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：