GUI编程

告诉大家怎么学？

这是什么？
它怎么玩？
该如何去在我们平时运用？

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

因为界面不美观
需要jre环境！

为什么我们要学习？

可以写出自己心中想要的一些小工具
工作的时候也可能需要维护swing界面，概率极小！
了解MVC架构，了解监听！

2、AWT

2.1、AWT介绍

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

2.2、组件和容器

1、Frame

package com.yehuan.lesson01;

import java.awt.*;

//GUI的第一个界面
public class TestFrame{
    public static void main(String[] args) {

        //Frame ,jdk, 看源码！！
        Frame frame = new Frame("我的第一个Java图形界面窗口");

        //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 Color
        frame.setBackground(new Color(100, 74, 223));

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

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

问题：发现窗口关闭不掉，停止Java程序运行！

尝试回顾封装：

package com.yehuan.lesson01;

import java.awt.*;


public class TestFrame02 {
    public static void main(String[] args) {
        //展示多个窗口 new
        MyFrame myFrame1 = new MyFrame(100, 100, 200, 200, Color.blue);
        MyFrame myFrame2 = new MyFrame(300, 100, 200, 200, Color.yellow);
        MyFrame myFrame3 = new MyFrame(100, 300, 200, 200, Color.red);
        MyFrame myFrame4 = new MyFrame(300, 300, 200, 200, Color.MAGENTA);
    }
}
class MyFrame extends Frame{
    static int id = 0;//可能存在多个窗口，我们需要一个计数器
    public MyFrame(int x, int y, int w, int h, Color color) {
        super("MyFrame"+(++id));
        setVisible(true);
        setBounds(x,y,w,h);
        setBackground(color);
    }
}

2、面板Panel

解决了关闭事件！

package com.yehuan.lesson01;

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();

        //布局的概念
        //设置布局
        frame.setLayout(null);

        //坐标
        frame.setBounds(300,300,500,500);
        frame.setBackground(new Color(159, 232, 14));

        //panel设置坐标，相对于 frame
        panel.setBounds(50,50,400,400);
        panel.setBackground(new Color(221, 25, 48));

        //frame.add(panel)
        frame.add(panel);
        frame.setVisible(true);

        //监听事件，监听窗口关闭事件  System.exit(0)
        //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);
            }
        });
    }
}

2.3、布局管理器

流式布局

package com.yehuan.lesson01;

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));//左
        frame.setLayout(new FlowLayout(FlowLayout.RIGHT));//右

        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

package com.yehuan.lesson01;

import java.awt.*;

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

        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（Grid）

package com.yehuan.lesson01;

import java.awt.*;

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

        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(2,3));

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

        frame.pack();//Java函数
        frame.setVisible(true);
    }
}

练习：

package com.yehuan.lesson01;

import java.awt.*;

//练习的demo
public class ExDemo {
    public static void main(String[] args) {
        //总的Frame
        Frame frame = new Frame();
        frame.setLocation(200,300);
        frame.setSize(400,400);
        frame.setBackground(Color.BLACK);
        frame.setVisible(true);
        frame.setLayout(new GridLayout(2,1));

        //4个面板
        Panel p1 = new Panel(new BorderLayout());
        Panel p2 = new Panel(new GridLayout(2,1));
        Panel p3 = new Panel(new BorderLayout());
        Panel p4 = new Panel(new GridLayout(2,2));

        //上面ok
        p1.add(new Button("East-1"),BorderLayout.EAST);
        p1.add(new Button("West-1"),BorderLayout.WEST);
        p2.add(new Button("p2-btn-1"));
        p2.add(new Button("p2-btn-2"));
        p1.add(p2,BorderLayout.CENTER);

        p3.add(new Button("East-1"),BorderLayout.EAST);
        p3.add(new Button("West-1"),BorderLayout.WEST);
        for (int i = 0;i<4;i++){
            p4.add(new Button("for-"+i));
        }
        p3.add(p4,BorderLayout.CENTER);

        frame.add(p1);
        frame.add(p3);

    }
}

总结：

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

2.4、事件监听

事件监听：当某个事情发生的时候，干什么？

package com.yehuan.lesson02;

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) {
        //按下按钮，触发一些事件
        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);
        frame.pack();
        windowClose(frame);//关闭窗口
        frame.setVisible(true);
    }
    //关闭窗体事件
    private static void windowClose(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：

package com.yehuan.lesson02;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

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();
        Button button1 = new Button("start");
        Button button2 = new Button("stop");
        //可以显示的定义触发返回的命令，如果不显示定义，则会走默认的值！
        //可以写多个按钮只写一个监听类
        button2.setActionCommand("button2-stop");

