Value isn't being saved in the strings

Question

I'm trying to make a class where I put a key and value into the put method which puts the key in the k string array and value into the v string array, however it is not being saved in the array when I do get or display.
For example: put(dan,30) get(dan) returns null
display returns null null 10 times. Does anyone know what's wrong?

public class Memory 
       {
       final int INITIAL_CAPACITY = 10;
       String[] k = new String[INITIAL_CAPACITY];
       String[] v = new String[INITIAL_CAPACITY];
       int count = 0;

       public Memory()
       {
          count = 0;
       }
       public int size()
       {
          return count;
       }
       public void put(String key, String value)
       {
            int a = 0;
            boolean found = false;
            for (int i = 0; i < k.length; i++)
            {
                //System.out.println("key is " + key.equals(k[i]));
                if (key.equalsIgnoreCase(k[i]))
                {
                    v[i] = value;
                    found = true;
                }
                if (found)
                    break;
                a++;
            }
            //System.out.println(a == k.length);
            if (a == k.length);
            {
              k[count] = key;
              v[count] = value;
            //System.out.println(k[count] + " " + v[count]);
              count++;          
            //System.out.println(count);
            }

       }
       public String get(String key)
       {
          String output = "a";
          for(int i = 0; i < k.length; i++)
          {
             if(!key.equalsIgnoreCase(k[i]))
             {
                output = null;
             }
             else
             {   
                output = v[i]; 
                return output;
             }  
          }
          return output;
       }
       public void clear()
       {
            for (int i = 0; i < k.length; i++)
            {
                k[i] = null;
                v[i] = null;
            }
          count = 0;
       }

        public void display()
        {
            for (int i = 0; i < k.length; i++)
            {
                System.out.println(k[i] + " " + v[i]);
            }
        }
    }

Answer 1

if (a == k.length);

remove the semicolon or else it always runs the block below

And I hope this is just as a study, because you should just use Map and not implement one yourself. Also your algorithm is very poor. It is O(n) performance for both put and get. You can actually do better like O(log n)

Answer 2

Your code worked for me.

Just ran:

public static void main(String args[]){
        Memory newMem = new Memory();
        newMem.put("Dan", "30");
        System.out.println(newMem.get("Dan"));
    }

And the output was "30"

What does your code look like for creating/putting/getting?

Answer 3

while(true)
{
    Scanner kb = new Scanner(System.in);
    Memory m = new Memory();
...

Every time you loop, you are creating a new Memory object instead of updating a reference to an existing one.