Java GUI crazy god said series summary (12)

1. Single selection box

//这是我自己的包
package GUI;
//导入必要的包  
import java.awt.*;
import java.awt.event.*;
import java.net.URL;
import javax.swing.*;
public class TestDemo extends JFrame {
    
    
	
	public TestDemo(){
    
    
		//得到这个容器
		 Container container = this.getContentPane();
		 
		 //新建三个按钮
		 JRadioButton radiobutton1 = new JRadioButton("JAVA");
		 JRadioButton radiobutton2 = new JRadioButton("PYTHON");
		 JRadioButton radiobutton3 = new JRadioButton("C++");
		 
		 //因为是单选框,所以要将他们分组
		 ButtonGroup group = new ButtonGroup();
		 group.add( radiobutton1);
		 group.add( radiobutton2);
		 group.add( radiobutton3);
		 
		 //再将这些按钮添加到container上
		 container.add(radiobutton1,BorderLayout.NORTH);
		 container.add(radiobutton2,BorderLayout.CENTER);
		 container.add(radiobutton3,BorderLayout.SOUTH);
		 
		 //设置大小及可见性
		 setBounds(300,300,400,400);
		 setVisible(true);
	}
 
public static void main(String[] args) {
    
    
		new TestDemo();
	}
}

Two, check box

//这是我自己的包
package GUI;
//导入必要的包  
import java.awt.*;
import java.awt.event.*;
import java.net.URL;
import javax.swing.*;
public class TestDemo extends JFrame {
    
    
	
	public TestDemo(){
    
    
		//得到这个容器
		 Container container = this.getContentPane();
		 
		 //新建两个按钮
		 JCheckBox checkbox1 = new JCheckBox("Python");
		 JCheckBox checkbox2 = new JCheckBox("Java");
		 
		//放到这个容器里面去
		container.add(checkbox1,BorderLayout.SOUTH);
		container.add(checkbox2,BorderLayout.NORTH);
		 
		 //设置大小及可见性
		 setBounds(300,300,400,400);
		 setVisible(true);
	}
 
public static void main(String[] args) {
    
    
		new TestDemo();
	}
}