        MyMonitor myMonitor = new MyMonitor();
        button2.addActionListener(myMonitor);
        button1.addActionListener(myMonitor);

        frame.add(button1,BorderLayout.NORTH);
        frame.add(button2,BorderLayout.SOUTH);
        frame.pack();
        frame.setVisible(true);
    }

}
class MyMonitor implements ActionListener{
    @Override
    public void actionPerformed(ActionEvent e) {
        //e.getActionCommand() 获得按钮信息

        System.out.println("按钮被点击了：msg"+e.getActionCommand());
    }
}

2.5、输入框TextField 监听

package com.yehuan.lesson02;

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 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 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 source = (TextField) e.getSource();//获得一些资源，返回的一个对象
        System.out.println(source.getText());//获得输入框中的文本
        source.setText("");//null
    }
}

2.6、简易计算器，组合+内部类回顾复习！

oop（面向对象）原则：组合，大于继承！

class A extends B{

}
class A{
	public B b;
}

目前代码：

package com.yehuan.lesson02;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

//简易计算器
public class Calculator {
    public static void main(String[] args) {
        new Calculator1();
    }
}
class Calculator1 extends Frame {
    public Calculator1() {
        //3个文本框
        TextField num1 = new TextField(10);//字符数
        TextField num2 = new TextField(10);
        TextField num3 = new TextField(20);

        //一个按钮
        Button button = new Button("=");
        MyCalculatorListener myCalculatorListener = new MyCalculatorListener(num1, num2, num3);
        button.addActionListener(myCalculatorListener);

        //1 个标签
        Label label = new Label("+");

        //布局
        setLayout(new FlowLayout());

        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);

        pack();
        setVisible(true);
    }
}

class MyCalculatorListener implements ActionListener {
    //获取三个变量
    private TextField num1, num2, num3;

    public MyCalculatorListener(TextField num1, TextField num2, TextField num3) {
        this.num1 = num1;
        this.num2 = num2;
        this.num3 = num3;
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        //1.获得加数和被加数
       int n1 = Integer.parseInt(num1.getText());
       int n2 = Integer.parseInt(num2.getText());

       //2.将这个值+法运算后，放到第三个框
        num3.setText(""+(n1+n2));

        //清除前两个框
        num1.setText("");
        num2.setText("");
    }
}

完全改造为面向对象写法：

package com.yehuan.lesson02;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

//简易计算器
public class Calculator {
    public static void main(String[] args) {
        new Calculator1().loadFrame();
    }
}
//计算机类
class Calculator1 extends Frame {
    //属性
    TextField num1, num2,num3;

    //方法
    public void loadFrame(){
//3个文本框
        num1 = new TextField(10);//字符数
        num2 = new TextField(10);
        num3 = new TextField(20);

        //一个按钮
        Button button = new Button("=");
        button.addActionListener(new MyCalculatorListener(this));

        //1 个标签
        Label label = new Label("+");

        //布局
        setLayout(new FlowLayout());

        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);

        pack();
        setVisible(true);
    }

}

//监听器类
class MyCalculatorListener implements ActionListener {
    //获取计算器这个对象,在一个类中组合另外一个类。
    Calculator1 calculator1 = null;

    public MyCalculatorListener(Calculator1 calculator1) {
        this.calculator1 = calculator1;
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        //1.获得加数和被加数
        //2.将这个值+法运算后，放到第三个框
        //清除前两个框
        int n1 = Integer.parseInt(calculator1.num1.getText());
        int n2 = Integer.parseInt(calculator1.num2.getText());
        calculator1.num3.setText(""+(n1+n2));
        calculator1.num1.setText("");
        calculator1.num2.setText("");
    }
}

内部类:

更好的包装

package com.yehuan.lesson02;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

//简易计算器
public class Calculator {
    public static void main(String[] args) {
        new Calculator1().loadFrame();
    }
}
//计算机类
class Calculator1 extends Frame {
    //属性
    TextField num1, num2,num3;

    //方法
    public void loadFrame(){
//3个文本框
        num1 = new TextField(10);//字符数
        num2 = new TextField(10);
        num3 = new TextField(20);

        //一个按钮
        Button button = new Button("=");
        button.addActionListener(new MyCalculatorListener());

        //1 个标签
        Label label = new Label("+");

        //布局
        setLayout(new FlowLayout());

        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);

        pack();
        setVisible(true);
    }
    //监听器类
//内部类最大的好处，就是可以畅通无阻的访问外部的属性和方法！
    private class MyCalculatorListener implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent e) {
            //1.获得加数和被加数
            //2.将这个值+法运算后，放到第三个框
            //清除前两个框
            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 com.yehuan.lesson03;

