,300); Container container = this.getContentPane(); container.setLayout(null); JLabel label = new JLabel("这是个弹窗"); label.setBounds(20,20,80,80); container.add(label); }}3.3、标签
- label
new JLabel("xxxx");- 图标1：Icon
package com.kang.lesson3;import javax.swing.*;import java.awt.*;public class IconDemo extends JFrame implements Icon { private int height; private int width; //无参构造 public IconDemo() {} //无参构造 public IconDemo(int height,int width) { this.height = height; this.width = width; } public void init(){ //生成一个图标 IconDemo iconDemo = new IconDemo(15, 15); //图标放在标签的中间 JLabel iconTest = new JLabel("IconTest", iconDemo, SwingConstants.CENTER); //标签放在容器里面 Container contentPane = this.getContentPane(); this.add(iconTest); setVisible(true); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args){ new IconDemo().init(); } @Override public void paintIcon(Component c, Graphics g, int x, int y) { g.fillOval(x, y, height, width); } @Override public int getIconWidth() { return this.width; } @Override public int getIconHeight() { return this.height; }}- 图标2： ImageIcon
package com.kang.lesson3;import javax.swing.*;import java.awt.*;import java.net.URL;public class ImageIconDemo extends JFrame { public ImageIconDemo() { //获取图片的地址 URL url = ImageIconDemo.class.getResource("tx.jpg"); //生成一个标签 JLabel jLabel = new JLabel("ImageIcon"); //生成一个图片图标 ImageIcon imageIcon = new ImageIcon(url); //把图片图标放在label中 jLabel.setIcon(imageIcon); //设置标签位置 jLabel.setHorizontalAlignment(SwingConstants.CENTER); //把标签放在框架容器中 Container contentPane = getContentPane(); contentPane.add(jLabel); setVisible(true); setBounds(100, 100, 200, 200); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new ImageIconDemo(); }}3.4、面板
- JPanel
package com.kang.lesson4;import javax.swing.*;import java.awt.*;public class JPanelDemo extends JFrame { public JPanelDemo() { Container contentPane = this.getContentPane(); contentPane.setLayout(new GridLayout(2, 2,10,10)); JPanel panel1 = new JPanel(new GridLayout(1, 3)); JPanel panel2 = new JPanel(new GridLayout(2, 1)); JPanel panel3 = new JPanel(new GridLayout(1, 2)); JPanel panel4 = new JPanel(new GridLayout(2, 2)); panel1.add(new JButton("1")); panel1.add(new JButton("2")); panel1.add(new JButton("3")); panel2.add(new JButton("4")); panel2.add(new JButton("5")); panel3.add(new JButton("6")); panel3.add(new JButton("7")); panel4.add(new JButton("8")); panel4.add(new JButton("9")); panel4.add(new JButton("10")); panel4.add(new JButton("11")); contentPane.add(panel1); contentPane.add(panel2); contentPane.add(panel3); contentPane.add(panel4); setVisible(true); setBounds(100, 100, 300, 300); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new JPanelDemo(); }}- JScrollPanel(产生滚动窗口)
package com.kang.lesson4;import javax.swing.*;import java.awt.*;public class JScrollDemo extends JFrame { public JScrollDemo() { //获得容器 Container contentPane = getContentPane(); //生成文本域 JTextArea area = new JTextArea(); area.setText("花花你真美"); //生成一个滚动面板容器 JScrollPane panel = new JScrollPane(area); //大容器添加面板容器 contentPane.add(panel); setVisible(true); setBounds(50, 50, 400, 400); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new JScrollDemo(); }}3.5、按钮
- 图片按钮、
package com.kang.lesson4;import javax.swing.*;import java.awt.*;import java.net.URL;public class JButtonDemo01 extends JFrame { public JButtonDemo01() { //获得容器 Container contentPane = this.getContentPane(); //将一个图片变成一个图标 URL resource = JButtonDemo01.class.getResource("tx.jpg"); Icon icon = new ImageIcon(resource); JButton button = new JButton(); button.setIcon(icon); button.setToolTipText("1234567899"); contentPane.add(button); setVisible(true); setBounds(100, 100, 400, 400); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new JButtonDemo01(); }}- 单选框、
