Extension.java

package com.booleanuk.extension;

import com.booleanuk.helpers.ExtensionBase;

public class Extension extends ExtensionBase {
    /*
        Implement the following methods:

        1. add, which accepts two floats and returns a float (both floats added together)

        2. add, which accepts two doubles and returns a double (both doubles added together)

        3. subtract, which accepts two floats and returns a float (first float minus second float)

        4. subtract, which accepts a String and a char and returns a string with all instances of the provided char removed

        5. multiply, which accepts two ints and returns an int (first int multiplied by second int)

        6. multiply, which accepts a string and an int, and returns a string containing the provided string
        as many times as the provided int separated by a comma. E.g.
        multiply("Hello", 3) -> "Hello,Hello,Hello"

        7. multiply, which accepts an array of Strings that each contain a number, and an int
        The method should return an array of ints that contain the value of multiplying each String number by the provided int
        E.g.
        multiply(["2", "7", "3"], 3) -> [6, 21, 9]
     */
    public float add(float flOne, float flTwo){
        return flOne + flTwo;
    }

    public double add(double dblOne, double dblTwo){
        return dblOne + dblTwo;
    }

    public float subtract(float flOne, float flTwo){
        return flOne - flTwo;
    }

    public String subtract(String str, char ch){
        return str.replace(Character.toString(ch), "");
    }

    public int multiply(int numOne, int numTwo){
        return numOne * numTwo;
    }

    public String multiply(String str, int num){
        String sequence = str;
        for (int i = 1; i<num; i++){
            sequence = sequence + "," + str;
        }
        return sequence;
    }

    public int[] multiply(String[] strarr, int num){
        int[] result = new int[strarr.length];
        int temp;
        for(int i = 0; i<strarr.length; i++){
            temp = Integer.parseInt(strarr[i]);
            temp=temp*num;
            result[i]=temp;
        }
        return result;
    }
}