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
    @Override
    public void paint(Graphics g) {
        //super.paint(g);
        //g.setColor(Color.red);
        //g.drawOval(100,100,100,100);
        g.fillOval(100,100,100,100);//实心的园

        //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

目的：想要实现鼠标画画！

package com.yehuan.lesson03;

import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;

//鼠标监听事件
public class TestMouseListener {
    public static void main(String[] args) {
        new MyFrame("画笔");
    }
}
class MyFrame extends Frame {
    //画画需要画笔，需要监听鼠标当前位置，需要集合来存储这个点
    ArrayList points;

    public MyFrame(String title) {
        super(title);
        setBounds(200,200,400,300);
        //存鼠标的点
        points = new ArrayList<>();
        //鼠标监听器
        this.addMouseListener(new MyMouseListener());

        setVisible(true);
    }

    @Override
    public void paint(Graphics g) {
        //画画，监听鼠标事件
        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 addPoint(Point point) {
        points.add(point);
    }
    //适配器模式
    private class MyMouseListener extends MouseAdapter {

        @Override
        public void mousePressed(MouseEvent e) {
            MyFrame source = (MyFrame)e.getSource();
            //这个我们点击的时候，就会在界面上产生一个点！
            //这个点就是鼠标的点：
            source.addPoint(new Point(e.getX(),e.getY()));

            //每次点击鼠标都需要重新画一遍
            source.repaint();//刷新
        }
    }
}

2.9、窗口监听

package com.yehuan.lesson03;

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

public class TestWindow {
    public static void main(String[] args) {
        new WindowFrame();
    }
}
class WindowFrame extends Frame{
    public WindowFrame() {
        setVisible(true);
        setBounds(100,100,200,200);
        setVisible(true);
        //addWindowListener(new MyWindowListener());

        this.addWindowListener(
                //匿名内部类
           new WindowAdapter(){
               //关闭窗口
               @Override
               public void windowClosing(WindowEvent e) {
                   System.out.println("windowClosing");
                   System.exit(0);
               }
               //激活窗口
               @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.yehuan.lesson03;

import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

//键
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() {
            //键盘按下
            @Override
            public void keyPressed(KeyEvent e) {
                //获取键盘下是哪一个
                int keyCode = e.getKeyCode();//不需要去记这个数值，直接使用静态属性VK_XXX
                if(keyCode == KeyEvent.VK_UP) {
                    System.out.println("你按下了上键");
                }

                //根据按下不同操作，产生不同结果；

            }
        });
    }
}

3、Swing

3.1、窗口、面板

package com.yehuan.lesson04;

import javax.swing.*;
import java.awt.*;

public class JFrameDemo {

    //init();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("欢迎来到夜欢");
        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 com.yehuan.lesson04;

import javax.swing.*;
import java.awt.*;

public class JframeDemo02 {
    public static void main(String[] args) {
        new Myframe2().init();
    }
}
class Myframe2 extends JFrame {
    public void init(){
        this.setBounds(10,10,200,300);
        this.setVisible(true);

        JLabel label = new JLabel("欢迎来到XXX");

        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.red);
    }
}

3.2、弹窗

JDialog，用来被弹出，默认就有关闭事件！

package com.yehuan.lesson04;


import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

//主窗口
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");//创建
        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);
        //this.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);

        Container container = this.getContentPane();
        container.setLayout(null);

        container.add(new Label("欢迎来到弹窗"));
    }
}

3.3、标签

label

new Jlabel("XXX");

图标ICON

package com.yehuan.lesson04;

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);
        //图标放在标签，也可以放在按钮上！
        JLabel label = new JLabel("icontest", iconDemo, SwingConstants.CENTER);

        Container container = getContentPane();
        container.add(label);

        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.drawOval(x,y,width,height);
    }

    @Override
    public int getIconWidth() {
        return this.width;
    }

    @Override
    public int getIconHeight() {
        return this.height;
    }
}

图片ICON

package com.yehuan.lesson04;

import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class ImageIconDemo extends JFrame {
    public ImageIconDemo() {
        //获取图片地址
        JLabel label = new JLabel("ImageIcon");
        URL url = ImageIconDemo.class.getResource("tx.jpg");

        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 com.yehuan.lesson05;

import javax.swing.*;
import java.awt.*;

public class JPenalDemo extends JFrame {
    public JPenalDemo(){
        Container container = this.getContentPane();
        container.setLayout(new GridLayout(2,1,10,10));//后面的参数的意思是间距

