java gui界面 java gui界面技术有哪些

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
• 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

4. 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 java.net.*;
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 java.net.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 java.net.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 java.net.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