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Thread: pointers

  1. #1
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    Default pointers

    Does Java support pointers? why or why not? if not, is there an equivalent concept in java that almost does the same?


  2. #2
    Super Moderator helloworld922's Avatar
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    Default Re: pointers

    Not in the same sense as C/C++. All object variables are pointer-like, but when you pass an object variable to a method, the reference is passed by value.

    public class Test
    {
        int val;
        public static void doIt1(Test t)
        {
            t.val = 5;
            System.out.println("doIt1 t.val: " + t.val); // will print out 5
        }
     
        public static void doIt2(Test t)
        {
            t = new Test();
            t.val = 10;
            System.out.println("doIt2 t.val: " + t.val); // will print out 10
     
        public static void main(String[] args)
        {
            Test my_t = new Test();
            doIt1(my_t);
            System.out.println("my_t.val: " + my_t.val); // will print out 5
            doIt2(my_t);
            System.out.println("my_t.val: " + my_t.val); // will print out 5
        }
    }

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