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addOneIntToArray.java

public static int[] addOneIntToArray(int[] initialArray , int newValue) {

    int[] newArray = new int[initialArray.length + 1];
    for (int index = 0; index < initialArray.length; index++) {
        newArray[index] = initialArray[index];
    }

    newArray[newArray.length - 1] = newValue;
    return newArray;
}