package  test;

 import  java.awt.event.ActionEvent;
 import  java.awt.event.ActionListener;

 import  javax.swing.Box;
 import  javax.swing.BoxLayout;
 import  javax.swing.JComboBox;
 import  javax.swing.JFrame;

 public   class  FrameTest  extends  JFrame  implements  ActionListener{
	/**
	 * 
	 */
	 private   static   final   long  serialVersionUID = 1L;
	 private  String[] values = { "A","B","C","D" };
	 private  JComboBox   combo1= new  JComboBox(values);
	 private  JComboBox   combo2= new  JComboBox(values);

	/**
	 * @param args
	 */
	 public   static   void  main(String[] args) {
		// TODO Auto-generated method stub
		FrameTest ft= new  FrameTest();
		ft.pack();
		ft.setVisible(true);
	}
	 public  FrameTest(){
		 super ("combo test");
		 this .setDefaultCloseOperation(DISPOSE_ON_CLOSE);
		 this .getContentPane().setLayout( new  BoxLayout( this .getContentPane(),BoxLayout.X_AXIS));
		combo1.addActionListener( this );		
		combo2.addActionListener( this );
		combo2.setSelectedIndex( 1 );
		 this .getContentPane().add(combo1);
		 this .getContentPane().add(Box.createHorizontalStrut( 10 ) );		
		 this .getContentPane().add(combo2);		
		}
	/***/
	 public   void  actionPerformed(ActionEvent e){
		 if (e.getModifiers()== 0 )
			 return ;
		 if (e.getSource().equals(combo1))
			 this .setComboValue(combo2,combo1.getSelectedItem());
		 if (e.getSource().equals(combo2))
			 this .setComboValue(combo1,combo2.getSelectedItem());			
		}
	/***/
	 private   void  setComboValue(JComboBox combo,Object value){
		System.out.println("this is set "+value);
		 for ( int  i= 0 ;i<combo.getItemCount();i++)
			 if (combo.getItemAt(i).equals(value)){
				combo.setSelectedIndex(i);
				 break ;
				}
		}
	
	
}