package com.kang.lesson4;import javax.swing.*;import java.awt.*;public class JButtonDemo02 extends JFrame { public JButtonDemo02() { Container contentPane = this.getContentPane(); //建立单选框按钮 JRadioButton button1 = new JRadioButton("button1"); JRadioButton button2 = new JRadioButton("button2"); JRadioButton button3 = new JRadioButton("button3"); //创建单选框条件 ButtonGroup buttonGroup = new ButtonGroup(); buttonGroup.add(button1); buttonGroup.add(button2); buttonGroup.add(button3); //添加按键到容器中 contentPane.add(button1,BorderLayout.NORTH); contentPane.add(button2,BorderLayout.CENTER); contentPane.add(button3,BorderLayout.SOUTH); setVisible(true); setBounds(100, 100, 400, 400); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new JButtonDemo02(); }}- 复选框
package com.kang.lesson4;import javax.swing.*;import java.awt.*;public class JButtonDemo02 extends JFrame { public JButtonDemo02() { Container contentPane = this.getContentPane(); //创建复选框 JCheckBox jCheckBox01 = new JCheckBox("jCheckBox01"); JCheckBox jCheckBox02 = new JCheckBox("jCheckBox02"); contentPane.add(jCheckBox01,BorderLayout.NORTH); contentPane.add(jCheckBox02,BorderLayout.SOUTH); setVisible(true); setBounds(100, 100, 400, 400); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new JButtonDemo02(); }}3.6、列表
- 下拉框
package com.dong.lesson4;import javax.swing.*;import java.awt.*;public class JComboboxDemo extends JFrame { public JComboboxDemo() { //获得一个容器 Container contentPane = getContentPane(); //生成一个下拉框模板 JComboBox comboBox = new JComboBox(); //再下拉框模板添加元素 comboBox.addItem("null"); comboBox.addItem("正在热映"); comboBox.addItem("已经下架"); comboBox.addItem("即将上映"); //将下拉框放到容器中 contentPane.add(comboBox); setVisible(true); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); setBounds(100,100,300,300); } public static void main(String[] args) { new JComboboxDemo(); }}- 列表框
package com.dong.lesson4;import javax.swing.*;import java.awt.*;import java.util.Vector;public class JComboboxDemo2 extends JFrame { public JComboboxDemo2() { //获得一个容器 Container contentPane = getContentPane();// //生成一个列表的内容：// String[] contents = {"1","2","3"}; Vector contents = new Vector(); //生成一个列表框 JList jList = new JList(contents); contents.add("大麻子"); contents.add("二狗子"); contents.add("大黑蛋"); contents.add("三毛"); //将下拉框放到容器中 contentPane.add(jList); setVisible(true); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); setBounds(100,100,300,300); } public static void main(String[] args) { new JComboboxDemo2(); }}- 应用场景
- 选择地区，或者一些单个选项
- 列表，展示信息，一般是动态扩容
3.7、文本框
- 文本框
package com.dong.lesson4;import javax.swing.*;import java.awt.*;public class TestTextDemo01 extends JFrame { public TestTextDemo01() { Container contentPane = getContentPane(); JTextField textField1 = new JTextField("hello",20); JTextField textField2 = new JTextField("world",20); contentPane.add(textField1,BorderLayout.NORTH); contentPane.add(textField2,BorderLayout.SOUTH); setVisible(true); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); setBounds(100,100,300,300); } public static void main(String[] args) { new TestTextDemo01(); }}- 密码框
package com.dong.lesson4;import javax.swing.*;import java.awt.*;public class TestTextDemo02 extends JFrame { public TestTextDemo02() { Container contentPane = getContentPane(); JPasswordField passwordField = new JPasswordField(); passwordField.setEchoChar('*'); contentPane.add(passwordField); setVisible(true); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); setBounds(100,100,300,300); } public static void main(String[] args) { new TestTextDemo02(); }}- 文本域
//生成文本域 JTextArea area = new JTextArea(); area.setText("花花你真美"); //生成一个滚动面板容器 JScrollPane panel = new JScrollPane(area); //大容器添加面板容器 contentPane.add(panel);四、贪吃蛇
帧，如果时间片足够小，就是动画，一秒30帧，连起来就是动画，拆开就是一张张静态的图片。
键盘监听
定时器 Timer
