Java GUI之五大布局

1.默认布局FlowLayout

public class SetFlowLayout {
   JFrame frame;
   JButton[] button;

   SetFlowLayout() {
      frame = new JFrame();
      frame.setLayout(new FlowLayout());
      button = new JButton[3];
      for (int i = 0; i < 3; i++) {
         button[i] = new JButton("" + i);
         frame.add(button[i]);
      }
      frame.setBounds(350, 100, 500, 500);
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.setVisible(true);
   }

   public static void main(String[] args) {
      new SetFlowLayout();
   }
}

2.BorderLayout

public class SetBorderLayout {
   JFrame frame;
   JButton[] button;

   public SetBorderLayout() {
      // TODO Auto-generated constructor stub
      frame = new JFrame();
      frame.setTitle("BorderLayout");
      frame.setLayout(new BorderLayout());
      button = new JButton[5]; // 先分配数组空间范围
      button[0] = new JButton("北");
      frame.add(button[0], BorderLayout.NORTH);
      button[1] = new JButton("南");
      frame.add(button[1], BorderLayout.SOUTH);
      button[2] = new JButton("东");
      frame.add(button[2], BorderLayout.EAST);
      button[3] = new JButton("西");
      frame.add(button[3], BorderLayout.WEST);
      button[4] = new JButton("中");
      frame.add(button[4], BorderLayout.CENTER);
      frame.setBounds(350, 100, 500, 500);
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.setVisible(true);
   }

   public static void main(String[] args) {
      new SetBorderLayout();
   }
}

3.BoxLayout

public class SetBoxLayout extends JFrame {
   private static final long serialVersionUID = 1L;

   public SetBoxLayout() {
      setLayout(new BoxLayout(getContentPane(), BoxLayout.LINE_AXIS));
      getContentPane().setBackground(Color.green);
      add(new Button("123"));
      add(new Button("123"));
      add(new Button("123"));
      setVisible(true);
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      setBounds(100, 50, 700, 400);
   }

   public static void main(String[] args) {
      new SetBoxLayout();
   }
}

4.卡片布局CardLayout

public class SetCardLayout {
   public static void main(String[] args) {
      JFrame f = new JFrame();
      CardLayout card = new CardLayout();
      f.setLayout(card);
      Container c = f.getContentPane();
      JButton[] b = new JButton[6];
      for (int i = 0; i < b.length; i++) {
         b[i] = new JButton("第" + (i + 1) + "页");
         c.add(b[i], "page" + (i + 1));
      }
      b[0].setBackground(Color.blue);
      b[1].setBackground(Color.yellow);
      b[2].setBackground(Color.red);
      b[3].setBackground(Color.green);
      b[4].setBackground(Color.orange);
      b[5].setBackground(Color.pink);
      f.setSize(300, 300);
      f.setVisible(true);
      card.show(c, "1");
      while (true) {
         try {
            Thread.sleep(1000);
         } catch (InterruptedException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
         }
         card.next(c);
      }
      /*
       * for (int i = 0; i < 6; i++) { try { while (true) {
       * Thread.sleep(1000); card.next(c); } } catch (InterruptedException e)
       * { e.printStackTrace(); } }
       */
   }
}

5.网格布局GridLayout

public class SetGridLayout {
   JFrame frame;
   JButton[] button;

   public SetGridLayout() {
      // TODO Auto-generated constructor stub
      frame = new JFrame();
      frame.setLayout(new GridLayout(3, 4, 1, 1));
      /*
       * GridLayout( ); 第一个、二哥参数表示网格分成的行、列， 第三个、四个参数表示网格之间的横纵间距
       */
      button = new JButton[12];
      for (int i = 0; i < 12; i++) {
         button[i] = new JButton("" + i); // " "+1将数字转换成字符串“1”
         frame.add(button[i]);
      }
      frame.setBounds(350, 100, 500, 500);
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.setVisible(true);
   }

   public static void main(String[] args) {
      new SetGridLayout();
   }
}