GUI编程

GUI编程

1、简介

Gui核心技术：Swing，AWT

学习Gui的用处：了解MVC架构，了解监听器！

2、AWT

2.1、AWT介绍

1. 包含很多类和接口！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

package com.sgl.lession01;

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图像界面窗口");
        //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(170, 31, 31));
        //frame.setBackground(Color.BLACK);
        //弹出的初始位置
        frame.setLocation(300,300);
        //设置大小固定
        frame.setResizable(false);

    }
}

运行效果：

创建多个窗口（封装）

package com.sgl.lession01;

import java.awt.*;

public class TestFrame2 {
    public static void main(String[] args) {

        //创建多个窗口
        MyFrame myFrame = new MyFrame(100,100,200,200,Color.blue);
        MyFrame myFrame1 = new MyFrame(300,100,200,200,Color.CYAN);
        MyFrame myFrame2 = new MyFrame(100,300,200,200,Color.GREEN);
        MyFrame myFrame3 = new MyFrame(300,300,200,200,Color.YELLOW);
    }

}
class MyFrame extends Frame{
    static int id = 0;//可能存在多个窗口，计数器

    public MyFrame(int x,int y,int w,int h,Color color){
        super("MyFrame"+(++id));
        setBackground(color);//窗口大小和起始位置
        setBounds(x,y,w,h);
        setVisible(true);
    }
}

运行结果：

2、Panel

顺便解决了关闭事件

package com.sgl.lession01;

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

public class TestPannel {
    public static void main(String[] args) {
        Frame frame = new Frame("hello Panel");
        //布局的概念
        Panel panel = new Panel();

        //设置布局
        frame.setLayout(null);
        //坐标
        frame.setBounds(300,300,500,500);
        frame.setBackground(new Color(23, 73, 199));

        //Panel设置坐标，相对于Frame
        panel.setBounds(50,50,400,400);
        panel.setBackground(new Color(21, 153, 28));

        //添加面板
        frame.add(panel);

        //设置可见性
        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() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });


    }
}

运行结果：

2.3、布局管理器

• 流式布局FlowLayout

package com.sgl.lession01;

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(FlowLayout.CENTER));//默认居中
        //frame.setLayout(new FlowLayout(FlowLayout.LEFT));

        frame.setSize(400,400);

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

        frame.setVisible(true);

    }
}

• 东西南北中BorderLayout

package com.sgl.lession01;

import java.awt.*;

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

        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(400,400);
        frame.setVisible(true);
    }
}

• 表格布局GridLayout

package com.sgl.lession01;

import java.awt.*;

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

        Button bt1 = new Button("bt1");
        Button bt2 = new Button("bt2");
        Button bt3 = new Button("bt3");
        Button bt4 = new Button("bt4");
        Button bt5 = new Button("bt5");
        Button bt6 = new Button("bt6");

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

        frame.add(bt1);
        frame.add(bt2);
        frame.add(bt3);
        frame.add(bt4);
        frame.add(bt5);
        frame.add(bt6);

        //Java函数！ 自动选择最优的布局
        frame.pack();
        frame.setVisible(true);

    }
}

运行结果：

案例：

package com.sgl.lession01;

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();
        frame.setSize(400,400);
        frame.setLocation(300,300);
        frame.setBackground(new Color(0xAC1451));
        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));

        //上面布局搞定
        p1.add(new Button("East-1"),BorderLayout.EAST);
        p1.add(new Button("West-1"),BorderLayout.WEST);
        p2.add(new Button("p2-1"));
        p2.add(new Button("p2-2"));
        p1.add(p2,BorderLayout.CENTER);

        //下面布局
        p3.add(new Button("East-2"),BorderLayout.EAST);
        p3.add(new Button("West-2"),BorderLayout.WEST);
        //下面中间4个
        for (int i = 0; i < 4; i++) {
            p4.add(new Button("p4-"+i));
        }
        p3.add(p4,BorderLayout.CENTER);

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

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

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：流式布局管理器FlowLayout，东西南北中布局BorderLayout，表格布局GridLayout
4. 大小，定位，背景颜色，可见性，监听！

