Program to Implement the Basic Functionality of a Calculator using Switch

Program to Implement the Basic Functionality of a Calculator
using Switch
import java.io.DataInputStream;
class Cal
{
public static void main(String args[])
{
DataInputStream pt=new DataInputStream(System.in);
int x,y,z,ch;
try
{
System.out.println("Enter Value of X:");
x = Integer.parseInt(pt.readLine());
System.out.println("Enter Value of Y:");
y = Integer.parseInt(pt.readLine());
System.out.println("1.Addition\n2.Subtraction
\n3.Multiplication\n4.Division");
System.out.println("Enter ur choice:");
ch = Integer.parseInt(pt.readLine());
switch(ch)
{
case 1:
z = x + y;
System.out.println("The Addition is:"+z);
break;
case 2:
z = x - y;
System.out.println("The Subtraction
is:"+z);
break;

case 3:
z = x * y;
System.out.println("The Multiplication
is:"+z);
break;
case 4:
z = x / y;
System.out.println("The Division is:"+z);
break;
default:
System.out.println("Sorry Try
Again.........");
break;
}
}
catch(Exception e)
{
System.out.println("x.getmessage()");
}
}
}