Passing Primitive Data by Reference

Passing Primitive Data by Reference

Primitive datatypes in Java are always a passby value. You can pass them by reference, by wrapping the data in to single element array. Here is the code (Tested on Java 1.2) :

 public class PassByReferance {	public static void main(String args[]){		double value = 1234.000;		PassByReferance.manipulate(value);		System.out.println(" Value of Double is : " + value);		// No Change		// Will Print : Value of Double is : 1234.0		double[] wrapper = new double[1];		wrapper[0] = value;		PassByReferance.manipulate(wrapper);		System.out.println(" Value of Doubleis : " + wrapper[0]);		// Data Changed		// Will Print : Value of Double is : 6170.0	}	static void manipulate(double[] data){		data[0] = data[0] * 5;	}	static void manipulate(double data){		data = data * 5;	}}

You can also try this with other datatypes.


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