hai friend.....
This is a simple method....
change according to the rate....

import java.io.*;
class Currency
{
public static void main(String args[]) throws Exception
{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
int ch=0;
float val;
System.out.println("Enter The Option for Currency");
System.out.println("1. DOLLAR \n 2.SWISS \n 3.EURO \n 4.MEXICAN");
ch=Integer.parseInt(br.readLine());
System.out.println("Enter the money: ");
String s=br.readLine();
val=Float.valueOf(s.trim()).floatValue();
switch(ch)
{
case 1:System.out.println("SWISS "+val*1.2);

System.out.println("EURO "+val*1.8);
System.out.println("MEXICAN "+val*1.3);
break;
case 2:System.out.println("DOLLAR "+val*0.8);

System.out.println("EURO "+val*1.8);
System.out.println("MEXICAN "+val*1.3);
break;
case 3:System.out.println("DOLLAR "+val*0.8);

System.out.println("SWISS "+val*1.8);
System.out.println("MEXICAN "+val*1.3);
break;
case 4:System.out.println("DOLLAR "+val*0.8);

System.out.println("EURO "+val*1.8);
System.out.println("SWISS "+val*1.3);
break;
default:System.out.println("ERROR");
}
}
}

thanks and regards
prashu
[email protected]