Linked Questions
1,956 questions linked to/from Is Java "pass-by-reference" or "pass-by-value"?
250
votes
7
answers
305k
views
Are arrays passed by value or passed by reference in Java? [duplicate]
Arrays are not a primitive type in Java, but they are not objects either, so are they passed by value or by reference? Does it depend on what the array contains, for example references or a primitive ...
- 3,045
55
votes
6
answers
29k
views
Java is NEVER pass-by-reference, right?...right? [duplicate]
Possible Duplicate:
Is Java “pass-by-reference”?
I found an unusual Java method today:
private void addShortenedName(ArrayList<String> voiceSetList, String vsName)
{
if (null == vsName)...
- 1,234
46
votes
6
answers
37k
views
Is Java really passing objects by value? [duplicate]
Possible Duplicate:
Is Java pass by reference?
public class myClass{
public static void main(String[] args){
myObject obj = new myObject("myName");
changeName(obj);
...
- 479
37
votes
10
answers
36k
views
Java: Why does this swap method not work? [duplicate]
I have the following code:
public class Main {
static void swap (Integer x, Integer y) {
Integer t = x;
x = y;
y = t;
}
public static void main(String[] args) {
...
- 770
33
votes
8
answers
38k
views
java array pass by reference does not work? [duplicate]
I thought almost all languages, including java, pass array into function as reference (modifiable).
But somehow it does not work here, and the testArray is still 1,2,3 with size of 3.
Strange enough,...
anon242463
40
votes
4
answers
94k
views
Does a List object get passed by reference? [duplicate]
Possible Duplicate:
Is Java pass-by-reference?
Does a List object get passed by reference? In other words, if I pass an ArrayList (java.util.ArrayList) object to a class, will it be automatically ...
- 10.3k
24
votes
11
answers
70k
views
Confused, whether java uses call by value or call by reference when an object reference is passed? [duplicate]
public class program1{
public static void main(String args[]){
java.util.Vector vc=new java.util.Vector();
vc.add("111");
vc.add("222");
functioncall(vc);
...
- 786
13
votes
9
answers
8k
views
Pass-by-value (StringBuilder vs String) [duplicate]
I do not understand why System.out.println(name) outputs Sam without being affected by the method's concat function, while System.out.println(names) outputs Sam4 as a result of the method's append ...
- 4,379
12
votes
7
answers
15k
views
Java Incremental operator query (++i and i++) [duplicate]
I have the following code:
public class Book {
private static int sample1(int i) {
return i++;
}
private static int sample2(int j) {
return ++j;
}
public static ...
- 3,809
27
votes
5
answers
8k
views
Why is an ArrayList parameter modified, but not a String parameter? [duplicate]
public class StackOverFlow {
public static void main(String[] args) {
ArrayList<String> al = new ArrayList<String>();
al.add("A");
al.add("B");
...
- 313
18
votes
6
answers
23k
views
Why do arrays change in method calls? [duplicate]
When I write like this:
public class test {
void mainx()
{
int fyeah[] = {2, 3, 4};
smth(fyeah);
System.out.println("x"+fyeah[0]);
}
void smth(int[] fyeah)
...
- 21.8k
13
votes
8
answers
38k
views
swapping of objects in java [duplicate]
I have studied that java is pass by reference but when I execute following code the strings are not swapped in main method why?
static void swap(String s1, String s2){
String temp = s1;
s1=s2;...
- 2,107
14
votes
5
answers
53k
views
Java - Object state does not change after method call [duplicate]
Beginner java question, but I cannot understand how call-by-Value ( or Reference ) is working in the example below -
How come the String value is not modified after it exits the method while my ...
- 3,693
14
votes
4
answers
82k
views
Changing the values of variables in methods, Java [duplicate]
I have a question about changing the values of variables in methods in Java.
This is my code:
public class Test {
public static void funk(int a, int[] b) {
b[0] = b[0] * 2;
a = ...
- 49.7k
13
votes
4
answers
48k
views
Java Pass By Value and Pass By Reference [duplicate]
i have done the following sample with to check my knowledge
import java.util.Map;
public class HashMap {
public static Map<String, String> useDifferentMap(Map<String, String> ...
- 4,542