index and substring

indexOf_and_substring.java

public class StrUtil {
    public static void main(String[] args) {
        // 文字列編集
        String str = "aaa/aaaaaaa___________a";

        // lastIndexOf -> 一致する複数の文字列の最後のやつを返す
        // endStr.length()

        String endStr = "/";
        int endIndex = str.lastIndexOf(endStr) + endStr.length();
        int x = endStr.length();
        System.out.println(x);

        // Substring
        // 参考 -> https://www.javadrive.jp/start/string/index7.html
        // 文字列切り出し
        String result = str.substring(endIndex);
        String work = result.replace("_", "");

        //String work = str.substring(0, str.indexOf("_"));
        //String work = str.substring(0,3);
        System.out.println(endIndex);
        System.out.println(work);
    }
}

change public