Get value from the array based on the HashCode

Question

public static void runJoin(int[][] t1,int[][] t2)
     PrintWriter out=null;
     int rows = 1000;
     int cols = 7;
     int [][] myTable3 = new int[rows][cols];
     int x = 0;
     System.out.print("Running HashJoin:Method loads the "+
     "smaller table in the memory and applies a hashing function "+
     "to common column and stores it in another table. "+
     "The larger table is then read from the file. "+
     "The same hashing function is applied to Col n of the table and a       matching record in the first table is looked up. A match will create a row in Table 3. ");          
//Apply hashing function to smaller table and store it in the memory.
          Integer[] It2 = new Integer[t2.length];
          int [] hashCodest2 = new int[t2.length];
          Hashtable ht = new Hashtable();
          for(int i =0; i <t2.length;i++){
               It2[i] = new Integer(t2[0]);
               hashCodest2[i] = It2[i].hashCode();
               ht.put(new Integer(hashCodest2[i]),It2[i]);
          //Larger table get hashcodes
          Integer It1[] = new Integer[t2.length];
          int [] hashCodest1 = new int[t2.length];          
          for(int j =0; j <t1.length;j++){
               It1[j] = new Integer(t1[j][4]);
               hashCodest1[j] = It1[j].hashCode();               }
          //Based on the hashcode get the value from the Table2;
          try{
out = new PrintWriter( new FileOutputStream( "c:\\HashJoinTable.txt" ) );
          Enumeration e = ht.keys();
               while(e.hasMoreElements())
//How do I get the value from the array based on the HashCode? Do I need to do a loop here???                         
hashCodes1.get(e.nextElement());           
          }catch(Exception e){}

Answer 1

ok I got it......
          //Apply hashing function to smaller table and store it in the memory.
          Integer[] It2 = new Integer[t2.length];
          int [] hashCodest2 = new int[t2.length];
          Hashtable ht = new Hashtable();
          for(int i =0; i <t2.length;i++){
               It2[i] = new Integer(t2[0]);
               hashCodest2[i] = It2[i].hashCode();
               ht.put(new Integer(hashCodest2[i]),It2[i]);
          //Larger table get hashcodes and compare
          Integer It1[] = new Integer[t2.length];
          int [] hashCodest1 = new int[t2.length];          
          Hashtable ht2 = new Hashtable();
          for(int j =0; j <t1.length;j++){
               It1[j] = new Integer(t1[j][4]);
               hashCodest1[j] = It1[j].hashCode();               
               ht2.put(new Integer(hashCodest1[j]),It1[j]);
          //Based on the hashcode get the value from the Table2;
          try{
out = new PrintWriter( new FileOutputStream( "c:\\HashJoinTable.txt" ) );
          Enumeration e = ht.keys();
          Integer t3[] = new Integer[t2.length];
               while(e.hasMoreElements())
                    t3[x] = (Integer) ht2.get(e.nextElement());                
                    x++;
          }catch(Exception e){}