Converting object to Integer equals null

Question

I am trying to convert an object from an object to an integer in java. These are the results I get with the following methods:

Object intObject = 50;
intObject: 50
intObject.toString(): 50
Integer.getInteger(intObject.toString()): null

I have no idea why I would get a null when converting the string of the object to an integer.

Here is the code that I am using:

    final Object temp = mCloudEntity.get(SaveAndLoadManager.TAG_TEST_INT);
    Log.i(TAG, "intObject: " + temp );  
    Log.i(TAG, "intObject.toString(): " + temp.toString()); 
    Log.i(TAG, "Integer.getInteger(intObject.toString()): " + Integer.getInteger(temp.toString()));

Please show some real Java code including your System.out.println's. Sort-of code just confuses us. — Hovercraft Full Of Eels, Jul 10 '13 at 01:24
Please show the actual code you are running separate from the output that it produces. — Code-Apprentice, Jul 10 '13 at 01:25
Why you do not cast your object directly into int? Integer a = (Integer) intObject; — Fabian N., Jul 10 '13 at 01:28

score 2 · Accepted Answer · answered Jul 10 '13 at 01:25

2

You should use

// Parses the string argument as a signed decimal integer
Integer.parseInt(intObject.toString());

instead of

// Determines the integer value of the system property with the specified name.
// (Hint: Not what you want)
Integer.getInteger(...)

answered Jul 10 '13 at 01:25

David Hofmann

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3

It would help posting *why* to use this method instead. – Luiggi Mendoza Jul 10 '13 at 01:26
Thanks @LuiggiMendoza, I updated with some snippets of the javadoc – David Hofmann Jul 10 '13 at 01:28
2

Check the possible duplicated link to note a proper explanation on the subject. Refer to [What is an acceptable answer?](http://meta.stackexchange.com/a/118694/182862) points 5, 8, 9, 10 and 11. – Luiggi Mendoza Jul 10 '13 at 01:28

Converting object to Integer equals null

1 Answers1