GUI编程

组件

  • 窗口
  • 弹窗
  • 面板
  • 文本框
  • 列表框
  • 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

  1. 因为界面不美观
  2. 需要jre环境!

为什么我们要学习?

1.可以写出自己心中想要的一些小工具

2.了解MVC架构,了解监听!

2.AWT

2.1Awt介绍

  1. 包含了很多类和接口!GUI:图形用户界面
  2. 元素:窗口,按钮,文本框
  3. java.awt

2.2组件和容器

1.frame

import java.awt.*;
public class gui {
    public static void main(String[] args) {
        Frame frame = new Frame("我的第一个Java图像界面窗口");

        //需要设置可见性
        frame.setVisible(true);

        //设置窗口大小
        frame.setSize(400,400);

        //设置背景颜色
        frame.setBackground(new Color(1,1,1));

        //弹出的初始位置
        frame.setLocation(200,200);

        //设置大小固定
        frame.setResizable(false);


    }
}
//此时无法关闭弹窗只有关闭java程序

尝试回顾封装

import java.awt.*;

public class TestFrame2 {
    public static void main(String[] args) {
        //展示多个窗口
        MyFrame myFrame1 = new MyFrame(100,100,200,200,Color.blue);
        MyFrame myFrame2 = new MyFrame(300,100,200,200,Color.black);
        MyFrame myFrame3 = new MyFrame(100,300,200,200,Color.red);
        MyFrame myFrame4 = new MyFrame(300,300,200,200,Color.yellow);
    }
}

class MyFrame extends Frame{
    static int id = 0;

    public MyFrame(int x,int y,int w,int h,Color color){
        super("MyFrame+"+(++id));
        setBackground(color);
        setBounds(x,y,w,h);
        setVisible(true);
    }

}

2.面板Panel

//解决了关闭事件!
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

//Panel 可以看成是一个空间,但是不能单独存在
public class TestPanel {
    public static void main(String[] args) {
        Frame frame = new Frame();
        Panel panel = new Panel();

        //设置布局
        frame.setLayout(null);

        frame.setBounds(300,300,500,500);
        frame.setBackground(new Color(40,161,35));

        //panel设置坐标,相对于frame
        panel.setBounds(50,50,400,400);
        panel.setBackground(new Color(193,15,60));

        frame.add(panel);

        frame.setVisible(true);

        //监听事件,监听窗口关闭事件
        //适配器模式
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

2.3.布局管理器

  • 流式布局
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");

        //设置为流式布局
        //frame.setLayout(new FlowLayout());
        //frame.setLayout(new FlowLayout(FlowLayout.LEFT));
        frame.setLayout(new FlowLayout(FlowLayout.RIGHT));

        frame.setSize(200,200);

        //把按钮添加上去
        frame.add(button1);
        frame.add(button2);
        frame.add(button3);

        frame.setVisible(true);
    }
}
  • 东西南北中
import java.awt.*;

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.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.setSize(200,200);
        frame.setVisible(true);

    }
}
  • 表格布局
import java.awt.*;

public class TestGridLayout {
    public static void main(String[] args) {
        Frame frame = new Frame();

        Button btn1 = new Button("btn1");
        Button btn2 = new Button("btn2");
        Button btn3 = new Button("btn3");
        Button btn4 = new Button("btn4");
        Button btn5 = new Button("btn5");
        Button btn6 = new Button("btn6");

        frame.setLayout(new GridLayout(3,2));

        frame.add(btn1);
        frame.add(btn2);
        frame.add(btn3);
        frame.add(btn4);
        frame.add(btn5);
        frame.add(btn6);

        frame.pack();//自适应
        frame.setVisible(true);
    }
}

总结:

  1. Frame是一个顶级窗口
  2. Panel无法单独显示,必须添加到某个容器中
  3. 布局管理器
  1. 流式
  2. 东西南北中
  3. 表格
  1. 大小,定位,背景颜色,可见性,监听

2.4.事件监听

事件监听:当某个事件发生的时候,干什么?

