Long.getLong() failing, returning null to valid string

Question

I\'ve spent the past two hours debugging what seems extremely unlikely. I\'ve stripped the method of a secondary Android Activity to exactly this:

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Answer 1

To understand this, some examples:

Long val= Long.getLong("32340");

returns: null

Long val = Long.getLong("32340", 3000);

returns: 3000

Using Long.parseLong() :

Long val  = Long.parseLong("32340");

returns: 32340

The documentation describe getLong() method as :

Returns the Long value of the system property identified by string.

this is the code of the getLong() method and only get a property value defined by a string:

  public static Long getLong(String string) {
        if (string == null || string.length() == 0) {
            return null;
        }
        String prop = System.getProperty(string);
        if (prop == null) {
            return null;
        }
        try {
            return decode(prop);
        } catch (NumberFormatException ex) {
            return null;
        }
    }

If you want to parse a String to Long, the best way is using Long.parseLong() method.