GUI编程

03 Swing

3.5 JButton

1. 图片置于按钮之上的JButton：

package com.duo.lesson05;

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

public class JButtonDemo01 extends JFrame {
    public JButtonDemo01() {
        Container contentPane = getContentPane();

        URL url = JButtonDemo01.class.getResource("通用头像.jpg");
        assert url != null;
        ImageIcon imageIcon = new ImageIcon(url);

        JButton jButton = new JButton();
        jButton.setIcon(imageIcon);
        jButton.setToolTipText("Fire");

        contentPane.add(jButton);

        setTitle("JButton测试窗口");
        setVisible(true);
        setSize(650, 500);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JButtonDemo01();
    }
}

运行结果：

如上所示，当鼠标悬浮于按钮之上时，会有tip显示。

2. 单选按钮 & 多选按钮

• 单选按钮JRadioButton：

package com.duo.lesson05;

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

public class JButtonDemo02 extends JFrame {
    public JButtonDemo02() {
        Container contentPane = getContentPane();
        //单选按钮框，只能选择一个。通常要对按钮进行分组
        JRadioButton jRadioButton1 = new JRadioButton("按钮1");
        JRadioButton jRadioButton2 = new JRadioButton("按钮2");
        JRadioButton jRadioButton3 = new JRadioButton("按钮3");
        ButtonGroup buttonGroup = new ButtonGroup();
        buttonGroup.add(jRadioButton1);
        buttonGroup.add(jRadioButton2);
        buttonGroup.add(jRadioButton3);

        contentPane.add(jRadioButton1, BorderLayout.NORTH);
        contentPane.add(jRadioButton2, BorderLayout.CENTER);
        contentPane.add(jRadioButton3, BorderLayout.SOUTH);

        setTitle("单选按钮测试窗口");
        setVisible(true);
        setSize(650, 500);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

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

运行结果：

• 多选按钮JCheckBox：

package com.duo.lesson05;

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

public class JButtonDemo03 extends JFrame {
    public JButtonDemo03() {
        Container contentPane = getContentPane();

        //多选按钮框
        JCheckBox jCheckBox1 = new JCheckBox("A");
        JCheckBox jCheckBox2 = new JCheckBox("B");

        contentPane.add(jCheckBox1, BorderLayout.NORTH);
        contentPane.add(jCheckBox2, BorderLayout.SOUTH);

        setTitle("多选按钮测试窗口");
        setVisible(true);
        setSize(650, 500);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

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

运行结果：

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