Variables in Java are passed by value. If the variable contains a reference
(not a primitive) then that reference may be changed and the change will appear
outside the function.
Consider:
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package test;
/**
*
* @author Administrator
*/
public class Main {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
String [] sa = {"hi", "Bob"};
int [] sa2 = {1, 2};
testMutableArray(sa, sa2);
System.out.println(sa[0]+ " " + sa[1]);
System.out.println(sa2[0] + " " + sa2[1]);
}
private static void testMutableArray(String[] sa, int [] sa2) {
System.out.println(sa[0]+ " " + sa[1]);
System.out.println(sa2[0] + " " + sa2[1]);
String [] sat = {"hello", "William"};
sa = sat;
System.out.println(sa[0]+ " " + sa[1]);
sa2[0] = 3;
sa2[1] = 4;
System.out.println(sa2[0] + " " + sa2[1]);
}
}
Output:
hi Bob
1 2
hello William
3 4
hi Bob
3 4
Date: Thu, 22 Jan 2009 20:42:21 +0100
Subject: [java programming] Is it possible to Pass-By-Value an array?
From: [email protected]
To: [email protected]
Hi!I'm wondering if it's possible to pass-by-value an array to a method?
Thanks.Jose
--
/**************************************************/
Jose Maria Dueñas Quesada
e-mail: [email protected]
web: www.joseduenas.com
/**************************************************/
Computer science is not about computers any more than astronomy is about
telescopes. -- E.Dijkstra
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