        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"));
        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 JPenalDemo();
    }
}

JScrollPanel

package com.yehuan.lesson05;

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); 设置行列数
        textArea.setText("昼冷夜欢");
        container.add(textArea);

        //Scroll 面板 超过设置的长度时会有滚动条
        JScrollPane scrollPane = new JScrollPane(textArea);
        container.add(scrollPane);
 
        this.setVisible(true);
        this.setBounds(100,100,300,350);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JScrollDemo();
    }
}

3.5、按钮

图片按钮

package com.yehuan.lesson05;

import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class JButtonDemo01 extends JFrame {
    public JButtonDemo01(){
        Container container = this.getContentPane();
        //将图片变成图标
        URL resource = JButtonDemo01.class.getResource("tx.jpg");
        Icon icon = new ImageIcon(resource);

        //把图标放在按钮上
        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 com.yehuan.lesson05;

import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class JButtonDemo02 extends JFrame {
    public JButtonDemo02(){
        Container container = this.getContentPane();
        //将图片变成图标
        URL resource = JButtonDemo01.class.getResource("tx.jpg");
        Icon icon = new ImageIcon(resource);

        //单选框
        JRadioButton radioButton1 = new JRadioButton("radioButton1");
        JRadioButton radioButton2 = new JRadioButton("radioButton2");
        JRadioButton radioButton3 = new JRadioButton("radioButton3");

        //由于单选框只能选择一个，分组，一个组中只能选择一个
        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 com.yehuan.lesson05;

import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class JButtonDemo03 extends JFrame {
    public JButtonDemo03(){
        Container container = this.getContentPane();
        //将图片变成图标
        URL resource = JButtonDemo01.class.getResource("tx.jpg");
        Icon icon = new ImageIcon(resource);

        //多选框
        JCheckBox checkBox1 = new JCheckBox("checkBox1");
        JCheckBox checkBox2 = new JCheckBox("checkBox2");

        container.add(checkBox1, BorderLayout.NORTH);
        container.add(checkBox2,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 com.yehuan.lesson06;

import javax.swing.*;
import java.awt.*;

public class TestComboboxDemo extends JFrame {
    public TestComboboxDemo(){
        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 TestComboboxDemo();
    }
}

列表框

package com.yehuan.lesson06;

import javax.swing.*;
import java.awt.*;
import java.util.Vector;

public class TestComboboxDemo02 extends JFrame {
    public TestComboboxDemo02(){
        Container container = this.getContentPane();

        //生成列表的内容
//        String[] contents={"1","2","3","4","5","6","7","8","9"};

        Vector contents = new Vector();
        //列表中需要放入的内容
        JList JList = new JList(contents);
        contents.add("zhangsan");
        contents.add("lisi");
        contents.add("wangwu");
        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 com.yehuan.lesson06;

import javax.swing.*;
import java.awt.*;
import java.util.Vector;

public class TestTextDemo01 extends JFrame {
    public TestTextDemo01(){
        Container container = this.getContentPane();

        JTextField textField1 = new JTextField("hello");
        JTextField textField2 = new JTextField("world",20);
        container.add(textField1,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 com.yehuan.lesson06;

import javax.swing.*;
import java.awt.*;

public class TestTextDemo02 extends JFrame {
    public TestTextDemo02(){
        Container container = this.getContentPane();

        JPasswordField passworldField = new JPasswordField();//****
        passworldField.setEchoChar('*');

        container.add(passworldField);


        this.setVisible(true);
        this.setSize(500,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestTextDemo02();
    }
}

文本域

package com.yehuan.lesson05;

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("昼冷夜欢");
        container.add(textArea);

        //Scroll 面板
        JScrollPane scrollPane = new JScrollPane(textArea);
        container.add(scrollPane);

        this.setVisible(true);
        this.setBounds(100,100,300,350);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JScrollDemo();
    }
}

posted @ 2025-02-15 22:06 昼冷夜欢阅读(28) 评论(0) 收藏举报

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昼冷夜欢

GUI编程

GUI编程

1.简介

2、AWT

2.1、AWT介绍

2.2、组件和容器

1、Frame

2、面板Panel

2.3、布局管理器

2.4、事件监听

2.5、输入框TextField 监听

2.6、简易计算器，组合+内部类回顾复习！

2.7、画笔

2.8、鼠标监听

2.9、窗口监听

2.10、键盘监听

3、Swing

3.1、窗口、面板

3.2、弹窗

3.3、标签

3.4、面板

3.5、按钮

3.6、列表

3.7、文本框

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