package com.kang.snake;import javax.swing.*;import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.KeyEvent;import java.awt.event.KeyListener;import java.util.Random;public class GamePanel extends JPanel implements KeyListener, ActionListener { //定义蛇的的数据结构 int length;//蛇的长度 int[] snakeX = new int[600];//蛇的x坐标空间 int[] snakeY = new int[500];//蛇的Y坐标空间 String fx; //头的方向 //游戏的状态：开始 or 暂停 Boolean isStart; //食物的坐标 int foodX; int foodY; Random random =new Random(); //游戏是否失败 Boolean isFail; //游戏得分 int score; //定时器 以毫秒为单位进行监听 1000ms = 1s Timer timer = new Timer(100,this); public GamePanel() { init(); //获得键盘和焦点事件 this.setFocusable(true); this.addKeyListener(this); timer.start(); } public void init(){ length =3; snakeX[0]=100;snakeY[0]=100;//脑袋坐标 snakeX[1]=75;snakeY[1]=100;//第一个身体坐标 snakeX[2]=50;snakeY[2]=100;//第二个身体坐标 fx = "right";//头的初始化方向 isStart = false;//游戏的初始化状态为暂停 isFail = false;//游戏初始化状态，成功 score = 0;//初始化得分为0； //初始化food位置 foodX = 25 + 25*random.nextInt(34); foodY = 75 + 25*random.nextInt(24); } @Override protected void paintComponent(Graphics g) { super.paintComponent(g);//刷新 this.setBackground(Color.WHITE); g.drawRect(25, 75, 850, 600); g.setColor(Color.BLACK); g.setFont(new Font("微软雅黑", Font.BOLD, 50)); g.drawString("欢迎来到贪吃蛇世界", 25, 60); //画得分 g.setColor(Color.CYAN); g.setFont(new Font("微软雅黑", Font.BOLD, 15)); g.drawString("你的得分："+ score, 600, 30); g.drawString("你的长度："+ length, 600, 60); if (fx.equals("right")){ Data.right.paintIcon(this, g, snakeX[0],snakeY[0]);//头部向右 }else if(fx.equals("left")){ Data.left.paintIcon(this, g, snakeX[0],snakeY[0]);//头部向左 }else if(fx.equals("up")){ Data.up.paintIcon(this, g, snakeX[0],snakeY[0]);//头部向左 }else if(fx.equals("down")){ Data.down.paintIcon(this, g, snakeX[0],snakeY[0]);//头部向左 }// Data.right.paintIcon(this, g, snakeX[0],snakeY[0]);//初始化头部向右// Data.body.paintIcon(this, g, snakeX[1],snakeY[1]);//初始化第一个身体// Data.body.paintIcon(this, g, snakeX[2],snakeY[2]);//初始化第二个身体 for (int i = 1; i < length; i++) { Data.body.paintIcon(this, g, snakeX[i],snakeY[i]);//初始化第二个身体 } //画出食物 Data.body.paintIcon(this, g, foodX, foodY); //游戏的状态 if (isStart == false){ g.setColor(Color.BLACK); g.setFont(new Font("微软雅黑", Font.BOLD, 35)); g.drawString("请按tab+空格键开始游戏", 300, 300); } if (isFail){ g.setColor(Color.RED); g.setFont(new Font("微软雅黑", Font.BOLD, 35)); g.drawString("失败+请按空格键开始游戏", 300, 300); } } //键盘监听事件 @Override public void keyPressed(KeyEvent e) { int keyCode = e.getKeyCode(); if (keyCode == KeyEvent.VK_SPACE){ if (isFail){ isFail = false; init(); } else { isStart = !isStart; } repaint(); } //小蛇脑袋变换方向 if (keyCode == KeyEvent.VK_UP){ fx = "up"; }else if (keyCode == KeyEvent.VK_DOWN){ fx = "down"; }else if (keyCode == KeyEvent.VK_LEFT){ fx = "left"; }else if (keyCode == KeyEvent.VK_RIGHT){ fx = "right"; } } //事件监听,-------通过固定事件来刷新，一秒十次 @Override public void actionPerformed(ActionEvent e) { //→右移动 if (isStart && isFail == false){ //身体移动 for (int i = length-1; i > 0; i--) { snakeX[i]=snakeX[i-1];//向前移动一点 snakeY[i]=snakeY[i-1];//向前移动一点 } //头部移动 if (fx.equals("right")){ snakeX[0]=snakeX[0]+25; if (snakeX[0]>850){ snakeX[0]=25; } } else if (fx.equals("left")){ snakeX[0]=snakeX[0]-25; if (snakeX[0]<25){ snakeX[0]=850; } } else if (fx.equals("up")){ snakeY[0]=snakeY[0]-25; if (snakeY[0]<75){ snakeY[0]=650; } } else if (fx.equals("down")){ snakeY[0]=snakeY[0]+25; if (snakeY[0]>650){ snakeY[0]=75; } } //吃食物 if (snakeX[0] == foodX && snakeY[0] ==foodY){ length++; foodX = 25 + 25*random.nextInt(34); foodY = 75 + 25*random.nextInt(24); score += 1; } // for (int i = 1; i < length; i++) { if (snakeX[0] == snakeX[i] && snakeY[0] == snakeY[i] ){ isFail = true; } } repaint();//重画页面 } timer.start(); } @Override public void keyReleased(KeyEvent e) { } @Override public void keyTyped(KeyEvent e) { }}//==================================package com.kang.snake;import javax.swing.*;import java.awt.*;public class StartGames { //绘制面板，我们所有的东西都用这个来画 public static void main(String[] args) { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); frame.setVisible(true); frame.setResizable(false); frame.setBounds(10, 10, 900, 720); frame.add(new GamePanel()); }}原文转载：http://www.shaoqun.com/a/784129.html
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