Question

what is a good hash function for ID numbers of format "LM-0001312", "LM-04341313", "LM-4205114"

Answer 1

To solve this problem i have implemented a java program named CodeGenerate.java

This program will take the number of ID_NUMBER format required as input and print all the corresponding ID_NUMBER in output.

CodeGenerate.java

import java.util.Random;
import java.util.Scanner;

public class CodeGenerate {
   private String[] hashCodes;
  
   // Creating HashCodes
   public void hashFunctionOfIdNumber(int noOfCode){
       hashCodes = new String[noOfCode];
       for(int i=0; i<noOfCode; i++){
           // Generating a Random number within range 1000000 to 9999999
           Random rnd = new Random();
           int n = 1000000 + rnd.nextInt(9999999);
           StringBuilder b = new StringBuilder();   // Initialize a StringBuilder
           b.append("LM-");
           b.append(n);
           hashCodes[i] = b.toString();
       }
   }
   //Display all the HashCodes
   public void printHashCodes(){
       for(int i=0; i<hashCodes.length; i++){
           System.out.println(hashCodes[i]);
       }
   }
   public static void main(String[] args) {
       CodeGenerate obj = new CodeGenerate();
       Scanner in = new Scanner(System.in);
       int noOfCode = in.nextInt();
       obj.hashFunctionOfIdNumber(noOfCode);
       obj.printHashCodes();
   }

}

Output

5 (Input)
LM-7729511
LM-1065575
LM-8765427
LM-3010207
LM-4670459

In case any further information required please let me know.