Question

Write a method named lastIndexOf that accepts an array of integers and an * integer value as its parameters and returns the last index at which the * value occurs in the array. The method should return -1 if the value is not * found.

Answer 1

Answer:

The method is as follows:

public static int lastIndexOf(int [] numbers, int num){

    int lastIndex = numbers[0];

    for(int i =0; i<numbers.length;i+=num){

        lastIndex = numbers[i];

    }

    return lastIndex;

}

Explanation:

This defines the method

public static int lastIndexOf(int [] numbers, int num){

This initializes the lastIndex to the first element of the array

    int lastIndex = numbers[0];

This iterates through every "num" element of the array

    for(int i =0; i<numbers.length;i+=num){

This gets the current index... until the last

        lastIndex = numbers[i];     }

This returns the last

    return lastIndex; }