java实用教程——组件及事件处理——设置组件的位置(相对于窗口具体位置和布局)

快来打我* 2022-09-04 08:54 169阅读 0赞

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzUwNjc1ODEz_size_16_color_FFFFFF_t_70]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzUwNjc1ODEz_size_16_color_FFFFFF_t_70 1]

1：  
相对于窗口的具体位置

关键点：  
JButton组件添加到JPanel时，如果想自己位置，需要对JPanel进行如下设置，才能自定义按钮位置  
需要将组件添加到画板上去，才可以设置组件的相对具体位置

button1.setBounds(20, 200, 100, 100);//按钮的位置为(20,200),大小为（100,100）

import javax.swing.*;
    import java.awt.*;
    
    public class win extends JFrame{
        
    
    	public static void main(String []args)
    	{
        
    		win w = new win();
    	}
    	public win()
    	{
        
    		init();
    		this.setTitle("多个组件的位置相对于窗口的具体位置");
    		this.setBounds(100,200,500,500);
    		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    		this.setVisible(true);
    		
    	}
    	public void init()
    	{
        
    		
    		JPanel panel1 = new JPanel();
    		panel1.setLayout(null);
    		
    		JButton button1= new JButton("JButton1");
    		button1.setForeground(Color.BLUE);//设置按钮的颜色
    		button1.setBounds(20, 200, 100, 100);//按钮的位置为(20,200)
    		//大小为（100,100）
    		panel1.add(button1);
    		
    		JButton button2= new JButton("JButton2");
    		button2.setForeground(Color.GREEN);
    		button2.setBounds(20, 50, 100, 100);
    		panel1.add(button2);
    		
    		this.add(panel1);
    		
    	}
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzUwNjc1ODEz_size_16_color_FFFFFF_t_70 2]

建立两个面板  
在面板上进行按钮位置的操作

2：  
边界布局

import java.awt.*;
    import javax.swing.*;
    public class win extends JFrame{
        
    	
    	public static void main( String [] args)
    	{
        
    		win w = new win();
    	}
    	public win()
    	{
        
    		init();
    		this.setTitle("多个组件的位置");
    		this.setBounds(200,200,500,300);
    		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    		this.setVisible(true);
    		
    	}
    	public void init()
    	{
        
    		//设置窗口的背景颜色
    		Container con=this.getContentPane();//得到内容窗格
    		con.setBackground(Color.gray);
    		
    		
    		//设置整体布局 
    		this.setLayout(new BorderLayout(10,10));
    		
    		//设置两个画板
    		JPanel panel1 = new JPanel(new BorderLayout(5,5));
    		JButton button1= new JButton("JButton1");
    		button1.setForeground(Color.BLUE);//设置按钮的颜色
    		panel1.add(button1,BorderLayout.EAST);//将按钮添加到画板1中去
    		
    		JButton button2= new JButton("JButton2");
    		button2.setForeground(Color.GREEN);
    		panel1.add(button2,BorderLayout.CENTER);
    		
    		JButton button3= new JButton("JButton3");
    		button3.setForeground(Color.pink);
    		panel1.add(button3,BorderLayout.NORTH);
    		
    		JButton button4= new JButton("JButton4");
    		button4.setForeground(Color.ORANGE);
    		panel1.add(button4,BorderLayout.SOUTH);
    		
    		JButton button5= new JButton("JButton5");
    		panel1.add(button5,BorderLayout.WEST);
    		
    		//画板2
    		JPanel panel2 = new JPanel(new BorderLayout(5,5));
    		JTextField text = new JTextField(10);
    		JLabel label = new JLabel("标签:代码书写者");
    		panel2.add(text,BorderLayout.NORTH);
    		panel2.add(label,BorderLayout.SOUTH);
    		
    		//将两个画板添加到窗口中去
    		this.add(panel1,BorderLayout.NORTH);
    		this.add(panel2,BorderLayout.SOUTH);
    		
    	}
    
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzUwNjc1ODEz_size_16_color_FFFFFF_t_70 3]  
3：  
将窗口的布局更改为流式布局后，在窗口上就可以添加多个组件了

import javax.swing.*;
    import java.awt.*;
    
    public class win extends JFrame{
        
    
    	public static void main(String []args)
    	{
        
    		win w = new win();
    	}
    	public win()
    	{
        
    		init();
    		this.setTitle("多个组件的位置相对于窗口的具体位置");
    		this.setBounds(100,200,500,500);
    		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    		this.setVisible(true);
    		
    	}
    	public void init()
    	{
        
    		
    		this.setLayout(new FlowLayout());
    
    		this.setLayout(null);
    		
    		JButton button1= new JButton("JButton1");
    		button1.setForeground(Color.BLUE);//设置按钮的颜色
    		button1.setBounds(20, 200, 100, 100);
    		this.add(button1);
    		
    		JButton button2= new JButton("JButton2");
    		button2.setForeground(Color.GREEN);
    		button2.setBounds(20, 50, 150, 150);
    		this.add(button2);
    		
    
    		
    	}
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzUwNjc1ODEz_size_16_color_FFFFFF_t_70 4]

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzUwNjc1ODEz_size_16_color_FFFFFF_t_70 1]: /images/20220829/37ae82c18a964756af392d331430a64a.png
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