char を整数に変換したい場合には、Character.getNumericValue() または Character.digit() を使用するか、char を int にキャストする必要があります。 1. Character.getNumericValue() このメソッドは、指定された文字に対応する整数値を返します。 文字が数字 ('0'～'9') であれば ...

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 ...