In Java, how do I check if a string contains a substring (ignoring case)? [duplicate]

by 
str1.toUpperCase().contains(str2.toUpperCase())

UPD:

Original answer was using toLowerCase() method. But as some people correctly noticed, there are some exceptions in Unicode and it’s better to use toUpperCase(). Because:

There are languages knowing more than one lower case variant for one upper case variant.

More Related Contents:

  1. Need the words between the ” – ” ONLY string splitting [duplicate]
  2. Can you explain the output of the following source code?
  3. How to find nth occurrence of character in a string?
  4. How to replace case-insensitive literal substrings in Java
  5. Java: Getting a substring from a string starting after a particular character
  6. Java – removing first character of a string
  7. How does Java store Strings and how does substring work internally? [closed]
  8. substring index range
  9. How to replace a substring of a string [duplicate]
  10. How do I get the last character of a string?
  11. Finding second occurrence of a substring in a string in Java
  12. Java; Initializing A Count of Input, After Period Is Entered
  13. Splitting a string at every n-th character
  14. Convert float to String and String to float in Java
  15. How to split a string in Java
  16. Why is the String class declared final in Java?
  17. How to check if two words are anagrams
  18. Java String to SHA1
  19. How to determine if a String has non-alphanumeric characters?
  20. Why does String.replace not work? [duplicate]
  21. Use of the String(String) constructor in Java [duplicate]
  22. How to add text to an image in java?
  23. Is Java’s assertEquals method reliable?
  24. How to convert String object to Boolean Object?
  25. Sort a single String in Java
  26. Java string intern and literal
  27. Java split String performances
  28. Compare two hex strings in Java?
  29. What is a Java String’s default initial value?
  30. Behavior of String literals is confusing

Leave a Comment