findNeedles.md

Method: findNeedles

The findNeedles method can compare the values of the haystack string and the needles string array. The findNeedles method returns the number of times a value appears in the haystack string.

Request Body

The following is an example of the structure of the request body:

public class FarmBarn{ 
    public static void main(String[] args){ 
        String[] needles={"almost", "knew", "ground", "sky"};
        String haystack=("almost before we knew it, we had left the ground");
        findNeedles(haystack, needles);
    }
    public static void findNeedles(String haystack, String[]  needles){  
        if (needles.length>5){ 
            System.err.println("Too many words!");
        }else{ 
            int[] countArray=new int[needles.length];
            for (int i=0; i<needles.length; i++) {
                String[] words=haystack.split("[ \"\'\t\n\b\f\r]", 0);
                for (int j=0; j<words.length; j++) {
                    if (words[j].compareTo(needles[i])==0) {
                        countArray[i]++; 
                    }
                }
            }
            for (int j=0; j < needles.length; j++){  
                System.out.println(needles[j]+": "+countArray[j]);
            }
        }
    }
}

Fields

Field	Description
public class	The name of the public class.
public static void	Stores Java command-line arguments in an array.
String[] needles	The values that are stored in a string array to be compared.
String haystack	The value that is stored in a string to be compared.
public static void	The name of the method and its parameters.
int[] countArray	Stores the length of the needle string array.
String[] words	Breaks the haystack string based on the delimiters and limit.
System.err.println	The error that prints if the method fails.
System.out.println	The message the method prints.

Response Body

After calling the method, each term from the needles string array will show with the number of times the term appears in the haystack string. If the needles string array’s length is greater than 5, the method prints an error and exits.