java中Swing五种常见的布局方式

1、 边界布局（BorderLayout）

2、流式布局（FlowLayout）

3、网格布局（GridLayout）

4、盒子布局（BoxLaYout）

5、空布局（null）

还有其他两种布局，分别是GridBagLayout（网格包布局）、CardLayout（卡片布局）

注意：JFrame和JDialog默认布局为BorderLayout，JPanel和Applet默认布局为FlowLayout

边界布局示例代码：

import java.awt.BorderLayout;

import javax.swing.JButton;
import javax.swing.JFrame;

public class BorderLayoutExample extends JFrame{
  JButton btn1=new JButton("东");
  JButton btn2=new JButton("南");
  JButton btn3=new JButton("西");
  JButton btn4=new JButton("北");
  JButton btn5=new JButton("中");
  BorderLayoutExample(){
    init();
    this.setTitle("边界布局");
    this.setResizable(true);
    this.setSize(200, 200);
    this.setLocationRelativeTo(null);
    this.setDefaultCloseOperation(EXIT_ON_CLOSE);
    this.setVisible(true);
  }
  void init(){
    this.setLayout(new BorderLayout(10,5)); //默认为0，0；水平间距10，垂直间距5
    this.add(btn1,BorderLayout.EAST);
    this.add(btn2,BorderLayout.SOUTH);
    this.add(btn3,BorderLayout.WEST);
    this.add(btn4,BorderLayout.NORTH);
    this.add(btn5,BorderLayout.CENTER);
  }
  public static void main(String args[]){
    new BorderLayoutExample();
  }
}

运行结果：

流式布局示例代码：

import java.awt.FlowLayout;

import javax.swing.JButton;
import javax.swing.JFrame;

public class FlowLayoutExample extends JFrame{
  JButton btn1=new JButton("one");
  JButton btn2=new JButton("two");
  JButton btn3=new JButton("three");
  JButton btn4=new JButton("four");
  JButton btn5=new JButton("five");
  FlowLayoutExample(){
    init();
    this.setTitle("流式布局");
    this.setResizable(true);
    this.setSize(200, 200);
    this.setLocationRelativeTo(null);
    this.setDefaultCloseOperation(EXIT_ON_CLOSE);
    this.setVisible(true);
  }
  void init(){
    this.setLayout(new FlowLayout(FlowLayout.LEFT,10,5)); //默认为居中;水平间距10，垂直间距5
    this.add(btn1);
    this.add(btn2);
    this.add(btn3);
    this.add(btn4);
    this.add(btn5);
  }
  public static void main(String args[]){
    new FlowLayoutExample();
  }
}

运行结果：

网格布局示例代码：

import java.awt.GridLayout;

import javax.swing.JButton;
import javax.swing.JFrame;

public class GridLayoutExample extends JFrame{
	JButton btn1=new JButton("one");
	JButton btn2=new JButton("two");
	JButton btn3=new JButton("three");
	JButton btn4=new JButton("four");
	JButton btn5=new JButton("five");
	GridLayoutExample(){
		init();
		this.setTitle("表格布局");
		this.setResizable(true);
		this.setSize(300, 200);
		this.setLocationRelativeTo(null);
		this.setDefaultCloseOperation(EXIT_ON_CLOSE);
		this.setVisible(true);
	}
	void init(){
		this.setLayout(new GridLayout(2,3,10,5)); //默认为1行，n列；2行3列，水平间距10，垂直间距5
		this.add(btn1);
		this.add(btn2);
		this.add(btn3);
		this.add(btn4);
		this.add(btn5);
	}
	public static void main(String args[]){
		new GridLayoutExample();
	}
}

运行结果：

盒子布局示例代码：

import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;

public class BoxLaYoutExample extends JFrame{
	JButton btn1=new JButton("one");
	JButton btn2=new JButton("two");
	JButton btn3=new JButton("three");
	JButton btn4=new JButton("four");
	JButton btn5=new JButton("five");
	BoxLaYoutExample(){
		init();
		this.setTitle("表格布局");
		this.setResizable(true);
		this.setSize(300, 200);
		this.setLocationRelativeTo(null);
		this.setDefaultCloseOperation(EXIT_ON_CLOSE);
		this.setVisible(true);
	}
	void init(){
		this.setLayout(new BoxLayout(this.getContentPane(),BoxLayout.X_AXIS));
		//可以使用Box容器代替
		//Box box = new Box(BoxLayout.Y_AXIS);box.add(btn...);box.add(creat..);
		this.add(btn1);
		this.add(btn2);
		this.getContentPane().add(Box.createHorizontalStrut(10)); //采用x布局时，添加固定宽度组件隔开
		//this.getContentPane().add(Box.createVerticalStrut(5)); //采用y布局时，添加固定高度组件隔开
		this.add(btn3);
		this.add(btn4);
		this.add(btn5);
	}
	public static void main(String args[]){
		new BoxLaYoutExample();
	}
}

运行结果：

空布局示例代码：

import javax.swing.JButton;
import javax.swing.JFrame;

public class NullLayoutExample extends JFrame{
	JButton btn1=new JButton("one");
	JButton btn2=new JButton("two");
	JButton btn3=new JButton("three");
	JButton btn4=new JButton("four");
	JButton btn5=new JButton("five");
	NullLayoutExample(){
		init();
		this.setTitle("空布局");
		this.setResizable(true);
		this.setSize(300, 300);
		this.setLocationRelativeTo(null);
		this.setDefaultCloseOperation(EXIT_ON_CLOSE);
		this.setVisible(true);
	}
	void init(){
		this.setLayout(null);
		btn1.setBounds(10, 0, 100, 50); //x坐标10，y坐标0，组件宽100，高50
		btn2.setBounds(20, 50, 100, 50);
		btn3.setBounds(30, 100, 100, 50);
		btn4.setBounds(40, 150, 100, 50);
		btn5.setBounds(50, 200, 100, 50);
		this.add(btn1);
		this.add(btn2);
		this.add(btn3);
		this.add(btn4);
		this.add(btn5);
		
	}
	public static void main(String args[]){
		new NullLayoutExample();
	}
}

运行结果：