Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

public class Main {

    public static int indexOf(byte[] datas, int start, byte[] t) {

        if (datas == null || t == null) {
            throw new NullPointerException("source or target array is null!");
        }

        int index = -1;
        int len = datas.length;
        int tlen = t.length;

        if (start >= len || len - start < tlen) {
            return -1;
        }

        while (start <= len - tlen) {
            int i = 0;
            for (; i < tlen; i++) {
                if (datas[start + i] != t[i]) {
                    break;
                }
            }

            if (i == tlen) {
                index = start;
                break;
            }

            start++;
        }

        return index;
    }
}