package esimene;

public class Pinu<T> {
   @SuppressWarnings("unchecked")
   T[] sisu=(T[])new Object[100];
   private int kogus=0;
   public int size(){return kogus;}
   public void push(T uus){
	   sisu[kogus++]=uus;	   
   }
   public T peek(){
	   if(kogus<=0){throw new IllegalStateException();}
	   return sisu[kogus-1];	   
   }
   public T pop(){
	   if(kogus<=0){throw new IllegalStateException();}
	   return sisu[--kogus];
   }
}