Swaping of Variables using third Variable in Java

// Swapping example using third variable
class  Swap
{
public static void main( String args[ ] )
{
 int  a, b, t;
 a = 10;
 b = 20; 

 System.out.print( "\nBefore Swapping :" );
 System.out.print( a + "   " + b );
 t = a;
 a = b;
 b = t;
 
 System.out.print( "\nAfter Swapping  : " );
 System.out.print( a + "   " + b );
}
}

Output:
Before Swapping :  10 20
After Swapping  : 20 10