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.

Charlie Frank

Charlie has over a decade of experience in website administration and technology management. As the site admin, he oversees all technical aspects of running a high-traffic online platform, ensuring optimal performance, security, and user experience.