Java program to swap two numbers

Program:

class Swap{
int a=3,b=5,temp;
void swapNumbers()
{
System.out.println("Before Swapping a="+a+" b="+b);
temp=a;
a=b;
b=temp;
System.out.println("After Swapping a="+a+" b="+b);
}
public static void main(String[] args)
{
Swap S1= new Swap();
S1.swapNumbers();
}
}

Output:

Before Swapping a=3 b=5

After Swapping a=5 b=3