2.4、事件监听

package com.sgl.lession01.lession2;

import java.awt.*;
import java.awt.event.*;

public class Test {
    public static void main(String[] args) {
        //按下按钮，触发一些事件
        Frame frame = new Frame();
        Button button = new Button("btn1");

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

        frame.add(button, BorderLayout.CENTER);
        frame.pack();

        windowClose(frame);//调用方法windowClose()
        frame.setVisible(true);

    }

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


    }
}

//事件监听
class MyActionListener implements ActionListener{
    @Override
    public void actionPerformed(ActionEvent e) {
        System.out.println("Action");
    }
}

多个按钮共享一个事件

package com.sgl.lession01.lession2;

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 Test {
    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会返回的命令，如果不显示定义，则会走默认值
        //可以多个按钮只写一个监听类
        button2.setActionCommand("button2-stop");

        MyActionListenner myActionListenner = new MyActionListenner();

        button1.addActionListener(myActionListenner);
        button2.addActionListener(myActionListenner);

        frame.add(button1,BorderLayout.WEST);
        frame.add(button2,BorderLayout.EAST);

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

    }

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

class MyActionListenner implements ActionListener{
    @Override
    public void actionPerformed(ActionEvent e) {
        //e.getActionCommand()  获取按钮的信息
        System.out.println("按钮被点击了:msg-->"+e.getActionCommand());
    }
}

2.5、输入框TextField

package com.sgl.lession01.lession2;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 Test {    public static void main(String[] args) {        MyFrame myFrame = new MyFrame();        windowClose(myFrame);    }    private static void windowClose(MyFrame myFrame) {        myFrame.addWindowListener(new WindowAdapter() {            @Override            public void windowClosing(WindowEvent e) {                System.exit(0);            }        });    }}class MyFrame extends Frame {    public MyFrame(){        TextField textField = new TextField();        add(textField);        //监听这个文本框输入的文字        MyActionLintener myActionLintener = new MyActionLintener();        //按下Enter，就会触发输入框的事件        textField.addActionListener(myActionLintener);        //设置替换编码        textField.setEchoChar('*');        pack();        setVisible(true);    }}class MyActionLintener implements ActionListener{    @Override    public void actionPerformed(ActionEvent e) {        TextField field = (TextField) e.getSource();//获得一些资源,返回一个对象        System.out.println(field.getText());//获得输入框的文本        field.setText("");//按下Enter，清空    }}

2.6、简易计算器，组合+内部类回顾

package com.sgl.lession01.lession2;import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;//简易计算机public class Test {    public static void main(String[] args) {        new Calculator();    }}//计算器类class Calculator extends Frame{    public Calculator() {        //3个文本框        TextField num1 = new TextField(10);        TextField num2 = new TextField(10);        TextField num3 = new TextField(15);        //1个按钮        Button button = new Button("=");        //MyActionListener myActionListener = new MyActionListener();        button.addActionListener(new MyActionListener(num1,num2,num3));        //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);    }}//监听类class MyActionListener implements ActionListener{    //获取3个变量    private TextField num1,num2,num3;    public MyActionListener(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 + 运算后，放到第三个框        num3.setText(""+(n1+n2));        //3.清除前两个框        //num1.setText("");        //num2.setText("");    }}

运行结果：

面向对象写法：

package com.sgl.lession01.lession2;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class Test {
    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(){
        //3个文本框
        num1 = new TextField(10);
        num2 = new TextField(10);
        num3 = new TextField(15);

        //1个按钮
        Button button = new Button("=");
        //MyActionListener myActionListener = new MyActionListener();
        button.addActionListener(new MyActionListener(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);
    } 
}
//监听类
class MyActionListener implements ActionListener{
    //获取计算机这个对象，在一个类中组合另一个类
    Calculator calculator = null;

    public MyActionListener(Calculator calculator){
        this.calculator = calculator;
    }
    @Override
    public void actionPerformed(ActionEvent e) {
        //1.获得加数和被加数
        //2.将这个值 + 运算后，放到第三个框
        //3.清除前两个框
        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：

