Java comparison with == of two strings is false? [duplicate]
The == operator compares the object references, not the value of the Strings.
To compare the values of Strings, use the String.equals method:
"231".equals(parts[0]);
This is true with any other object in Java -- when comparing values, always use the equals method rather than using the == operator.
The equals method is part of Object, and should be overridden by classes which will be compared in one way or another.
If the strings are not interned, then == checks reference identity. Use:
"231".equals(parts[0]);
instead.