class Entry{
  Object element;
  Entry next;
  Entry(Object element) {
    this.element=element;
    this.next=null;
  } 
  Object getElement(){
    return element;
  }
}
public class SinglyList1{
  Entry header=new Entry(null);
  
  Entry add(Object o){
    Entry newEntry=new Entry(o);
    Entry e=header;
    while(e.next!=null)
    e=e.next;
      e.next=newEntry;
    return newEntry;
  }
  Entry remove(){
    Entry e=header;
    if (e.next.next==null) return null;
    while (e.next.next!=null) 
    e=e.next;
    Entry temp=e.next;
    e.next=null;
    return temp;
  }
  public static void main(String[] args){
    Object ob1=new Object();
    Object ob2=new Object();
    Object ob3=new Object();
    SinglyList1 list=new SinglyList1();
    list.add("苹果");
    list.add("香蕉");
      list.add("柑橘");
      System.out.println(list.remove().getElement());
      System.out.println(list.remove().getElement());
      System.out.println(list.remove().getElement());      
  }
}