编辑代码

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

public class Example11_3 {
	public static void main(String[] args) {
		ComponentInWindow win = new ComponentInWindow();
        win.setBounds(100,100,310,260);
        win.setTitle("常用组件");
	}
}

public class ComponentInWindow extends JFrame{
    JTextField text;
    JButton button;
    JCheckBox checkBox1,checkBox2,checkBox3;
    JRadioButton radio1,radio2;
    ButtonGroup group;
    JComboBox comBox;
    JTextArea area;
    public ComponentInWindow(){
        init();
        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    void init(){
        setLayout(new FlowLayout());
        add(new JLabel("文本框"));
        text = new JTextField(10);
        add(text);
        add(new JLabel("按钮："));
        button = new JButton("确定"");
        add(button);
        add(new JLabel("选择框：""));
        checkBox1 = new JCheckBox("喜欢音乐");
        checkBox2 = new JCheckBox("喜欢旅游");
        checkBox3 = new JCheckBox("喜欢篮球");
        add(checkBox1);
        add(checkBox2);
        add(checkBox3);
        add(new JLabel("单选按钮："));
        group = new ButtonGroup();
        radio1 = new JRadioButton("男");
        radio2 = new JRadioButton("女");
        group.add(radio1);
        group.add(radio2);
        add(new JLabel("下拉列表："));
        comBox = new JComboBox();
        comBox.addItem("音乐天地");
        comBox.addItem("武术天地");
        comBox.addItem("象棋乐园");
        add(comBox);
        add(new JLabel("文本区："));
        area= new JTextArea(6,12);
        add(new JScrollPane(area));
    }
}