Does Java pass object by value or by reference? Answer is a bit complex- it passes reference of object by value. Confused? Here is an example which will explain
public class test {
int a;
public static void alter(test obj)
{
//setting value of variable a.
obj.a=10;
//creating a temp object and assigning to main object
test temp=new test();
temp.a=15;
obj=temp;
}
public static void main(String s[])
{
try
{
test obj=new test();
obj.a=5;
//shows 5
System.out.println("Before call obj.a:"+obj.a);
alter(obj);
//shows 10 not 15
System.out.println("After call obj.a:"+obj.a);
}
catch(Exception e)
{
e.printStackTrace();
}
}
}