java中Swing五種常見的布局方式
1、 邊界布局(BorderLayout)
2、流式布局(FlowLayout)
3、網(wǎng)格布局(GridLayout)
4、盒子布局(BoxLaYout)
5、空布局(null)
還有其他兩種布局,分別是GridBagLayout(網(wǎng)格包布局)、CardLayout(卡片布局)
注意:JFrame和JDialog默認布局為BorderLayout,JPanel和Applet默認布局為FlowLayout
邊界布局示例代碼:
import java.awt.BorderLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
public class BorderLayoutExample extends JFrame{
JButton btn1=new JButton("東");
JButton btn2=new JButton("南");
JButton btn3=new JButton("西");
JButton btn4=new JButton("北");
JButton btn5=new JButton("中");
BorderLayoutExample(){
init();
this.setTitle("邊界布局");
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)); //默認為0,0;水平間距10,垂直間距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();
}
}
運行結果:

流式布局示例代碼:
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)); //默認為居中;水平間距10,垂直間距5
this.add(btn1);
this.add(btn2);
this.add(btn3);
this.add(btn4);
this.add(btn5);
}
public static void main(String args[]){
new FlowLayoutExample();
}
}
運行結果:

網(wǎng)格布局示例代碼:
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)); //默認為1行,n列;2行3列,水平間距10,垂直間距5
this.add(btn1);
this.add(btn2);
this.add(btn3);
this.add(btn4);
this.add(btn5);
}
public static void main(String args[]){
new GridLayoutExample();
}
}
運行結果:

盒子布局示例代碼:
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布局時,添加固定寬度組件隔開
//this.getContentPane().add(Box.createVerticalStrut(5)); //采用y布局時,添加固定高度組件隔開
this.add(btn3);
this.add(btn4);
this.add(btn5);
}
public static void main(String args[]){
new BoxLaYoutExample();
}
}
運行結果:

空布局示例代碼:
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坐標10,y坐標0,組件寬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();
}
}
運行結果:

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