Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

public class Main {
    /**
     * find the nth index of a char c in a string.  returns -1 if there aren't that many chars in the string
     * @param c
     * @param n
     * @return
     */
    public static int getNthIndexOf(char c, String str, int n) {

        if (n < 1) {
            throw new IllegalArgumentException("n must be >= 1: " + n);
        }

        int index = str.indexOf(c);
        int count = 0;
        while (index != -1 && (++count) < n) {
            index = str.indexOf(c, index + 1);
        }

        return index;
    }
}