myStringList.java

import java.io.*;
import java.util.*;

public class myStringList {
    private String [] data = new String [5];
    private int numItems = 0;

    public boolean isFull() {
        return numItems >= data.length;
    }

    public void grow() {
         // "grow" the array by creating a new one and copying over
         String [] tmpArray = new String[data.length+data.length/2];
         for (int i=0;i<data.length;i++)
                tmpArray[i]=data[i];
         data = tmpArray;
    }

    public void add(String d) {
        if (isFull()){
         grow();
        }
        data[numItems]=d;
        numItems = numItems + 1;
    }
    
    public String toString() {
        String s = Arrays.toString(data)+" : "+numItems;
        return s;
    }
        
    public void add(int pos, String d) {
                // to be completed by you
                // inserts the value d at location (index) pos)
                // recall the algorithm we developed in calss:
                // 1. Grow if needed
                // 2. shift everything past the insertion point down
                // 3. add the new item
                // 4. numitems++
                
                if (isFull()){
                        grow();
                }
                for (int i=numItems; i>pos; i--){
                        data[i]=data[i-1];
                }
                data[pos]=d;
                numItems=numItems+1;
        }

    public void remove(int pos) {
                // removes the item at location pos
                // 1. shift everything down to remove the item
                // 2. numitems--;
                for (int i=pos; i<data.length-1; i++){
                        data[i]=data[i+1];
                }
                numItems=numItems-1;                
        }
        
        public int size() {
                // return the number of items in the list
                return numItems;
        }
        
        public String get(int pos) {
                //return the item at pos;
                return data[pos];
        }
        
        public void set(int pos, String d) {
                // change the item at pos to have the value d
                data[pos]=d;
        }

    public String find(String d){
	if (indexOf(d)==-1)
	    return "";	
	return d;
    }


    public int indexOf (String d) {
	for (int i = 0; i <numItems; i ++) {
	    if (data[i].equals(d)) {
		return i;
	    }
	}
	return -1;
    }

    public void fremove(String d){
	if (indexOf(d)>-1){
	    remove(indexOf(d));
	}
    }
}