Object Oriented Programming Through Java by Pearson

Type Conversion and Type Casting 3.9

Swapping variables without using a third variable: In the method SwapVars() of Example

3.2, we have used a third variable called temp to swap the variable. Can we achieve the same

result without using the third variable? Refer to the code segment shown below:

1.

public void SwapVars(int x , int y){ // suppose x=10 & y=100

2. x=x+y; // x now becomes 110

3. y=x-y; // y now becomes 110-100 =10

4. x=x-y; // y now becomes 110-10 = 100

5. System.out.print(“X&Y vars inside Swap Method afetr swap-

ping”);

6. System.out.println(“ X = “ +x + “ Y = “ + y);}

7. }

This code is more efficient as we have not used a third variable.

3.6 Arithmetic Operators

The basic (also known as intrinsic) operators are

+ addition