import java.util.*;
public class Bin {

  private int id;          // the id number of the bin
  private Vector contents; // the actual contents, as a Vector
  private int capacity;    // the capacity of the bin
  private int totalWeight; // the total "weight" of the contents

  public Bin(int idNumber, int Capacity){
    id = idNumber;
    contents = new Vector();
    capacity = Capacity;
    totalWeight = 0;
  }
  // Constructor, makes a bin with an id number and a capacity

  public int numberOfElements(){return contents.size();}
  public boolean isEmpty(){return contents.isEmpty();}
  public boolean isFull(){return totalWeight >= capacity;}
  public int totalWeight(){return totalWeight;}
  public Vector contents(){return contents;}
  public int id(){return id;}
  public int capacity(){return capacity;}

  public String toString(){
    return " bin[" + id + "]=" + totalWeight +" "+ contents.toString();
  }

  public Enumeration elements(){return contents.elements();}
  // deliver an enumeration of the elements in the bin
  // This allows us to use hasMoreElements and nexElement
  // methods associated with the Enumeration class

  public void add(int n){
    totalWeight = totalWeight + n;
    contents.addElement(new Integer(n));
  }
  // add a number/weight n to the bin
  // since contents is a vector, and contains objects,
  // we turn the number to an Integer object.

  public boolean remove(int n){
    if (contents.removeElement(new Integer(n))){
      totalWeight = totalWeight - n;
      return true;
    }
    else 
      return false;
  }
  // remove a number/weight from a bin
  // if the number is in the contents of the bin, remove 
  // it and deliver true, otherwise attempt is made
  // to remove something that aint there, so deliver false

  public void clear(){
    contents.removeAllElements();
    totalWeight = 0;
  }
  // clear out the bin, removing all elements

  public boolean isLegal(){return totalWeight <= capacity;}
  // the bin is legal if the weight of the contents is
  // no greater than the capacity

    
}