splice

Splice.java

public static int[] splice(int a[], int offset, int b[]) {
    int[] resultArray = new int[a.length + b.length];
    
    for(int i = 0; i < resultArray.length; i++) {
        if (i < offset) { // before the part b should be copied to
            resultArray[i] = a[i];
        } 
        else if (i - offset < b.length) { // in the middle of the part b is copied to
            resultArray[i] = b[i - offset];
        } 
        else { // after the part b was copied to
            resultArray[i] = a[i - b.length];
        }
    }

    return resultArray;
}