Java GUI：Swing详细代码及运行结果

3、Swing3.1、窗口、面板JFrameDemo:package com.longge.lesson04;import javax.swing.*;import java.awt.*;import java.awt.event.WindowAdapter;public class JFrameDemo extends Frame{public static void main(String[]

不会代码的程序yuan

929人浏览 · 2021-08-15 11:41:51

不会代码的程序yuan · 2021-08-15 11:41:51 发布

3、Swing

3.1、窗口、面板

JFrameDemo:

package com.longge.lesson04;

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

public class JFrameDemo extends Frame{
    public static void main(String[] args) {
        //建立一个窗口
        new JFrameDemo().init();
    }
    //init();初始化
    public void init() {
        //JFrame是顶级窗口
        JFrame frame = new JFrame("这是一个JFrame窗口");
        frame.setVisible(true);
        //frame.setBackground(Color.black);这句代码不能执行
        frame.setBounds(100,200,400,400);
        //关闭事件
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        //设置文字 Jlabel,设置文字居中
        JLabel label = new JLabel("欢迎来到龙哥的公司",SwingConstants.CENTER);
        frame.add(label);
        //frame.getContentPane().setBackground(Color.yellow);
    }
}

operation result:
在这里插入图片描述

JFrameDemo02:

package com.longge.lesson04;

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

public class JFrame02 {
    public static void main(String[] args) {
        new MyJFrame().init();
    }

}
 class MyJFrame extends JFrame{
    public void init(){

        //设置标题 ！！！
        this.setTitle("java");
        setVisible(true);
        setBounds(100,100,500,500);
        //获得一个容器
        Container contentPane = this.getContentPane();

        contentPane.setBackground(Color.yellow);
        JLabel label = new JLabel("欢迎来到北京!");

        //设置水平居中
        label.setHorizontalAlignment(SwingConstants.CENTER);
        this.add(label);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
}

operation result:
在这里插入图片描述

3.2、弹窗

package com.longge.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(500,700);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        //JFrame 放东西 放到容器里
        Container container = this.getContentPane();
        //绝对布局 绝对定位
        container.setLayout(null);
        //按钮
        JButton button = new JButton("点击会弹出来一个框");
        button.setBounds(20,30,200,50);

        //点击按钮的时候 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();
    }
}
//弹窗的窗口类
class MyDialogDemo extends JDialog{
    public MyDialogDemo() {
        this.setVisible(true);
        this.setBounds(100,100,500,500);
        //this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        Container container = this.getContentPane();

        container.add(new JLabel("学习Java"));
    }
}

Operation result:

在这里插入图片描述

3.3、标签

new Label("XXX");

图标标签 ICON

package com.longge.lesson04;

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(15,15);

        //图标放在标签上，也可以放在按钮上
        JLabel label = new JLabel("IconTest", iconDemo, SwingConstants.CENTER);
        Container container = this.getContentPane();

        container.add(label);

        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        this.setVisible(true);
    }

    public static void main(String[] args) {

        new IconDemo().init();
    }

    @Override
    public void paintIcon(Component c, Graphics g, int x, int y) {
        g.fillOval(x,y,width,height);
    }

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

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

operation result:
在这里插入图片描述

图片标签ICON

package com.longge.lesson04;

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

public class ImageIconDemo extends JFrame {
    public ImageIconDemo() {

        //获取图片的地址
        URL resource = ImageIconDemo.class.getResource("R-C.jpg");
        Icon imageIcon = new ImageIcon(resource);

        //将图片添加到这个标签旁
        JLabel label = new JLabel("ImageIcon");
        label.setIcon(imageIcon);

        //添加到容器里
        Container container = this.getContentPane();
        container.add(label);

        this.setVisible(true);
        this.setBounds(100,100,1200,900);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);



    }

    public static void main(String[] args) {

        new ImageIconDemo();
    }
}

operation result:
在这里插入图片描述

3.4、面板

JPanel

package com.longge.lesson05;

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

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

        JPanel panel1 = new JPanel(new GridLayout(2,3));
        JPanel panel2 = new JPanel(new GridLayout(1,2));
        JPanel panel3 = new JPanel(new GridLayout(2,1));
        JPanel panel4 = new JPanel(new GridLayout(1,1));

        panel1.add(new JButton("A"));
        panel1.add(new JButton("B"));
        panel1.add(new JButton("C"));
        panel1.add(new JButton("D"));
        panel1.add(new JButton("E"));
        panel1.add(new JButton("F"));
        panel2.add(new JButton("G"));
        panel2.add(new JButton("H"));
        panel3.add(new JButton("I"));
        panel3.add(new JButton("J"));
        panel4.add(new JButton("K"));

        container.add(panel1);
        container.add(panel2);
        container.add(panel3);
        container.add(panel4);

        this.setVisible(true);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        this.setSize(600,600);

