Converting object to Integer equals null [duplicate]

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
– Hovercraft Full Of Eels, Commented Jul 10, 2013 at 1:24
Please show the actual code you are running separate from the output that it produces. — Code-Apprentice
– Code-Apprentice, Commented Jul 10, 2013 at 1:25
Why you do not cast your object directly into int? Integer a = (Integer) intObject; — Fabian N.
– Fabian N., Commented Jul 10, 2013 at 1:28

David Hofmann · Accepted Answer · 2013-07-10 01:25:44Z

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, 2013 at 1:25

David Hofmann

5,57512 gold badges54 silver badges83 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Luiggi Mendoza Over a year ago

It would help posting why to use this method instead.

David Hofmann Over a year ago

Thanks @LuiggiMendoza, I updated with some snippets of the javadoc

Luiggi Mendoza Over a year ago

Check the possible duplicated link to note a proper explanation on the subject. Refer to What is an acceptable answer? points 5, 8, 9, 10 and 11.

Collectives™ on Stack Overflow

Converting object to Integer equals null [duplicate]

1 Answer 1

3 Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Linked

Related