package com.sgl.lession01.lession2;import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;public class Test {    public static void main(String[] args) {        new Calculator().loadFrame();    }}class Calculator extends Frame{    TextField num1,num2,num3;    public void loadFrame(){        num1 = new TextField(10);        num2 = new TextField(10);        num3 = new TextField(15);        Button button = new Button("=");        //MyActionListener myActionListener = new MyActionListener();        button.addActionListener(new MyActionListener());        Label label = new Label("+");        setLayout(new FlowLayout());        add(num1);        add(label);        add(num2);        add(button);        add(num3);        pack();        setVisible(true);    }    //内部类可以直接访问外部类的属性和方法    private class MyActionListener 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 com.sgl.lession01.lession2;import java.awt.*;public class Test {    public static void main(String[] args) {        new MyPaint().loadFrame();    }}class MyPaint extends Frame{    public void loadFrame(){        setBounds(200,200,600,600);        setVisible(true);    }    //画笔    @Override    public void paint(Graphics g) {        //画笔颜色        //g.setColor(Color.BLUE);        g.drawOval(100,100,50,50);        g.fillOval(200,200,50,50);        //g.setColor(Color.black);        g.fillRect(300,300,50,60);    }}

2.8、鼠标监听

package com.sgl.lession01.lession2;import java.awt.*;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;import java.util.ArrayList;import java.util.Iterator;//鼠标监听事件public class Test {    public static void main(String[] args) {        new MyFrame("画图");    }}class MyFrame extends Frame{    //监听鼠标的位置，用集合存储这个点    ArrayList<Object> points;    public MyFrame(String title) {        super(title);        setBounds(200,200,400,400);        setVisible(true);        //存鼠标点击的点        points = new ArrayList<>();        //鼠标监听事件，针对这个窗口        this.addMouseListener(new MyMouseListener());    }    @Override    public void paint(Graphics g) {        //画画，监听鼠标的事件        Iterator<Object> 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 {        @Override        public void mousePressed(MouseEvent e) {            MyFrame frame = (MyFrame) e.getSource();            //点击，界面产生一个点  是鼠标的点            frame.addPaint(new Point(e.getX(),e.getY()));            //每次点击鼠标，重新画一遍            frame.repaint();//刷新        }    }}

2.9、窗口监听

package com.sgl.lession01.lession2;import java.awt.*;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;public class Test {    public static void main(String[] args) {        new WindowFrame();    }}class WindowFrame extends Frame {    public WindowFrame() {        setBackground(Color.CYAN);        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");                    }                    //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");                    }                }        );    }    /*    class MyWindowListener extends WindowAdapter {        @Override        public void windowClosing(WindowEvent e) {            setVisible(false);//隐藏窗口            System.exit(0);//正常退出        }    }     */}

2.10、键盘监听

package com.sgl.lession01.lession2;import java.awt.*;import java.awt.event.KeyAdapter;import java.awt.event.KeyEvent;public class Test {    public static void main(String[] args) {        new KeyFrame();    }}class KeyFrame extends Frame {    public KeyFrame() {        setBounds(1, 2, 400, 400);        setVisible(true);        this.addKeyListener(new KeyAdapter() {            //键盘按下            @Override            public void keyPressed(KeyEvent e) {                //获取键盘按下的是哪个键                int keyCode = e.getKeyCode();                System.out.println(keyCode);                if (keyCode == KeyEvent.VK_UP){                    System.out.println("按下了上建");                }            }        });    }}

3.Swing

3.1、窗口，面板

package com.sgl.lession01.lession2;

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

public class JFrameDemo {

    //init();  初始化
    public void init(){
        JFrame jFrame = new JFrame();
        jFrame.setVisible(true);
        jFrame.setBounds(100,100,200,200);
        jFrame.setBackground(Color.CYAN);
        //获得一个容器
        Container container = jFrame.getContentPane();
        container.setBackground(Color.cyan);
        
        //关闭事件
        jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        //设置文字
        JLabel jLabel = new JLabel("欢迎来到HeNan");
        jFrame.add(jLabel);

        //让文本标签居中  设置水平对其
        jLabel.setHorizontalAlignment(SwingConstants.CENTER);

    }
    public static void main(String[] args) {
        //建立一个窗口
        new JFrameDemo().init();