    }

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

operation result:
在这里插入图片描述

JScrollPanel

package com.longge.lesson05;

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

public class JScrollDemo extends JFrame {
    public JScrollDemo() {
        //文本域
        JTextArea textArea = new JTextArea(30,50);
        textArea.setText("欢迎大家观看狂神说Java");

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

        this.setBounds(200,200,400,400);
        this.setVisible(true);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }

    public static void main(String[] args) {

        new JScrollDemo();
    }
}

operation result:
在这里插入图片描述

3.5、按钮

图片按钮

package com.longge.lesson05;


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

public class JButtonDemo extends JFrame {
    public JButtonDemo()  {
        
        URL resource = JButtonDemo.class.getResource("belle.jpg");
        ImageIcon icon = new ImageIcon(resource);

        JButton button = new JButton();
        button.setIcon(icon);
        button.setToolTipText("图片按钮");

        //add
        Container container = this.getContentPane();
        container.add(button);

        this.setVisible(true);
        this.setSize(900,1000);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

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

在这里插入图片描述

单选按钮

package com.longge.lesson05;

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

public class JButtonDemo02 extends JFrame {
    public JButtonDemo02() {
        
        URL resource = JButtonDemo02.class.getResource("girl.jpg");
        ImageIcon icon = new ImageIcon(resource);

        //单选框
        JRadioButton radioButton1 = new JRadioButton("JRadioButton01");
        JRadioButton radioButton2 = new JRadioButton("JRadioButton02");
        JRadioButton radioButton3 = new JRadioButton("JRadioButton03");

        //由于单选框只能选择一个，需要分组，一个组中只能选择一个
        ButtonGroup group = new ButtonGroup();
        group.add(radioButton1);
        group.add(radioButton2);
        group.add(radioButton3);
        //add
        Container container = this.getContentPane();
        container.add(radioButton1,BorderLayout.NORTH);
        container.add(radioButton2,BorderLayout.CENTER);
        container.add(radioButton3,BorderLayout.SOUTH);

        this.setVisible(true);
        this.setSize(900,1000);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }

    public static void main(String[] args) {
        new JButtonDemo02();
    }
}

operation result:
在这里插入图片描述

复选按钮

package com.longge.lesson05;

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

public class JButtonDemo03 extends JFrame {
    public JButtonDemo03() {

        //获取图片的地址
        URL resource = JButtonDemo02.class.getResource("girl.jpg");
        ImageIcon icon = new ImageIcon(resource);

        //多选框
        Checkbox checkbox01 = new Checkbox("checkbox01");
        Checkbox checkbox02 = new Checkbox("checkbox02");

        Container container = this.getContentPane();
        container.add(checkbox01,BorderLayout.NORTH);
        container.add(checkbox02,BorderLayout.SOUTH);
        this.setVisible(true);
        this.setSize(600,400);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }

    public static void main(String[] args) {
        new JButtonDemo03();
    }
}

operation result:
在这里插入图片描述

3.6、列表

下拉框

package com.longge.lesson06;

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

public class TestComboBoxDemo01 extends JFrame {
    public TestComboBoxDemo01() {
        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 container = this.getContentPane();
        container.add(status);
        this.setVisible(true);
        this.setSize(300,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestComboBoxDemo01();
    }
}

operation result:
在这里插入图片描述

列表框

package com.longge.lesson06;

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

public class TestComboBoxDemo02 extends JFrame {
    public TestComboBoxDemo02() {
        //生成列表的内容
        //String [] contents = {"列表1","列表2","列表3"};

        Vector contents = new Vector();
        //列表中需要放入内容
        JList jList = new JList(contents);

        contents.add("小学");
        contents.add("初中");
        contents.add("高中");
        contents.add("大学");
        contents.add("研究生");
        Container container = this.getContentPane();
        container.add(jList);

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

    public static void main(String[] args) {
        new TestComboBoxDemo02();
    }
}

operation result:
在这里插入图片描述

3.7、文本框

文本框

package com.longge.lesson06;

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

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

        JTextField textField1 = new JTextField("hello");
        JTextField textField2 = new JTextField("world",10);

        container.add(textField1,BorderLayout.SOUTH);
        container.add(textField2,BorderLayout.NORTH);

        this.setVisible(true);
        this.setSize(600,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestTextDemo01();
    }
}

operation result:
在这里插入图片描述

密码框

package com.longge.lesson06;

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

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

        //尽量在面板中
        JPasswordField passwordField = new JPasswordField();
        passwordField.setEchoChar('*');//***

        container.add(passwordField);

        this.setVisible(true);
        this.setSize(600,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {

        new TestTextDemo02();
    }
}

operation result:
在这里插入图片描述

文本域

package com.longge.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(30,50);
        textArea.setText("欢迎大家观看狂神说Java");

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

        this.setBounds(200,200,400,400);
        this.setVisible(true);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }

    public static void main(String[] args) {

        new JScrollDemo();
    }
}