GUI核心技术之Swing_button.setbounds-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_42093672/article/details/103412440

本文深入探讨了GUI编程中的Swing技术，包括窗口和面板的创建，如何添加弹窗及设置图标。此外，详细介绍了按钮类型如单选和多选，以及列表框的不同形式如下拉框和普通列表框。最后，讲解了各种文本输入组件，如文本框、密码框和文本域的使用。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

窗口、面板

创建窗口：

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

public class TestJframe {
    public static void main(String[] args) {
        //创建JFrame窗口
        JFrame jFrame = new JFrame();
        jFrame.setBackground(Color.BLUE);
        jFrame.setBounds(100,100,200,200);
        jFrame.setVisible(true);
        //关闭窗口
        jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        Label label = new Label("我的第一个JFrame窗口");
        jFrame.add(label);
    }
}

弹窗

public class DialogDemo extends JFrame {
    public void init() {
        //设置窗口的
        setBounds(100, 100, 200, 200);
        setVisible(true);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        //设置窗口的布局

        //得到一个容器，窗口所有的操作dou在容器中进行
        Container container = this.getContentPane();
        container.setLayout(null);
        //创建button
        JButton button = new JButton("按钮");
        button.setBounds(20, 20, 50, 50);
        //设置按钮事件监听
        button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                //创建一个弹窗
                new DialogLintener();
            }
        });
        //添加button
        container.add(button);

    }

    public static void main(String[] args) {
        //初始化
        new DialogDemo().init();
    }
}

//创建弹窗
    class DialogLintener extends JDialog {
    public DialogLintener() {
        setSize(100, 100);
        setBackground(Color.green);
        setVisible(true);


        setLayout(null);
        JLabel j = new JLabel("弹窗", SwingConstants.CENTER);
       add(j);
    }
}

将图标画上窗口

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

public class IconDemo extends JFrame implements Icon {

    private int width;
    private int height;
    public IconDemo(){}
    public IconDemo (int width,int height){
        this.width=width;
        this.height=height;
    }
    //初始化
    public void init(){
        setSize(200,200);
        setVisible(true);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        //创建一个标签
        IconDemo iconDemo = new IconDemo(10, 10);
        JLabel jLabel = new JLabel("icondemo", iconDemo,SwingConstants.CENTER);
        Container container = getContentPane();
        container.add(jLabel);

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

    new IconDemo().init();
    }
        //实现icon接口重载的方法
    @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;
    }
}

按钮

1.单选按钮

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

public class JButtonDemo02 extends JFrame {

    public JButtonDemo02() {
        Container container = this.getContentPane();
        //将一个图片变为图标
        URL resource = JButtonDemo01.class.getResource("tx.jpg");
        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();
    }
}

2.多选按钮

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

public class JButtonDemo03  extends JFrame {

    public JButtonDemo03() {
        Container container = this.getContentPane();
        //将一个图片变为图标
        URL resource = JButtonDemo01.class.getResource("tx.jpg");
        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();
    }
}

列表框

1.下拉框

public class JComboBoxDemo extends JFrame {
    public void init(){

        JComboBox jComboBox = new JComboBox();
        jComboBox.addItem("1");
        jComboBox.addItem("2");
        jComboBox.addItem("3");
        jComboBox.addItem("4");
        Container container = this.getContentPane();
        container.add(jComboBox);

        setVisible(true);
        setSize(100,100);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);


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

2.列表框

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

public class JLIstDemo extends JFrame {
    public void init(){
        //得到容器
        Container container = getContentPane();
        //创建容器
        Vector vector = new Vector<>();
        //创建列表框
        JList jl = new JList(vector);
        vector.add("10");
        vector.add("9");
        vector.add("8");
        vector.add("7");

        //将列表框添加进容器
        container.add(jl);
        setVisible(true);
        setSize(200,150);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

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

文本框

1.文本框`

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

public class TextFieldDemo extends JFrame {
    public void init(){
        //创建文本框
        JTextField jtextField1 = new JTextField();
        //得到容器
        Container container = getContentPane();
        //将文本框添加进容器
        container.add(jtextField1);
        setVisible(true);
        setSize(200,150);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

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

2.密码框

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

public class JpassworldFieldDemo extends JFrame {
    public void init(){
        //创建密码框
        JPasswordField jPasswordField = new JPasswordField();
        //设置代替密码的字符
        jPasswordField.setEchoChar('*');
        //得到容器
        Container contentPane = getContentPane();
        //将密码框添加进容器
        contentPane.add(jPasswordField);
        setVisible(true);
        setSize(100,70);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }

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

3.文本域

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

public class JTextAreaDemo extends JFrame {
    public void init(){
        //创建文本域
        JTextArea jTextArea = new JTextArea(50,50);
        //创建Scroll面板，将文本域添加进面板
        JScrollPane scrollPane = new JScrollPane(jTextArea);
        //获得容器
        Container contentPane = getContentPane();
        //将面板添加进容器
        contentPane.add(scrollPane);
        setVisible(true);
        setSize(200,100);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }

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