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How to swap variable values in Java ME using bitwise operations

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[[Category:General Programming on Java ME]][[Category:Code Snippet]]
 
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Revision as of 06:28, 15 August 2013

Article Metadata
Article
Created: giridharn (23 May 2007)
Last edited: hamishwillee (15 Aug 2013)


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 quite optimized. It does not use any temporary variables. Secoundly it uses bitwise operators which also do internally require temp varibales to do the operation. And thirdly it will be faster than the normal swap operations as bitwise operations are considered to be faster then other normal operations.

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