java中Swing五種常見的佈局方式

1、 邊界佈局（BorderLayout）

2、流式佈局（FlowLayout）

3、網格佈局（GridLayout）

4、盒子佈局（BoxLaYout）

5、空佈局（null）

還有其他兩種佈局，分別是GridBagLayout（網格包佈局）、CardLayout（卡片佈局）

注意：JFrame和JDialog默認佈局為BorderLayout，JPanel和Applet默認佈局為FlowLayout

邊界佈局示例代碼：

 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("邊界佈局"); 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：

流式佈局示例代碼：

 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("流式佈局"); 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：

網格佈局示例代碼：

 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("表格佈局");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5this.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：

盒子佈局示例代碼：

 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("表格佈局");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.createHorizo​​ntalStrut(10)); //採用x佈局時，添加固定寬度組件隔開//this.getContentPane().add(Box.createVerticalStrut(5)); //採用y佈局時，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：

空佈局示例代碼：

 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("空佈局");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50btn2.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：