Stacks (Apache Calcite API)

java.lang.Object
- org.apache.calcite.util.Stacks

```
@Deprecated
public class Stacks
extends java.lang.Object
```
Deprecated.

Utilities to make vanilla lists look like stacks.

Constructor Summary

Constructors
Modifier Constructor Description

private Stacks()
Deprecated.

Method Summary

All Methods Static Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`static <T> T`	`peek(int n, java.util.List<T> stack)`	Deprecated. Returns the `n`th most recently added element in the stack.
`static <T> T`	`peek(java.util.List<T> stack)`	Deprecated. Returns the most recently added element in the stack.
`static <T> T`	`pop(java.util.List<T> stack)`	Deprecated. Removes an element from the stack and returns it.
`static <T> void`	`pop(java.util.List<T> stack, T element)`	Deprecated. Removes an element from the stack.
`static <T> void`	`push(java.util.List<T> stack, T element)`	Deprecated. Adds an element to the stack.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Stacks
```
private Stacks()
```
    Deprecated.
- Method Detail
  - peek
```
public static <T> T peek(java.util.List<T> stack)
```
    Deprecated.
    
    Returns the most recently added element in the stack. Throws if the stack is empty.
  - peek
```
public static <T> T peek(int n,
                         java.util.List<T> stack)
```
    Deprecated.
    
    Returns the nth most recently added element in the stack. Throws if the stack is empty.
  - push
```
public static <T> void push(java.util.List<T> stack,
                            T element)
```
    Deprecated.
    
    Adds an element to the stack.
  - pop
```
public static <T> void pop(java.util.List<T> stack,
                           T element)
```
    Deprecated.
    
    Removes an element from the stack. