resultviewer.java

自己用Java写的一个mp3文件改名的小工具

import java.util.Observable;
import java.util.Observer;
import java.awt.BorderLayout;
import javax.swing.JPanel;

/**
 *  Description of the Class
 *
 * @author     kilo
 * @created    2003年12月22日
 */
public abstract class ResultViewer
		 extends JPanel
		 implements Observer {
	/**
	 *  Description of the Field
	 */
	protected DataManager dataManager;


	/**
	 *  Constructor for the ResultViewer object
	 *
	 * @param  d                         Description of the Parameter
	 * @exception  NullPointerException  Description of the Exception
	 */
	public ResultViewer( DataManager d )
		throws NullPointerException {
		super.setLayout( new BorderLayout() );
		if ( d == null )
			throw new NullPointerException();
		dataManager = d;
		dataManager.addObserver( this );
	}


	/**
	 *  Gets the dataManager attribute of the ResultViewer object
	 *
	 * @return    The dataManager value
	 */
	public final DataManager getDataManager() {
		return dataManager;
	}


	/**
	 *  Description of the Method
	 *
	 * @param  observable  Description of the Parameter
	 * @param  object      Description of the Parameter
	 */
	public final void update( Observable observable, Object object ) {
		updateDisplay();
	}


	/**
	 *  Description of the Method
	 */
	protected abstract void updateDisplay();
}