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 TestActionEvent {
    public static void main(String[] args) {
        Frame frame = new Frame();
        Button button = new Button();

        //因为addActionListener()需要一个ActionListener,所以我们需要构造一个ActionListener
        MyActionListener myActionListener = new MyActionListener();
        button.addActionListener(myActionListener);

        frame.add(button,BorderLayout.CENTER);
        frame.pack();//自适应

        windowCloser(frame);//关闭窗口
        frame.setVisible(true);
    }

    private static void windowCloser(Frame frame){
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

class MyActionListener implements ActionListener{

    @Override
    public void actionPerformed(ActionEvent e) {
        System.out.println("aaa");
    }
}

多个按钮,共享一个事件

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 TestActionTwo {
    public static void main(String[] args) {
        //两个按钮实现同一个监听
        //开始    停止
        Frame frame = new Frame("开始-停止");
        Button button1 = new Button("start");
        Button button2 = new Button("stop");

        button2.setActionCommand("button2-stop");

        MyMonitor myMonitor = new MyMonitor();

        button1.addActionListener(myMonitor);
        button2.addActionListener(myMonitor);

        frame.add(button1,BorderLayout.NORTH);
        frame.add(button2,BorderLayout.SOUTH);

        frame.pack();
        frame.setVisible(true);

        windowCloser(frame);
    }

    private static void windowCloser(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) {
        System.out.println("按钮被点击了:msg"+e.getActionCommand());
    }
}

2.5.输入框TextField

import javax.swing.*;import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;public class TestText01 {    public static void main(String[] args) {        //启动!        new MyFrame1();    }}class MyFrame1 extends Frame{    public MyFrame1(){        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就会触发这个输入框的事件        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,返回的一个对象        System.out.println(field.getText());        field.setText("");    }}

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!

面向对象的写法(运用组合降低了耦合性)

import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;//简易计算器public class TestCalc {    public static void main(String[] args) {        new Calculator().loadFrame();    }}//计算器类class Calculator extends Frame{    //属性    TextField num1,num2,num3;    //方法    public void loadFrame(){        num1 = new TextField(10);//最大字符数        num2 = new TextField(10);//最大字符数        num3 = new TextField(20);//最大字符数        Button button = new Button("=");        Label label = new Label("+");        button.addActionListener(new MyCalculatorListener(this));        setLayout(new FlowLayout());        add(num1);        add(label);        add(num2);        add(button);        add(num3);        pack();        setVisible(true);    }}class MyCalculatorListener implements ActionListener {    Calculator calculator = null;    public MyCalculatorListener(Calculator calculator){        this.calculator = calculator;    }    @Override    public void actionPerformed(ActionEvent e) {        int n1 = Integer.parseInt(calculator.num1.getText());        int n2 = Integer.parseInt(calculator.num2.getText());        calculator.num3.setText(""+(n1+n2));        calculator.num1.setText("");        calculator.num2.setText("");    }}

内部类:

  • 更好的包装
import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;//简易计算器public class TestCalc {    public static void main(String[] args) {        new Calculator().loadFrame();    }}//计算器类class Calculator extends Frame{    //属性    TextField num1,num2,num3;    //方法    public void loadFrame(){        num1 = new TextField(10);//最大字符数        num2 = new TextField(10);//最大字符数        num3 = new TextField(20);//最大字符数        Button button = new Button("=");        Label label = new Label("+");        button.addActionListener(new MyCalculatorListener());        setLayout(new FlowLayout());        add(num1);        add(label);        add(num2);        add(button);        add(num3);        pack();        setVisible(true);    }    class MyCalculatorListener implements ActionListener {        @Override        public void actionPerformed(ActionEvent e) {            int n1 = Integer.parseInt(num1.getText());            int n2 = Integer.parseInt(num2.getText());            num3.setText(""+(n1+n2));            num1.setText("");            num2.setText("");        }    }}

2.7画笔

package 画笔;import java.awt.*;public class TestPaint {    public static void main(String[] args) {        new MyPaint().loadFrame();    }}class MyPaint extends Frame {    public void loadFrame(){        setBounds(200,200,600,500);        setVisible(true);    }    //画笔    public void paint(Graphics g){        //画笔,需要有颜色,画笔可以画画//        g.setColor(Color.red);        g.drawOval(100,100,100,100);//        g.fillOval(0,0,50,50);//        g.setColor(Color.green);        g.fillRect(150,200,200,200);        //养成习惯,画笔用完,将他还原到最初的颜色    }}

