/* COP 3330 Example
 * 
 * This class demonstrates how to throw/create (initiate) an Exception
 *
 */

import java.util.*;
 
 public class ThrowExample {
 	//throw example stores a bunch of names and ages
 	
 	private static final int MaxAge = 130;
 	
 	
 	private ArrayList<String> names;
 	private ArrayList<Integer> ages; //note we use the Integer object type, rather than primitive
 	
 	public ThrowExample(){
 		this.names = new ArrayList<String>();
 		this.ages = new ArrayList<Integer>();
 	}
 	
 	public void addNameAndAge(String name, int age) throws TooOldException{
 		//add the name:
 		this.names.add(name);
 		
 		//add the age if it's not too big:
 		if (age > MaxAge){
 			//creates a new TooOldException objects and intiates it (starts the throwing process)
 			throw new TooOldException(age + " is too old, it must be incorrect.");
 		}
 		this.ages.add(new Integer(age));//note we create an Integer object to hold the age
 	}
 	
 	public static void main (String [] args) throws TooOldException{
 		//main must throw or catch TooOldException because addNameAndAge throws it
 		//in this case the exception makes it all the way to the Java Interpritter -> program halts
 		//and the trace stack is printed
 		
 		ThrowExample te = new ThrowExample();
 		
 		te.addNameAndAge("Mary", 20);//should be fine
 		
 		te.addNameAndAge("Vampire", 140);//should cause the exception to be thrown.
 	}
 }

class TooOldException extends Exception{
	//an exception to be thrown when something is too old.
	
	
	public TooOldException(String str){
		super(str);
	}
	
}