calculatorclient.java

J2EE之EJB,RMI多个源码

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;

public class CalculatorClient extends JFrame
{
	public static int w=500;
	public static int h=95;
	public static String str="Earnest Bank Welcomes You";
	Container c;
	
	JLabel l,result;
	JTextField t;
	JButton b;
	
	public static String value;
	public static double dbl;
	public static double amt;

	public CalculatorClient()
	{
		super(str);
		
		//The UI
		c=getContentPane();
		c.setLayout(new GridLayout(2,2,2,2));

		l=new JLabel("Enter the amount in Dollars($)");
		c.add(l);
		
		t=new JTextField(10);
		c.add(t);
		
		b=new JButton("Calculate");
		c.add(b);
		
		result=new JLabel();
		c.add(result);
		value=t.getText();	
		b.addActionListener(new addEvent());
		setSize(w,h);
		show();	
	}
	public class addEvent implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			value=t.getText();
			dbl=Double.parseDouble(value);
			try
			{
				Context ic = new InitialContext();
		        	Object obj = ic.lookup("CalculatorJNDI");
		        	CalculatorHome home = (CalculatorHome)PortableRemoteObject.narrow(obj,CalculatorHome.class);
				Calculator calc = home.create();
           			amt = calc.dollarToRs(dbl);
           			result.setText("Result(Rs.): "+String.valueOf(amt));
			}
      			catch (Exception ex)
			{
		        	System.err.println("Caught an unexpected exception!");
		        	ex.printStackTrace();
       			}
			
		}
	}
	public static void main(String args[])
	{
		CalculatorClient m=new CalculatorClient();
	}
}