Lesson17：JAVA GUI
注
-
GUI核心技术：Swing、AWT
-
按住CTRL+鼠标左键才能进入类源码
AWT
Frame
package test;
import java.awt.*;
public class MyFrame extends Frame {
static int id = 1;
public MyFrame(int x,int y,int w,int h,Color color){
super("MyFrame"+(id++));
setLocation(x,y);
setSize(w,h);
setBackground(color);
setResizable(false);
setVisible(true);
}
public static void main(String[] args) {
MyFrame myFrame1 = new MyFrame(100, 100, 400, 400, Color.BLUE);
MyFrame myFrame2 = new MyFrame(500, 100, 400, 400, Color.BLACK);
MyFrame myFrame3 = new MyFrame(100, 500, 400, 400, Color.CYAN);
MyFrame myFrame4 = new MyFrame(500, 500, 400, 400, Color.GREEN);
System.out.println(id);
}
}
Panel
panel不能单独存在
package test;
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
public class TestPlane {
public static void main(String[] args) {
Frame frame = new Frame();
Panel panel = new Panel();
//设置布局（null为绝对布局）
frame.setLayout(null);
//坐标
frame.setBounds(50,100,500,400);
frame.setBackground(new Color(40,60,80));
//panel设置坐标，相对于frame
panel.setBounds(50,50,150,100);
panel.setBackground(new Color(80,15,6));
frame.add(panel);
frame.setVisible(true);
//添加监听事件
//适配器模式
frame.addWindowListener(new WindowAdapter() {
//窗口点击关闭的时候需要做的事情
@Override
public void windowClosing(WindowEvent e) {
//结束程序
System.exit(0);
}
});
}
}
布局管理器
-
流式布局（左-》右）
package test;
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
public class TestFlowLayout {
public static void main(String[] args) {
Frame frame = new Frame();
Button button1 = new Button("button1");
Button button2 = new Button("button1");
Button button3 = new Button("button1");
//默认中间
//frame.setLayout(new FlowLayout());
//frame.setLayout(new FlowLayout(FlowLayout.LEFT));
frame.setLayout(new FlowLayout(FlowLayout.RIGHT));
frame.setSize(500,500);
frame.add(button1);
frame.add(button2);
frame.add(button3);
frame.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
frame.setVisible(true);
}
}
-
东西南北中
package test;
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
public class TestBorderLayout {
public static void main(String[] args) {
Frame frame = new Frame();
Button east = new Button("East");
Button west = new Button("West");
Button south = new Button("South");
Button north = new Button("North");
Button center = new Button("Center");
frame.setSize(500,500);
frame.add(east,BorderLayout.EAST);
frame.add(west,BorderLayout.WEST);
frame.add(south,BorderLayout.SOUTH);
frame.add(north,BorderLayout.NORTH);
frame.add(center,BorderLayout.CENTER);
frame.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
frame.setVisible(true);
}
}
-
网格布局
package test;
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
public class TestGridLayout {
public static void main(String[] args) {
Frame frame = new Frame("GridLayout");
Button b1 = new Button("b1");
Button b2 = new Button("b2");
Button b3 = new Button("b3");
Button b4 = new Button("b4");
Button b5 = new Button("b5");
Button b6 = new Button("b6");
frame.setLayout(new GridLayout(2,3));
frame.setSize(500,500);
frame.add(b1);
frame.add(b2);
frame.add(b3);
frame.add(b4);
frame.add(b5);
frame.add(b6);
frame.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
//frame.pack(); //JAVA函数！作用是最优展示
frame.setVisible(true);
}
}
事件监听
package test.gui;
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 TestMonitor {
public static void main(String[] args) {
Frame frame = new Frame("多组件添加同一监听器");
Button start = new Button("start");
Button stop = new Button("stop");
MyMonitor myMonitor = new MyMonitor();
stop.setActionCommand("noStop-reset");
start.addActionListener(myMonitor);
stop.addActionListener(myMonitor);
frame.add(start,BorderLayout.NORTH);
frame.add(stop,BorderLayout.SOUTH);
frame.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
frame.pack();
frame.setVisible(true);
}
}
class MyMonitor implements ActionListener{
@Override
public void actionPerformed(ActionEvent e) {
System.out.println("您点击了=>"+e.getActionCommand()+"按钮");
}
}
简易计算器
最LOW的写法
package test.gui;
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 TestMyCalculator {
public static void main(String[] args) {
new MyCalculator();
