String.equals versus == [duplicate]

by

Use the string.equals(Object other) function to compare strings, not the == operator.

The function checks the actual contents of the string, the == operator checks whether the references to the objects are equal. Note that string constants are usually “interned” such that two constants with the same value can actually be compared with ==, but it’s better not to rely on that.

if (usuario.equals(datos[0])) {
    ...
}

NB: the compare is done on ‘usuario’ because that’s guaranteed non-null in your code, although you should still check that you’ve actually got some tokens in the datos array otherwise you’ll get an array-out-of-bounds exception.

More Related Contents:

  1. java , inserting between duplicate chars in String [closed]
  2. Reading String for list of Integers separated by spaces [duplicate]
  3. How do I compare strings in Java?
  4. How to evaluate a math expression given in string form?
  5. Why can’t I use switch statement on a String?
  6. What are all the escape characters?
  7. Subscript and Superscript a String in Android
  8. How can I format a String number to have commas and round?
  9. Removing duplicates from a String in Java
  10. String comparison – Android [duplicate]
  11. Should I use Java’s String.format() if performance is important?
  12. Java int to String – Integer.toString(i) vs new Integer(i).toString()
  13. How to obtain the last path segment of a URI
  14. Java: Split string when an uppercase letter is found
  15. How to get data from each dynamically created EditText in Android?
  16. Whats the best way to recursively reverse a string in Java?
  17. Garbage collection behaviour for String.intern()
  18. XOR operation with two strings in java
  19. Why does String.hashCode() in Java have many conflicts? [closed]
  20. How to Split a mathematical expression on operators as delimiters, while keeping them in the result?
  21. Convert a String of Hex into ASCII in Java
  22. Java: How to convert a string (HH:MM:SS) to a duration?
  23. Use string in switch case in java
  24. Java equivalent to Explode and Implode(PHP) [closed]
  25. Java: Converting String to and from ByteBuffer and associated problems
  26. How to compare two string dates in Java?
  27. How to Convert an int to a String? [duplicate]
  28. string tokenizer in Java
  29. When does the pool change?
  30. Why StringJoiner when we already have StringBuilder?

Leave a Comment