    }
}

3.2、弹窗

Jdialog,用来被弹出，默认有关闭事件

package com.sgl.lession01.lession2;

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

public class JFrameDemo extends JFrame{

        public JFrameDemo(){
            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("点击弹出对话窗");
            button.setBounds(30,30,200,200);
            button.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    //弹窗
                    new MyDialogDemo();
                }
            });
            container.add(button);
        }


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

    }
}

//弹窗的窗口
class MyDialogDemo extends JDialog{
    public MyDialogDemo() {
        this.setBounds(100,50,500,500);
        this.setVisible(true);
        this.setSize(200,200);
        //this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);  系统自带，加上系统会提醒

        Container container = this.getContentPane();
        container.setBackground(Color.BLUE);
        container.setLayout(null);
        JLabel jLabel = new JLabel("跟着秦老师学Java");
        container.add(jLabel);

    }
}

3.3、标签

label

new Jlable("xxx");

图标ICON

package com.sgl.lession01.lession2;import javax.swing.*;import java.awt.*;//图标。需要实现类，JFrame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.height = height;        this.width = width;    }    public void init(){        IconDemo iconDemo = new IconDemo(50,50);        //图标放在标签上，也可以放在按钮上        JLabel jLabel = new JLabel("icontext", iconDemo, SwingConstants.CENTER);        Container container = this.getContentPane();        container.add(jLabel);        this.setVisible(true);        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);    }    @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;    }    public static void main(String[] args) {        IconDemo iconDemo = new IconDemo();        iconDemo.setBounds(200,200,500,500);        iconDemo.setVisible(true);        iconDemo.init();        //iconDemo.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);    }}

图片ICON

package com.sgl.lession01.lession2;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",SwingConstants.CENTER);        URL url = ImageIconDemo.class.getResource("985.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 com.sgl.lession01.lession2;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));//gap间隙        JPanel jPanel1 = new JPanel(new GridLayout(1,3));        JPanel jPanel2 = new JPanel(new GridLayout(1,2));        JPanel jPanel3 = new JPanel(new GridLayout(2,1));        JPanel jPanel4 = new JPanel(new GridLayout(3,2));        jPanel1.add(new Button("1"));        jPanel1.add(new Button("1"));        jPanel1.add(new Button("1"));        jPanel2.add(new Button("2"));        jPanel2.add(new Button("2"));        jPanel3.add(new Button("3"));        jPanel3.add(new Button("3"));        jPanel4.add(new Button("4"));        jPanel4.add(new Button("4"));        jPanel4.add(new Button("4"));        jPanel4.add(new Button("4"));        jPanel4.add(new Button("4"));        jPanel4.add(new Button("4"));        container.add(jPanel1);        container.add(jPanel2);        container.add(jPanel3);        container.add(jPanel4);        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);        this.setVisible(true);        this.setSize(500,500);    }    public static void main(String[] args) {        new JPanelDemo();    }}

JscrollPanel

package com.sgl.lession01.lession2;import javax.swing.*;import java.awt.*;public class JScrollDemo extends JFrame {    public JScrollDemo(){        Container container = getContentPane();        //文本域        JTextArea textArea = new JTextArea(20,50);        textArea.setText("欢迎欢迎");        //面板        JScrollPane scrollPane = new JScrollPane(textArea);        container.add(scrollPane);        this.setVisible(true);        this.setBounds(100,100,300,500);        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);    }    public static void main(String[] args) {        new JScrollDemo();    }}

3.5、按钮

• 图片按钮

package com.sgl.lession01.lession2;import javax.swing.*;import java.awt.*;import java.net.URL;public class JButtonDemo extends JFrame {    public JButtonDemo(){        Container container = this.getContentPane();        URL resource = JButtonDemo.class.getResource("985.jpg");        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");        container.add(button);        this.setVisible(true);        this.setSize(500,300);        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);    }    public static void main(String[] args) {        new JButtonDemo();    }}

• 单选按钮

package com.sgl.lession01.lession2;

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

public class JButtonDemo extends JFrame {

    public JButtonDemo(){
        Container container = this.getContentPane();