}
}
class MyCalculator extends Frame{
public MyCalculator() throws HeadlessException {
TextField operator1 = new TextField(10);
TextField operator2 = new TextField(10);
TextField result = new TextField(20);
Button equalButton = new Button("=");
equalButton.addActionListener(new MyCalculatorActionListener(operator1,operator2,result));
Label plusLabel = new Label("+");
setLayout(new FlowLayout());
add(operator1);
add(plusLabel);
add(operator2);
add(equalButton);
add(result);
addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
pack();
setVisible(true);
}
}
class MyCalculatorActionListener implements ActionListener{
private TextField num1,num2,num3;
public MyCalculatorActionListener(TextField num1,TextField num2,TextField num3) {
this.num1=num1;
this.num2=num2;
this.num3=num3;
}
@Override
public void actionPerformed(ActionEvent e) {
//1.获取操作数一和操作数二
int opr1 = Integer.parseInt(num1.getText());
int opr2 = Integer.parseInt(num2.getText());
//2.把计算结果赋给操作数三
num3.setText(""+(opr1+opr2));
//3.清空操作数一和操作数二
num1.setText("");
num2.setText("");
}
}
面向对象写法
package test.gui;
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 TestMyCalculator {
public static void main(String[] args) {
new MyCalculator().openFrame();
}
}
class MyCalculator extends Frame{
TextField num1,num2,num3;
public void openFrame(){
num1 = new TextField(10);
num2 = new TextField(10);
num3 = new TextField(20);
Label plusLabel = new Label("+");
Button equalButton = new Button("=");
equalButton.addActionListener(new MyCalculatorActionListener(this));
addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
setLayout(new FlowLayout());
add(num1);
add(plusLabel);
add(num2);
add(equalButton);
add(num3);
pack();
setVisible(true);
}
}
class MyCalculatorActionListener implements ActionListener{
MyCalculator calculator;
public MyCalculatorActionListener(MyCalculator calculator) {
this.calculator = calculator;
}
@Override
public void actionPerformed(ActionEvent e) {
//1.获取操作数一和操作数二
int opr1 = Integer.parseInt(calculator.num1.getText());
int opr2 = Integer.parseInt(calculator.num2.getText());
//2.把计算结果赋给操作数三
calculator.num3.setText(""+(opr1+opr2));
//3.清空操作数一和操作数二
calculator.num1.setText("");
calculator.num2.setText("");
}
}
内部类写法
package test.gui;
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 TestMyCalculator {
public static void main(String[] args) {
new MyCalculator().openFrame();
}
}
class MyCalculator extends Frame{
TextField num1,num2,num3;
public void openFrame(){
num1 = new TextField(10);
num2 = new TextField(10);
num3 = new TextField(20);
Label plusLabel = new Label("+");
Button equalButton = new Button("=");
equalButton.addActionListener(new MyCalculatorActionListener());
addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
setLayout(new FlowLayout());
add(num1);
add(plusLabel);
add(num2);
add(equalButton);
add(num3);
pack();
setVisible(true);
}
private class MyCalculatorActionListener implements ActionListener{
@Override
public void actionPerformed(ActionEvent e) {
int opr1 = Integer.parseInt(num1.getText());
int opr2 = Integer.parseInt(num2.getText());
num3.setText(""+(opr1+opr2));
num1.setText("");
num2.setText("");
}
}
}
画笔
package test.gui;
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
public class TestPaint {
public static void main(String[] args) {
new MyPaint().loadFrame();
}
}
class MyPaint extends Frame{
public void loadFrame(){
addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
setBounds(200,200,600,480);
setVisible(true);
}
@Override
public void paint(Graphics g) {
//super.paint(g);
g.setColor(Color.red);
//g.drawOval(200,200,150,150);
g.fillOval(150,150,150,150);
g.setColor(Color.green);
g.fillRect(200,300,200,200);
}
}
鼠标监听
package test.gui;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.ArrayList;
import java.util.Iterator;
public class TestMouseListener {
public static void main(String[] args) {
new MyMouseListenerFrame("画图");
}
}
class MyMouseListenerFrame extends Frame{
ArrayList points;
public MyMouseListenerFrame(String title) throws HeadlessException {
super(title);
points = new ArrayList<>();