2.8.鼠标监听

实现鼠标点击画画

package 画笔;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) {        new MyFrame("画图");    }}class MyFrame extends Frame{    //画画需要画笔,需要监听鼠标当前的位置,需要集合来存储这个点    ArrayList points;    public MyFrame(String title){        super(title);        setBounds(200,200,400,300);        //存鼠标点击的点        points = new ArrayList<>();        setVisible(true);        //鼠标监听器,正对这个窗口        this.addMouseListener(new MyMouseListener());    }    @Override    public void paint(Graphics g) {        //画画,监听鼠标的事件        Iterator iterator = points.iterator();        while(iterator.hasNext()){            Point point = (Point) iterator.next();            g.setColor(Color.blue);            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{        //鼠标,按下,弹起,按住不放        @Override        public void mousePressed(MouseEvent e) {            MyFrame frame = (MyFrame) e.getSource();            //这个我们点击的时候就会在界面上产生一个点!画            //这个点就是鼠标的点;            frame.addPaint(new Point(e.getX(),e.getY()));            //每次点击鼠标都需要重新画一遍            frame.repaint();//刷新        }    }}

2.9.窗口监听

package 画笔;import java.awt.*;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;public class TestWindows {    public static void main(String[] args) {        new WindowFrame();    }}class WindowFrame extends Frame{    public WindowFrame(){        setBackground(Color.blue);        setBounds(100,100,200,200);        setVisible(true);        this.addWindowListener(            //匿名内部类            new WindowAdapter(){                @Override                public void windowClosing(WindowEvent e) {                    System.out.println("WindowClosing");                    System.exit(0);                }                @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 画笔;import java.awt.*;import java.awt.event.KeyAdapter;import java.awt.event.KeyEvent;public class TestKeyListener {    public static void main(String[] args) {        new KeyFrame();    }}class KeyFrame extends Frame {    public KeyFrame(){        setBounds(1,2,300,400);        setVisible(true);        this.addKeyListener(new KeyAdapter() {            @Override            public void keyPressed(KeyEvent e) {                //获得键盘下的键是哪一个,当前的码                int keyCode = e.getKeyCode();//不需要去记录这个数值,直接使用静态属性                System.out.println(keyCode);                if(keyCode == KeyEvent.VK_UP){                    System.out.println("你按下了上建");                }                //根据不同操作产生不同结果            }        });    }}

3.Swing

3.1.窗口、面板

package Swing;import javax.swing.*;import java.awt.*;public class JFrameDemo {    //初始化    public void init(){        JFrame jf = new JFrame("这是一个JFrame窗口");        jf.setVisible(true);        jf.setBounds(100,100,200,200);        jf.setBackground(Color.blue);        //设置文字Jlabel        JLabel label = new JLabel("欢迎来到zzk的javaGUI");        jf.add(label);        //关闭事件        jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);    }    public static void main(String[] args) {        //建立一个窗口        new JFrameDemo().init();    }}

标签居中

package Swing;import javax.swing.*;import java.awt.*;public class JframeDemo02 {    public static void main(String[] args) {        new MyJframe2().init();    }}class MyJframe2 extends JFrame{    public void init(){        this.setBounds(10,10,200,300);        this.setVisible(true);        JLabel label = new JLabel("欢迎来到zzk的JAVAGUI");        this.add(label);        //让文本标签居中,设置水平对齐        label.setHorizontalAlignment(SwingConstants.CENTER);        //获得一个容器        Container container = this.getContentPane();        container.setBackground(Color.blue);    }}

3.2.弹窗

JDialog,用来被弹出,默认就有关闭事件!

package Swing;import javax.swing.*;import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;public class DialogDemo extends JFrame {    public DialogDemo() {        this.setVisible(true);        this.setSize(700,500);        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);        //JFrame 放东西,容器        Container container = this.getContentPane();        //绝对布局        container.setLayout(null);        //按钮        JButton button = new JButton("点击弹出一个对话框");        button.setBounds(30,30,200,50);        //点击这个按钮的时候,弹出一个弹窗        button.addActionListener(new ActionListener() {            @Override            public void actionPerformed(ActionEvent e) {                //弹窗                new MyDialogDemo();            }        });        container.add(button);    }    public static void main(String[] args) {        new DialogDemo();    }}//弹窗的窗口class MyDialogDemo extends JDialog{    public MyDialogDemo(){        this.setVisible(true);        this.setBounds(100,100,500,500);        Container container = this.getContentPane();        container.setLayout(null);        container.add(new Label("JavaGUI学习"));    }}

