//ArrayString class
//Holds any number of strings
//A more versatile version of QuadString
//which demonstrates Object methods: toString, equals, and clone
//9/13/2006


public class ArrayString {
	
	//instance variables:
	String []theList;
	int numStrings;
	
	public ArrayString(String str){
		//constructor when only one string is passed in
		this.theList = new String[1];
		this.theList[0] = str;
		this.numStrings = 1;
	}
	
	public ArrayString(String [] array){
		//constructor which takes an array of strings
		this.theList = array;
		this.numStrings = array.length;
	}
	
	public ArrayString(){
		//constructor which takes in nothing
		this.numStrings = 0;
		this.theList = null;
	}
	
	
	public String getString(int x){
		//return string x
		String str = "";
		
		/**** to be filled in ****/
		return str;
	}
	
	public String [] getStrings(){
		//return array of strings
		return this.theList;
	}
	
	public boolean setString(int x, String str){
		//sets the string x to str (returns false if it could not set x)
		
		/**** to be filled in ****/
		return true;
	}
	
	public boolean deleteString(int x){
		//removes the string x from the list, shifts everything after it to lower value
		//(returns false if it could not delete x)
		
		/**** to be filled in ****/
		return true;
	}
	
	public int addString(String str){
		//adds a String to the list, and returns the index for the new String
		/**** to be filled in ****/
		return 0;
	}
	
	public String toString() {
		//returns a String representation of the Object
		String returnStr = "";
		
		for (int i = 0; i < theList.length; i++){
			returnStr += i + ":" + theList[i] + "\n";
		}
		
		return returnStr;
	}
	
	public boolean equals(Object other){
		//compares this object of ArrayString to another
		//note we do not need else if since it returns at any point that it discovers they are not equal
		if (!(other instanceof ArrayString))
			return false;
		
		/**** to be filled in ****/
		
		//all strings are equal so they must be the same
		return true;
	}
	
	public Object clone() {
		//create a new object which is the same as "this"
		ArrayString other = null;
		/**** to be filled in ****/
		return other;
	}
	
	public static void main (String [] args) {
		//main class method being used to test class/objects
		String [] aString = {"OOP", "Today is Wed.", "Andy"};
		
		ArrayString as = new ArrayString(aString);
		
		System.out.println(as.toString());
		
		//The code below demonstrates how an iterator for loop deals with objects
		//each loop str points to a String from the testAr
		//when we set str equal to another String (another Object),
		//     we are only changing what str points to for that loop
		//     we are not changing what an elements of testAr is actually pointing to, 
		//     so it remains unchanged
		String [] testAr = as.getStrings();		
		for (String str: testAr){
			str = "nothing";
		}
		System.out.println(testAr[0]);
		//You can not change which object is being pointed to through a iterator for loop
		//However, you can ask the object itself to change values within it.		
		
	}
}