public class ExpiringStack extends Object implements Serializable
Constructor and Description |
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ExpiringStack()
Construct a new, empty stack.
|
Modifier and Type | Method and Description |
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void |
clear()
Clears this stack.
|
void |
expireBefore(long time) |
Object |
first()
Returns the first element of the stack.
|
boolean |
isEmpty()
Returns
true if the stack is empty. |
Object |
last() |
Object |
pop()
Pops from this stack.
|
void |
push(Object obj)
Push into this stack.
|
void |
remove(Object o) |
int |
size()
Returns the number of elements in the stack.
|
public void clear()
public Object pop()
null
, if this stack is empty or the element is
really null
.public void push(Object obj)
public void remove(Object o)
public void expireBefore(long time)
public Object first()
null
, if the stack is empty, or the element is
really null
.public Object last()
public boolean isEmpty()
true
if the stack is empty.public int size()
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