3.3.标签

label

new JLabel("xxx")

图标ICON

package Swing;import javax.swing.*;import java.awt.*;//图标,需要实现类,Frame继承public class IconDemo extends JFrame implements Icon {    private int width;    private int height;    public IconDemo(){}//无参构造    public IconDemo(int width,int height){        this.width = width;        this.height = height;    }    public void init(){        IconDemo iconDemo = new IconDemo(15,15);        //把图标放在标签上,也可以放在按钮!        JLabel label1 = new JLabel("icontest",iconDemo,SwingConstants.CENTER);        Container container = getContentPane();        container.add(label1);        this.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,width,height);    }    @Override    public int getIconWidth() {        return this.width;    }    @Override    public int getIconHeight() {        return this.height;    }}

图片Icon

package Swing;import javax.swing.*;import java.awt.*;import .*;class ImageIconDemo extends JFrame {    public ImageIconDemo(){        //获取图片的地址        JLabel label = new JLabel("ImageIcon");        URL url = ImageIconDemo.class.getResource("../Swing/result.png");        ImageIcon imageIcon = new ImageIcon(url);        label.setIcon(imageIcon);        label.setHorizontalAlignment(SwingConstants.CENTER);        Container container = getContentPane();        container.add(label);        setVisible(true);        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);        setBounds(100,100,200,200);    }    public static void main(String[] args) {        new ImageIconDemo();    }}

3.4.面板

JPanel

package Swing;import javax.swing.*;import java.awt.*;public class JPanelDemo extends JFrame {    public JPanelDemo(){        Container container = this.getContentPane();        container.setLayout(new GridLayout(2,1,10,10));//后面的参数的意思,间距        JPanel panel1 = new JPanel(new GridLayout(1,3));        JPanel panel2 = new JPanel(new GridLayout(1,2));        JPanel panel3 = new JPanel(new GridLayout(2,1));        JPanel panel4 = new JPanel(new GridLayout(3,2));        panel1.add(new JButton("1"));        panel1.add(new JButton("1"));        panel2.add(new JButton("2"));        panel2.add(new JButton("2"));        panel3.add(new JButton("3"));        panel3.add(new JButton("3"));        panel4.add(new JButton("4"));        panel4.add(new JButton("4"));        panel4.add(new JButton("4"));        panel4.add(new JButton("4"));        panel4.add(new JButton("4"));        panel4.add(new JButton("4"));        container.add(panel1);        container.add(panel2);        container.add(panel3);        container.add(panel4);        this.setVisible(true);        this.setSize(500,500);        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);    }    public static void main(String[] args) {        new JPanelDemo();    }}

JScrollPanel

package Swing;import javax.swing.*;import java.awt.*;public class JScrollDemo extends JFrame {    public JScrollDemo(){        Container container = this.getContentPane();        //文本域        JTextArea textArea = new JTextArea(20,50);        textArea.setText("JAVAGUI学习");        //Scroll面板        JScrollPane scrollPane = new JScrollPane(textArea);        container.add(scrollPane);        this.setVisible(true);        this.setBounds(100,100,300,350);        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);    }    public static void main(String[] args) {        new JScrollDemo();    }}