addMouseListener(new MyMouseListener());
addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
setBounds(200,200,600,500);
setVisible(true);
}
@Override
public void paint(Graphics g) {
Iterator iterator = points.iterator();
while (iterator.hasNext()){
Point point = (Point)iterator.next();
g.setColor(Color.BLACK);
g.fillOval(point.x,point.y,10,10);
}
}
//添加一个点到界面上
public void addPaint(Point point){
points.add(point);
}
//适配器模式
private class MyMouseListener extends MouseAdapter{
@Override
public void mousePressed(MouseEvent e) {
MyMouseListenerFrame mmlf = (MyMouseListenerFrame)e.getSource();
mmlf.addPaint(new Point(e.getX(),e.getY()));
mmlf.repaint();
}
}
}
窗口监听
addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
@Override
public void windowActivated(WindowEvent e) {
MyMouseListenerFrame mmlf = (MyMouseListenerFrame)e.getSource();
mmlf.setTitle("窗口被激活了");
System.out.println("windowActivated");
}
});
键盘监听
package test.gui;
import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
public class TestKeyListener {
public static void main(String[] args) {
new MyKeyFrame();
}
}
class MyKeyFrame extends Frame{
public MyKeyFrame() throws HeadlessException {
setBounds(100,100,600,500);
addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
int keyCode = e.getKeyCode();
System.out.println(keyCode);
if(keyCode == KeyEvent.VK_UP){
System.out.println("你按了上键");
}
}
});
addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
setVisible(true);
}
}
Swing
注
AWT是基础，Swing是封装过的
窗口、面板
package test.swing;
import javax.swing.*;
import java.awt.*;
public class TestSwingDemo {
public void init(){
JFrame jFrame = new JFrame();
jFrame.setBounds(100,100,600,500);
JLabel jLabel = new JLabel("文字");
jLabel.setHorizontalAlignment(SwingConstants.CENTER);
jFrame.add(jLabel);
Container container = jFrame.getContentPane();
container.setBackground(Color.CYAN);
jFrame.setVisible(true);
jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new TestSwingDemo().init();
}
}
弹窗
package test.swing;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class DialogDemo extends JFrame {
public DialogDemo() throws HeadlessException {
setSize(600,500);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
Container container = getContentPane();
container.setLayout(null);
JButton jButton = new JButton("弹出一个新窗口");
jButton.setBounds(50,50,150,50);
jButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
new MyDialogDemo();
}
});
container.add(jButton);
setVisible(true);
}
public static void main(String[] args) {
new DialogDemo();
}
}
class MyDialogDemo extends JDialog{
public MyDialogDemo() {
setBounds(100,100,520,480);
setVisible(true);
Container container = getContentPane();
container.setLayout(null);
JLabel jLabel = new JLabel("这是个弹窗");
jLabel.setSize(150,50);
jLabel.setHorizontalAlignment(SwingConstants.CENTER);
container.add(jLabel);
}
}
Icon、ImageIcon标签
package test.swing;
import javax.swing.*;
import java.awt.*;
public class IconDemo extends JFrame implements Icon {
private int width;
private int height;
public IconDemo(){}
public IconDemo(int width,int height){
this.width=width;
this.height=height;
}
public void init(){
IconDemo iconDemo = new IconDemo(10, 10);
JLabel jLabel = new JLabel("icontest", iconDemo, SwingConstants.CENTER);
Container container = getContentPane();
container.add(jLabel);
setVisible(true);
setBounds(100,100,600,500);
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,width,height);
}
@Override
public int getIconWidth() {
return width;
}
@Override
public int getIconHeight() {
return height;
}
}
package test.swing;
import javax.swing.*;
import java.awt.*;
import java.net.URL;
public class ImageIconDemo extends JFrame {
public ImageIconDemo() throws HeadlessException {
JLabel jLabel = new JLabel("imageIcon");
URL url = ImageIconDemo.class.getResource("dnfgirl1.jpg");
ImageIcon imageIcon = new ImageIcon(url);
jLabel.setIcon(imageIcon);
jLabel.setHorizontalAlignment(SwingConstants.CENTER);
Container container = getContentPane();
container.add(jLabel);
setVisible(true);
setBounds(100,100,600,500);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new ImageIconDemo();
