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Revision as of 05:59, 23 May 2007 by giridharn (Talk | contribs)

How to swap variable values in Java ME using bitwise operations

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How to swap variable values using bitwise operations.

Heres a sample code that swaps 2 variable values

class test 
{
public static int a = 10,b = 20;
public static void main(String[] args)
{
test t = new test();
t.swap();
}
 
public void swap(){
a= a^b;
b = b^a;
a = a^b;
System.out.println("a "+a+" b "+b);
}
}

The above code can be considered as much more optimized in terms of other swapping code it does not use any temp variables,secoundly it uses bitwise operators which also do internally require temp varibales to do the operation and thirdly it will be faster then the normal swap operations as bitwise operations are considered to be faster then other normal operations.

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