Java2程序设计基础第十二章课后习题

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

public class exe12_6 {
	static Frame frm = new Frame("习题12-6");
	static Label label = new Label();
	static TextField tf = new TextField("文本框", 20);
	static Button btn = new Button("按钮");
	static Checkbox cb1 = new Checkbox("复选框01", true);
	static Checkbox cb2 = new Checkbox("复选框02");
	static Checkbox cb3 = new Checkbox("复选框03");
	
	static Checkbox cb_g1 = new Checkbox("单选按钮01");
	static Checkbox cb_g2 = new Checkbox("单选按钮02");
	
	public static void main(String[] args) {
		frm.setLayout(null);
		frm.setSize(300, 200);
		label.setText("标签");
		label.setAlignment(Label.CENTER);
		label.setLocation(20, 40);
		label.setSize(50, 20);
		label.setBackground(Color.yellow);
		tf.setBounds(80, 40, 110, 20);
		btn.setBounds(200, 40, 90, 20);
		
		cb1.setBounds(20, 80, 80, 20);
		cb2.setBounds(20, 100, 80, 20);
		cb3.setBounds(20, 120, 80, 20);
		
		CheckboxGroup group = new CheckboxGroup();
		
		cb_g1.setBounds(100, 80, 80, 20);
		cb_g2.setBounds(100, 100, 80, 20);
		cb_g1.setCheckboxGroup(group);
		cb_g2.setCheckboxGroup(group);
		
		frm.add(label);
		frm.add(tf);
		frm.add(btn);
		frm.add(cb1);
		frm.add(cb2);
		frm.add(cb3);
		frm.add(cb_g1);
		frm.add(cb_g2);
		frm.setVisible(true);
	}
}