Returns true if array a from position start contains all elements of array b in sequential order. - Java Collection Framework

Java examples for Collection Framework:Array Contain

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Description

Returns true if array a from position start contains all elements of array b in sequential order.

Demo Code

/* Copyright (c) 2001-2010, The HSQL Development Group
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        byte[] arra = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };
        int start = 2;
        byte[] arrb = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };
        System.out.println(containsAt(arra, start, arrb));
    }

    /**
     * Returns true if arra from position start contains all elements of arrb
     * in sequential order.
     */
    public static boolean containsAt(byte[] arra, int start, byte[] arrb) {
        return countSameElements(arra, start, arrb) == arrb.length;
    }

    /**
     * Returns true if arra from position start contains all elements of arrb
     * in sequential order.
     */
    public static boolean containsAt(char[] arra, int start, char[] arrb) {
        return countSameElements(arra, start, arrb) == arrb.length;
    }

    /**
     * Returns the count of elements in arra from position start that are
     * sequentially equal to the elements of arrb.
     */
    public static int countSameElements(byte[] arra, int start, byte[] arrb) {

        int k = 0;
        int limit = arra.length - start;

        if (limit > arrb.length) {
            limit = arrb.length;
        }

        for (int i = 0; i < limit; i++) {
            if (arra[i + start] == arrb[i]) {
                k++;
            } else {
                break;
            }
        }

        return k;
    }

    /**
     * Returns the count of elements in arra from position start that are
     * sequentially equal to the elements of arrb.
     */
    public static int countSameElements(char[] arra, int start, char[] arrb) {

        int k = 0;
        int limit = arra.length - start;

        if (limit > arrb.length) {
            limit = arrb.length;
        }

        for (int i = 0; i < limit; i++) {
            if (arra[i + start] == arrb[i]) {
                k++;
            } else {
                break;
            }
        }

        return k;
    }
}

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