numcaculate.java

j2ee关于BEANS的多个例子

import javax.swing.*;

public class NumCaculate
{
	JFrame frm;
	NumBean nb;
	
	public NumCaculate()
	{
		frm=new JFrame("Test number bean");
		nb=new NumBean();
		frm.getContentPane().add(nb);
		NumEventAction nea=new NumEventAction();
		nb.addNumListener(nea);
		frm.setSize(200,200);
		frm.setVisible(true);
	}
	
	public static void main(String args[])
	{
		new NumCaculate();
	}
	
	class NumEventAction implements NumListener
	{
		public void calResult(NumEvent evt)
		{
			Object obj=evt.getSource();
			if (obj==nb)
			{
				int res=evt.num1*evt.num2;
				JOptionPane.showMessageDialog(frm,"结果是:"+String.valueOf(res));
			}
		}
		
	}
}