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Problems with the Primitive Data Type Integer

 

Problems with the Primitive Data Type Integer
labyrinth_fufu

3 Jul, 2009 - 02:25 AM
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How would you set a primitive data type (integer) into null?
In the following code for example.. data[top] = null, creates an error. blink.gif

CODE


    protected int data[];

    @Override
    public int pop() throws EmptyStackException {
        data[top] = null;                         //this line creates an error
        new MyStackClass(top - 1);
        capacity = top + 1;
        return data[top];
    }



In this case, what should I do then? Help? please....

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bbq

RE: Problems With The Primitive Data Type Integer

3 Jul, 2009 - 02:51 AM
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omgwtfbbq
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Ahh perhaps data = null

eg...
java

protected int[] data;

// .. code
data = null;


instead of something like
java

protected int[] data;

// .. code

data = new int[10];


smile.gif

This post has been edited by bbq: 3 Jul, 2009 - 02:52 AM
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mostyfriedman

RE: Problems With The Primitive Data Type Integer

3 Jul, 2009 - 03:08 AM
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you cant set a primitive data type to null, only reference data types..anyway you could do something like this..check if top is equal to 0..if it is then throw an exception or print a message that the stack is empy else pop the value
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pbl

RE: Problems With The Primitive Data Type Integer

3 Jul, 2009 - 03:27 AM
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QUOTE(labyrinth_fufu @ 3 Jul, 2009 - 02:25 AM) *

How would you set a primitive data type (integer) into null?

You just can't
Object reference are reference which means pointer

Object obj = null;

means obj points to nothing.

Object obj = abc;

means obj points to the Object abc does not mean obj contains abc.

Primitive datatype are not reference they contain what they mean

int x = 0;

means x contains 0
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