array.java

// array.java
// demonstrates Java arrays
// to run this program: C>java arrayApp
////////////////////////////////////////////////////////////////
class ArrayApp
   {
   public static void main(String[] args)
      {
      long[] arr;                  // reference to array
      arr = new long[100];         // make array
      int nElems = 0;              // number of items
      int j;                       // loop counter
      long searchKey;              // key of item to search for
//--------------------------------------------------------------
      arr[0] = 77;                 // insert 10 items
      arr[1] = 99;
      arr[2] = 44;
      arr[3] = 55;
      arr[4] = 22;
      arr[5] = 88;
      arr[6] = 11;
      arr[7] = 00;
      arr[8] = 66;
      arr[9] = 33;
      nElems = 10;                 // now 10 items in array
//--------------------------------------------------------------
      for(j=0; j<nElems; j++)      // display items
         System.out.print(arr[j] + " ");
      System.out.println("");
//--------------------------------------------------------------
      searchKey = 66;              // find item with key 66
      for(j=0; j<nElems; j++)          // for each element,
         if(arr[j] == searchKey)       // found item?
            break;                     // yes, exit before end
      if(j == nElems)                  // at the end?
         System.out.println("Can't find " + searchKey); // yes
      else
         System.out.println("Found " + searchKey);      // no
//--------------------------------------------------------------
      searchKey = 55;              // delete item with key 55
      for(j=0; j<nElems; j++)           // look for it
      if(arr[j] == searchKey)
         break;
      for(int k=j; k<nElems; k++)       // move higher ones down
         arr[k] = arr[k+1];
      //if(j != nElems) To fix numbers in to be deleted is not on the array
      nElems--;                         // decrement size
//--------------------------------------------------------------
      for(j=0; j<nElems; j++)      // display items
         System.out.print( arr[j] + " ");
      System.out.println("");
      }  // end main()
   }  // end class ArrayApp