Java中利用Swing构建一个简单的窗口(四)——使用BorderLayout布局

忘是亡心i 2024-04-18 22:57 67阅读 0赞

# 简介 #

BorderLayout把容器分成五个部分：东南西北中，用add(Component,index)方法可以把组件添加到BorderLayout之中，index的取值有BorderLayout.EAST,BorderLayout.NORTH,BorderLayout.WEST,BorderLayout.SOUTH,BorderLayout.CENTER。

# 效果 #

![在这里插入图片描述][20190913123740890.png]

# 代码 #

package Test;
    
    import javax.swing.*;
    import java.awt.*;
    
    public class TestFrame extends JFrame{
        
            public TestFrame(){
        
                setLayout(new BorderLayout(5,10));
    
                add(new JButton("East"),BorderLayout.EAST);
                add(new JButton("North"),BorderLayout.NORTH);
                add(new JButton("West"),BorderLayout.WEST);
                add(new JButton("South"),BorderLayout.SOUTH);
                add(new JButton("Center"),BorderLayout.CENTER);
    
            }
    
        public static void main(String[] args) {
        
            TestFrame frame=new TestFrame();
            frame.setTitle("ShowBorderLayout");
            frame.setSize(300,200);
            frame.setLocationRelativeTo(null);
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.setVisible(true);
        }
    }
    public TestFrame(){
        
                setLayout(new BorderLayout(5,10));
    
                add(new JButton("East"),BorderLayout.EAST);
                add(new JButton("North"),BorderLayout.NORTH);
                add(new JButton("West"),BorderLayout.WEST);
                add(new JButton("South"),BorderLayout.SOUTH);
            }
    
        public static void main(String[] args) {
        
            TestFrame frame=new TestFrame();
            frame.setTitle("ShowBorderLayout");
            frame.setSize(300,200);
            frame.setLocationRelativeTo(null);
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.setVisible(true);
        }
    }

# 注意 #

如果把东区删除，会发现中区会向右延伸占据东区，效果如下：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNTc2MDI4_size_16_color_FFFFFF_t_70]

[20190913123740890.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/c871ad0e4daf47739edbb8adc1734071.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNTc2MDI4_size_16_color_FFFFFF_t_70]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/222137c6d3764318afec83b47a7fd625.png