Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

public class Main {
    /**
     *  Basic find for small arrays of Object.
     */
    public static int find(Object[] array, Object object) {

        for (int i = 0; i < array.length; i++) {
            if (array[i] == object) {

                // hadles both nulls
                return i;
            }

            if (object != null && object.equals(array[i])) {
                return i;
            }
        }

        return -1;
    }

    /**
     *  Basic find for small arrays of int.
     */
    public static int find(int[] array, int value) {

        for (int i = 0; i < array.length; i++) {
            if (array[i] == value) {
                return i;
            }
        }

        return -1;
    }

    public static int find(short[] array, int value) {

        for (int i = 0; i < array.length; i++) {
            if (array[i] == value) {
                return i;
            }
        }

        return -1;
    }

    public static int find(short[] array, int value, int offset, int count) {

        for (int i = offset; i < offset + count; i++) {
            if (array[i] == value) {
                return i;
            }
        }

        return -1;
    }

    /**
     * Returns the index of the first occurence of arrb in arra. Or -1 if not found.
     */
    public static int find(byte[] arra, int start, int limit, byte[] arrb) {

        int k = start;

        limit = limit - arrb.length + 1;

        int value = arrb[0];

        for (; k < limit; k++) {
            if (arra[k] == value) {
                if (arrb.length == 1) {
                    return k;
                }

                if (containsAt(arra, k, arrb)) {
                    return k;
                }
            }
        }

        return -1;
    }

    /**
     * Returns the index of b or c in arra. Or -1 if not found.
     */
    public static int find(byte[] arra, int start, int limit, int b, int c) {

        int k = 0;

        for (; k < limit; k++) {
            if (arra[k] == b || arra[k] == c) {
                return k;
            }
        }

        return -1;
    }

    /**
     * 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;
    }
}