ClassDataArray

/**
 * Write a description of class ClassDataArray here.
 *
 * @author (your name)
 * @version (a version number or a date)
 */
class ClassDataArray
 {
 private Person[] a; // reference to array
 private int nElems; // number of data items
 public ClassDataArray(int max) // constructor
 {
 a = new Person[max]; // create the array
 nElems = 0; // no items yet
 }
 public Person find(String searchName)
 { // find specified value
 int j;
 for(j=0; j<nElems; j++) // for each element,
 if( a[j].getLast().equals(searchName) ) // found item?
 break; // exit loop before end
 if(j == nElems) // gone to end?
 return null; // yes, can't find it
 else
 return a[j]; // no, found it
 } // end find()
 public void insert(String last, String first, int age)
 {
 a[nElems] = new Person(last, first, age);
 nElems++; // increment size
 }
 public boolean delete(String searchName)
 { // delete person from array
 int j;
 for(j=0; j<nElems; j++) // look for it
 if( a[j].getLast().equals(searchName) )
 break;
 if(j==nElems) // can't find it
 return false;
 else // found it
 {
 for(int k=j; k<nElems; k++) // shift down
 a[k] = a[k+1];
 nElems--; // decrement size
 return true;
 }
 } // end delete()
 public void displayA() // displays array contents
 {
 for(int j=0; j<nElems; j++) // for each element,
 a[j].displayPerson(); // display it
 }
 } // end class ClassDataArray