Class ExpiringStack

  • All Implemented Interfaces:
    java.io.Serializable

    public class ExpiringStack
    extends java.lang.Object
    implements java.io.Serializable
    A unbounded stack with expiration.
    See Also:
    Serialized Form
    • Constructor Summary

      Constructors 
      Constructor Description
      ExpiringStack()
      Construct a new, empty stack.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void clear()
      Clears this stack.
      void expireBefore​(long time)  
      java.lang.Object first()
      Returns the first element of the stack.
      boolean isEmpty()
      Returns true if the stack is empty.
      java.lang.Object last()  
      java.lang.Object pop()
      Pops from this stack.
      void push​(java.lang.Object obj)
      Push into this stack.
      void remove​(java.lang.Object o)  
      int size()
      Returns the number of elements in the stack.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • ExpiringStack

        public ExpiringStack()
        Construct a new, empty stack.
    • Method Detail

      • clear

        public void clear()
        Clears this stack.
      • pop

        public java.lang.Object pop()
        Pops from this stack.
        Returns:
        null, if this stack is empty or the element is really null.
      • push

        public void push​(java.lang.Object obj)
        Push into this stack.
      • remove

        public void remove​(java.lang.Object o)
      • expireBefore

        public void expireBefore​(long time)
      • first

        public java.lang.Object first()
        Returns the first element of the stack.
        Returns:
        null, if the stack is empty, or the element is really null.
      • last

        public java.lang.Object last()
      • isEmpty

        public boolean isEmpty()
        Returns true if the stack is empty.
      • size

        public int size()
        Returns the number of elements in the stack.