        URL resource = JButtonDemo.class.getResource("985.jpg");
        Icon icon = new ImageIcon(resource);

        //单选框
        JRadioButton jRadioButton1 = new JRadioButton("jRadioButton1");
        JRadioButton jRadioButton2 = new JRadioButton("jRadioButton2");
        JRadioButton jRadioButton3 = new JRadioButton("jRadioButton3");
        
        //由于单选框只能选一个，分组，一个组只能选一个
        ButtonGroup buttonGroup = new ButtonGroup();
        buttonGroup.add(jRadioButton1);
        buttonGroup.add(jRadioButton2);
        buttonGroup.add(jRadioButton3);
        
        container.add(jRadioButton1,BorderLayout.CENTER);
        container.add(jRadioButton2,BorderLayout.NORTH);
        container.add(jRadioButton3,BorderLayout.SOUTH);

        this.setVisible(true);
        this.setSize(500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }


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

• 复选按钮

package com.sgl.lession01.lession2;

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

public class JButtonDemo extends JFrame {

    public JButtonDemo(){
        Container container = this.getContentPane();

        URL resource = JButtonDemo.class.getResource("985.jpg");
        Icon icon = new ImageIcon(resource);

        //多选框
        JCheckBox jCheckBox01 = new JCheckBox("jCheckBox01");
        JCheckBox jCheckBox02 = new JCheckBox("jCheckBox02");
        
        container.add(jCheckBox01,BorderLayout.NORTH);
        container.add(jCheckBox02,BorderLayout.SOUTH);

        this.setVisible(true);
        this.setSize(500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }


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

3.6、列表

• 下拉框

package com.sgl.lession01.lession2;import javax.swing.*;import java.awt.*;public class TextComboboxDemo01 extends JFrame {        public TextComboboxDemo01(){            Container container = this.getContentPane();            JComboBox<Object> jComboBox = new JComboBox<>();            jComboBox.addItem(null);            jComboBox.addItem("正在热映");            jComboBox.addItem("已下架");            jComboBox.addItem("即将上映");            container.add(jComboBox);            this.setVisible(true);            this.setSize(500,500);            this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);        }    public static void main(String[] args) {        new TextComboboxDemo01();    }}

• 列表框

package com.sgl.lession01.lession2;import javax.swing.*;import java.awt.*;import java.util.Vector;public class TextComboboxDemo01 extends JFrame {        public TextComboboxDemo01(){            Container container = this.getContentPane();            //生成列表内容            //String[] contents = {"1","2","3"};            Vector vector = new Vector();            //列表需要放入的内容            //JList jList = new JList(contents);            JList jList = new JList(vector);            vector.add("zhangshan");            vector.add("lisi");            vector.add("wangwu");            container.add(jList);            this.setVisible(true);            this.setSize(500,500);            this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);        }    public static void main(String[] args) {        new TextComboboxDemo01();    }}

3.7、文本框

• 文本框

package com.sgl.lession01.lession2;import javax.swing.*;import java.awt.*;public class TextTextDemo01 extends JFrame {    public TextTextDemo01(){        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(500,300);        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);    }    public static void main(String[] args) {        new TextTextDemo01();    }}

• 密码框

package com.sgl.lession01.lession2;import javax.swing.*;import java.awt.*;public class TextTextDemo01 extends JFrame {    public TextTextDemo01(){        Container container = this.getContentPane();        JPasswordField passwordField = new JPasswordField();        passwordField.setEchoChar('*');        container.add(passwordField);        this.setVisible(true);        this.setSize(500,300);        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);    }    public static void main(String[] args) {        new TextTextDemo01();    }}

• 文本域

package com.sgl.lession01.lession2;import javax.swing.*;import java.awt.*;public class JScrollDemo extends JFrame {    public JScrollDemo(){        Container container = getContentPane();        //文本域        JTextArea textArea = new JTextArea(20,50);        textArea.setText("欢迎欢迎");        //面板        JScrollPane scrollPane = new JScrollPane(textArea);        container.add(scrollPane);        this.setVisible(true);        this.setBounds(100,100,300,500);        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);    }    public static void main(String[] args) {        new JScrollDemo();    }}