3.5.按钮

图片按钮

package Swing;import java.awt.*;import .URL;import javax.swing.*;public class JButtonDemo01 extends JFrame {    public JButtonDemo01(){        Container container = this.getContentPane();        //将一个图片变成图标        URL resource = JButtonDemo01.class.getResource("../Swing/result.png");        Icon icon = new ImageIcon(resource);        //把这个图标放在按钮上        JButton button = new JButton();        button.setIcon(icon);        button.setToolTipText("图片按钮");        //add        container.add(button);        this.setVisible(true);        this.setSize(500,300);        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);    }    public static void main(String[] args) {        new JButtonDemo01();    }}
  • 单选按钮
package Swing;import java.awt.*;import .URL;import javax.swing.*;public class JButtonDemo02 extends JFrame {    public JButtonDemo02(){        Container container = this.getContentPane();        //将一个图片变成图标        URL resource = JButtonDemo01.class.getResource("../Swing/result.png");        Icon icon = new ImageIcon(resource);        //单选框        JRadioButton radioButton1 = new JRadioButton("JRadioButton01");        JRadioButton radioButton2 = new JRadioButton("JRadioButton02");        JRadioButton radioButton3 = new JRadioButton("JRadioButton03");        //由于单选框中只能选择一个,分组,一组中只能选择一个        ButtonGroup group = new ButtonGroup();        group.add(radioButton1);        group.add(radioButton2);        group.add(radioButton3);        container.add(radioButton1,BorderLayout.CENTER);        container.add(radioButton2,BorderLayout.NORTH);        container.add(radioButton3,BorderLayout.SOUTH);        this.setVisible(true);        this.setSize(500,300);        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);    }    public static void main(String[] args) {        new JButtonDemo02();    }}
  • 复选按钮
package Swing;import java.awt.*;import .URL;import javax.swing.*;public class JButtonDemo03 extends JFrame {    public JButtonDemo03(){        Container container = this.getContentPane();        //将一个图片变成图标        URL resource = JButtonDemo01.class.getResource("../Swing/result.png");        Icon icon = new ImageIcon(resource);        //多选框        JCheckBox checkBox01 = new JCheckBox("checkBox01");        JCheckBox checkBox02 = new JCheckBox("checkBox02");        container.add(checkBox01,BorderLayout.NORTH);        container.add(checkBox02,BorderLayout.SOUTH);        this.setVisible(true);        this.setSize(500,300);        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);    }    public static void main(String[] args) {        new JButtonDemo03();    }}

3.6.列表

  • 下拉框
package Swing;import javax.swing.*;import java.awt.*;class TestComboboxDemo01 extends JFrame {    public TestComboboxDemo01(){        Container container = this.getContentPane();        JComboBox status = new JComboBox();        status.addItem(null);        status.addItem("正在热映");        status.addItem("已下架");        status.addItem("即将上映");        container.add(status);        this.setVisible(true);        this.setSize(500,350);        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);    }    public static void main(String[] args) {        new TestComboboxDemo01();    }}
  • 列表框
package Swing;import javax.swing.*;import java.awt.*;import java.util.Vector;class TestComboboxDemo02 extends JFrame {    public TestComboboxDemo02(){        Container container = this.getContentPane();        //生成列表内容        //String[] contents = {"1","2","3"};        Vector contents = new Vector();        //列表中需要放入内容        JList jList = new JList(contents);        contents.add("zzk");        contents.add("zzj");        contents.add("zzh");        container.add(jList);        this.setVisible(true);        this.setSize(500,350);        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);    }    public static void main(String[] args) {        new TestComboboxDemo02();    }}
  • 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 Swing;import javax.swing.*;import java.awt.*;public class TestTextDemo01 extends JFrame {    public TestTextDemo01(){        Container container = this.getContentPane();        JTextField textField = new JTextField("hello");        JTextField textField2 = new JTextField("world",20);        container.add(textField,BorderLayout.NORTH);        container.add(textField2,BorderLayout.SOUTH);        this.setVisible(true);        this.setSize(500,350);        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);    }    public static void main(String[] args) {        new TestTextDemo01();    }}
  • 密码框
package Swing;import javax.swing.*;import java.awt.*;public class TestTextDemo03 extends JFrame {    public TestTextDemo03(){        Container container = this.getContentPane();        JPasswordField passwordField = new JPasswordField();//默认....        passwordField.setEchoChar('*');        container.add(passwordField);        this.setVisible(true);        this.setSize(500,350);        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);    }    public static void main(String[] args) {        new TestTextDemo03();    }}
  • 文本域
JTextArea textArea = new JTextArea(20,50);textArea.setText("JAVAGUI学习");

4.贪吃蛇

帧,如果时间足够小,就是动画,一秒30帧,60帧.连起来是动画,拆开就是静态的图片!

键盘监听

定时器Timer

核心步骤:

  1. 定义数据
  2. 画上去
  3. 监听事件
    键盘
    事件

5.总结

  • AWT用来实现监听
  • Swing用来画界面