Though Java already has a character type and char keyword to represent and manipulate characters, the language also requires a Character class for two reasons: Character c1 = new Character ('A'); ...

A few years ago I wrote a Soduko solver in Java. Works great, except I have to edit the source file to change the input because I could never get Swing to work like my mental model said it should. Cut ...

if you don't like how the formatter laid out your code, you may need to introduce new functions/variables the formatter is not as clever as humans are, so it can sometimes produce less readable code ...