Program to read data using Console class and display data in Java

// Program to read data using Console class and display data.
import java.io.*;
class Swap5
{
public static void main( String args[ ] ) throws IOException
{
 int  a=0, b=0, t;
 Console cn = System.console();
 
 a = Integer.parseInt( cn.readLine( " Enter first Number : " ));
 b = Integer.parseInt( cn.readLine( " Enter second Number : " ));

 System.out.println( " Before Swapping : " + a + "   " + b );
 
 a = a + b;
 b = a - b;
 a = a - b;
 
 System.out.println( " After Swapping : " + a + "   " + b );
}
}

Output:
Enter first Number : 100
Enter second Number : 200
Before Swapping : 100  200
After Swapping  : 200  100