※自分用学習メモです 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、その数値 ...

Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1.

Java developers use the Character, String, StringBuffer, and StringTokenizer classes to represent and manipulate text in programs. Learn how to create objects from these classes and examine their ...

JEP 430「文字列テンプレート（プレビュー）」は、Javaプログラミング言語の強化を提案する機能JEPタイプで、文字列リテラルに似ているが、実行 ...

package chapter_18; import java.util.Scanner; /** * (Occurrences of a specified character in a string) Rewrite Programming Exercise * 18.10 using a helper method to pass the substring high index to ...

Java gives you the ability to dynamically create strings. Even after you set the string value, you can add more characters to the string value throughout the code. This process lets you build a ...

The SourceVersion class provides information on Java source versions and can provide some interesting details, including demonstration of terminology covered in the Java Language Specification .