JAVAレイアウトマネージャ

import java.awt.Color;

import java.awt.*;

import javax.swing.*;



public class JustCode {

	



	public static class IntroPanel extends JPanel{



		public IntroPanel(){

			setBackground (Color.green);

			JLabel l1 = new JLabel ("Layout Manger Demonstration");

			JLabel l2 = new JLabel ("Choose a tab to see an example of a layout manager.");

			add(l1);

			add(l2);

		}

	}

	

	//       

	public static class FlowPanel extends JPanel{

		

		public FlowPanel(){

			setLayout (new FlowLayout());

			setBackground (Color.green);

			JButton b1 = new JButton ("BUTTON 1");

			JButton b2 = new JButton ("BUTTON 2");

			JButton b3 = new JButton ("BUTTON 3");

			JButton b4 = new JButton ("BUTTON 4");

			JButton b5 = new JButton ("BUTTON 5");

			

			add(b1);

			add(b2);

			add(b3);

			add(b4);

			add(b5);		

		}

	}

	

	//    

	public static class BorderPanel extends JPanel{

		

		public BorderPanel(){

			setLayout(new BorderLayout());

			setBackground (Color.green);

			

			JButton b1 = new JButton ("BUTTON 1");

			JButton b2 = new JButton ("BUTTON 2");

			JButton b3 = new JButton ("BUTTON 3");

			JButton b4 = new JButton ("BUTTON 4");

			JButton b5 = new JButton ("BUTTON 5");

			

			add(b1,BorderLayout.CENTER);

			add(b2,BorderLayout.NORTH);

			add(b3,BorderLayout.SOUTH);

			add(b4,BorderLayout.EAST);

			add(b5,BorderLayout.WEST);		

		}

	}

	

	//    

	public static class GridPanel extends JPanel{

		public GridPanel(){

			setLayout (new GridLayout(2,3));

			setBackground(Color.green);

		

			JButton b1 = new JButton ("BUTTON 1");

			JButton b2 = new JButton ("BUTTON 2");

			JButton b3 = new JButton ("BUTTON 3");

			JButton b4 = new JButton ("BUTTON 4");

			JButton b5 = new JButton ("BUTTON 5");

			

			add(b1);

			add(b2);

			add(b3);

			add(b4);

			add(b5);	

		}

	}

	

	//    

	public static class BoxPanel extends JPanel{

		

		public BoxPanel(){

			setLayout( new BoxLayout (this, BoxLayout.Y_AXIS));

			setBackground (Color.green);

			

			JButton b1 = new JButton ("BUTTON 1");

			JButton b2 = new JButton ("BUTTON 2");

			JButton b3 = new JButton ("BUTTON 3");

			JButton b4 = new JButton ("BUTTON 4");

			JButton b5 = new JButton ("BUTTON 5");

			

			add(b1);

			add(Box.createRigidArea(new Dimension (0, 10)));

			add(b2);

			add(Box.createHorizontalGlue());

			add(b3);

			add(b4);

			add(Box.createRigidArea(new Dimension (0, 20)));

			add(b5);

		}

	}

	

	public static void main(String args[])

	{

		JFrame frame = new JFrame ("Layout Manager Demo");

		frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);

		JTabbedPane tp = new JTabbedPane();

		tp.addTab("Intro", new IntroPanel());

		tp.addTab("Flow", new FlowPanel());

		tp.addTab("Border", new BorderPanel());

		tp.addTab("Grid", new GridPanel());

		tp.addTab("Box", new BoxPanel());

		frame.getContentPane().add(tp);

		frame.pack();

		frame.show();

	}

}