}
}
面板与文本域
package test.swing;
import javax.swing.*;
import java.awt.*;
public class JScrollDemo extends JFrame {
public JScrollDemo() {
JTextArea jTextArea = new JTextArea(20, 20);
jTextArea.setText("这是文本域");
JScrollPane jScrollPane = new JScrollPane(jTextArea);
Container container = getContentPane();
container.add(jScrollPane);
setVisible(true);
setBounds(100,100,600,500);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new JScrollDemo();
}
}
按钮
单选按钮
package test.swing;
import javax.swing.*;
import java.awt.*;
import java.net.URL;
public class JRadioButtonDemo extends JFrame {
public JRadioButtonDemo() throws HeadlessException {
Container container = getContentPane();
URL resource = JRadioButtonDemo.class.getResource("dnfgirl1.jpg");
Icon icon = new ImageIcon(resource);
JRadioButton jRadioButton01 = new JRadioButton("按钮I");
JRadioButton jRadioButton02 = new JRadioButton("按钮II");
JRadioButton jRadioButton03 = new JRadioButton("按钮III");
ButtonGroup buttonGroup = new ButtonGroup();
buttonGroup.add(jRadioButton01);
buttonGroup.add(jRadioButton02);
buttonGroup.add(jRadioButton03);
container.add(jRadioButton01,BorderLayout.NORTH);
container.add(jRadioButton02,BorderLayout.CENTER);
container.add(jRadioButton03,BorderLayout.SOUTH);
setVisible(true);
setBounds(100,100,600,500);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new JRadioButtonDemo();
}
}
复选按钮
package test.swing;
import javax.swing.*;
import java.awt.*;
import java.net.URL;
public class JCheckBoxDemo extends JFrame {
public JCheckBoxDemo() throws HeadlessException {
Container container = getContentPane();
URL resource = JRadioButtonDemo.class.getResource("dnfgirl1.jpg");
Icon icon = new ImageIcon(resource);
JCheckBox jCheckBox1 = new JCheckBox("复选框I");
JCheckBox jCheckBox2 = new JCheckBox("复选框II");
container.add(jCheckBox1,BorderLayout.NORTH);
container.add(jCheckBox2,BorderLayout.SOUTH);
setVisible(true);
setBounds(100,100,600,500);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new JCheckBoxDemo();
}
}
下拉框与列表框
package test.swing;
import javax.swing.*;
import java.awt.*;
public class JComboBoxDemo extends JFrame {
public JComboBoxDemo() throws HeadlessException {
Container container = getContentPane();
JComboBox jComboBox = new JComboBox();
jComboBox.addItem(null);
jComboBox.addItem("已完成");
jComboBox.addItem("进行中");
jComboBox.addItem("计划阶段");
container.add(jComboBox);
setVisible(true);
setBounds(100,100,600,500);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new JComboBoxDemo();
}
}
package test.swing;
import javax.swing.*;
import java.awt.*;
import java.util.Vector;
public class JListDemo extends JFrame {
public JListDemo() throws HeadlessException {
Container container = getContentPane();
//String[] data = {"1","2","3"};
Vector datas = new Vector();
JList jList = new JList(datas);
datas.add("张三");
datas.add("李四");
datas.add("王五");
container.add(jList);
setVisible(true);
setBounds(100,100,600,500);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new JListDemo();
}
}
文本框与密码框
package test.swing;
import javax.swing.*;
import java.awt.*;
public class JTextFieldAndJPasswordFieldDemo extends JFrame {
public JTextFieldAndJPasswordFieldDemo() throws HeadlessException {
Container container = getContentPane();
container.setLayout(new FlowLayout());
JTextField jTextField1 = new JTextField("文本框I");
JTextField jTextField2 = new JTextField("文本框II",20);
JPasswordField passwordField = new JPasswordField();
passwordField.setEchoChar('*');
container.add(jTextField1);
container.add(jTextField2);
container.add(passwordField);
setVisible(true);
setBounds(100,100,600,500);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new JTextFieldAndJPasswordFieldDemo();
}
}
游戏实战
贪吃蛇
package test.snake;
import javax.swing.*;
import java.net.URL;
public class Data {
public static URL headURL = Data.class.getResource("head.png");
public static ImageIcon head = new ImageIcon(headURL);
public static URL headDownURL = Data.class.getResource("head-down.png");
public static URL headUpURL = Data.class.getResource("head-up.png");
