Aravind @ Software AG

change to Chennai....and hav just stepped into Software AG..... left out in a new world and trying to grab the walls over here...fairly interesting stuffz... to know more about Software AG.... visit softwareag

Swapping two values without a temp variable.....

Itz done by using XOR Operator...
int a = 2, b = 3;
a ^= b;
b ^= a;
a ^= b;
System.out.println("A Value : " + a + " : " + "B Value : " +b);

a^=b ---> 010(2) ^ 011(3) ---> 001(1) ---> a = 1
b^=a ---> 011(3) ^ 001(1) ---> 010(2) ---> b = 2
a^=b ---> 001(1) ^ 010(2) ---> 011(3) ---> a = 3

Try this out......

How to make an Class immutable...?

Class should be declared final with all members declared as private and no setter methods....
Immutable class in the sense...the content in the Object of the class can't be changed..