Although str4 has the identical content material in uppercase equals() returns false as it is case-sensitive. On the opposite hand, when we evaluate the 2nd string with third string, it returns false. If you have any kind of questions relating to where and ways to use Dependently typed queue in haskell, you could call us at the page. This is as a result of each these strings are pointing to completely different objects . An instance of this is when we log certain circumstances and the context we embrace in the logged message features a variable or subject that's null. It is very unlikely in such a case that we want a NullPointerException to be possibly thrown during the tried logging of some probably completely different condition. Fortunately, Java's string conversion is commonly available in these situations. A string is an object that represents a sequence of characters. Java offers many alternative strategies for string manipulation. In this text, we now have used a few of these methods similar to isEmpty(), equals(), StringUtils.isEmpty() and length() to verify if the String is null, empty or clean. First you can move the inner comparator itself to Comparator.nullsFirst(), which would make that comparator handle null routinely .