public static URL headLeftURL = Data.class.getResource("head-left.png");
public static URL headRightURL = Data.class.getResource("head-right.png");
public static ImageIcon headDown = new ImageIcon(headDownURL);
public static ImageIcon headUp = new ImageIcon(headUpURL);
public static ImageIcon headLeft = new ImageIcon(headLeftURL);
public static ImageIcon headRight = new ImageIcon(headRightURL);
public static URL bodyURL = Data.class.getResource("body.png");
public static ImageIcon body = new ImageIcon(bodyURL);
public static URL foodURL = Data.class.getResource("food.png");
public static ImageIcon food = new ImageIcon(foodURL);
// public static void main(String[] args) {
// if(headURL==null){
// System.out.println("图片路径不正确:"+headURL.toString());
// }else{
// System.out.println("图片路径正确");
// }
// }
}
package test.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 {
int length = 0;
int[] snakeX = new int[600];
int[] snakeY = new int[500];
String fx;
boolean isStart = false;
boolean isFail = false;
int foodx;
int foody;
Random random = new Random();
int score;
Timer timer = new Timer(500,this);
public GamePanel() {
init();
setFocusable(true);
addKeyListener(this);
timer.start();
}
public void init() {
length = 3;
snakeX[0] = 300;
snakeY[0] = 250;
snakeX[1] = 200;
snakeY[1] = 250;
snakeX[2] = 100;
snakeY[2] = 250;
fx = "R";
foodx = 100 + 100*random.nextInt(20);
foody = 100 + 100*random.nextInt(20);
score = 0;
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g); //清屏
this.setBackground(Color.WHITE);
Data.head.paintIcon(this, g, 25, 11);
g.fillRect(25, 250, 1025, 660);
g.setColor(Color.white);
g.setFont(new Font("微软雅黑",Font.BOLD,20));
g.drawString("长度 "+length,800,40);
g.drawString("分数 "+score,800,60);
Data.food.paintIcon(this,g,foodx,foody);
if (fx.equals("R")) {
Data.headRight.paintIcon(this, g, snakeX[0], snakeY[0]);
} else if (fx.equals("L")) {
Data.headLeft.paintIcon(this, g, snakeX[0], snakeY[0]);
} else if (fx.equals("U")) {
Data.headUp.paintIcon(this, g, snakeX[0], snakeY[0]);
} else if (fx.equals("D")) {
Data.headDown.paintIcon(this, g, snakeX[0], snakeY[0]);
}
for (int i = 1; i < length; i++) {
Data.body.paintIcon(this, g, snakeX[i], snakeY[i]);
}
if (isStart == false) {
g.setColor(Color.white);
g.setFont(new Font("微软雅黑", Font.BOLD, 50));
g.drawString("按下空格开始游戏！", 300, 500);
}
if (isFail) {
g.setColor(Color.red);
g.setFont(new Font("微软雅黑", Font.BOLD, 50));
g.drawString("失败！按空格重新开始", 300, 500);
}
}
@Override
public void keyTyped(KeyEvent e) {}
@Override
public void keyPressed(KeyEvent e) {
int keyCode = e.getKeyCode();
if(keyCode==KeyEvent.VK_SPACE){
if(isFail){
isFail = false;
init();
}else {
isStart = !isStart;
}
repaint();
}
if(keyCode==KeyEvent.VK_UP){
fx="U";
}else if(keyCode==KeyEvent.VK_DOWN){
fx="D";
}else if(keyCode==KeyEvent.VK_LEFT){
fx="L";
}else if(keyCode==KeyEvent.VK_RIGHT){
fx="R";
}
//repaint();
}
@Override
public void keyReleased(KeyEvent e) {}
@Override
public void actionPerformed(ActionEvent e) {
if(isStart && isFail==false){
if(snakeX[0]-foodx<50 && snakeY[0]-foody<50){
length++;
score+=10;
foodx = 100 + 100*random.nextInt(4);
foody = 100 + 100*random.nextInt(4);
}
for (int i = length-1;i>0;i--){
snakeX[i] = snakeX[i-1];
snakeY[i] = snakeY[i-1];
}
if(fx.equals("R")){
snakeX[0] = snakeX[0]+100;
if(snakeX[0]>1000){ snakeX[0] = 25; }
}else if(fx.equals("L")){
snakeX[0] = snakeX[0]-100;
if(snakeX[0]<25){ snakeX[0] = 1000; }
}else if(fx.equals("U")){
snakeY[0] = snakeY[0]-100;
if(snakeY[0]<200){ snakeY[0] = 800; }
}else if(fx.equals("D")){
snakeY[0] = snakeY[0]+100;
if(snakeY[0]>800){ snakeY[0] = 200; }
}
for (int i=1;i<length;i++){
if(snakeX[0]==snakeX[i]&&snakeY[0]==snakeY[i]){
isFail = true;
}
}
repaint();
}
timer.start();
}
}
package test.snake;
import javax.swing.*;
public class StartGame {
public static void main(String[] args) {
JFrame jFrame = new JFrame();
jFrame.add(new GamePanel());
jFrame.setResizable(false); //设置窗口大小不可变
jFrame.setBounds(10,10,1095,1000);
jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
jFrame.setVisible(true);
}
}
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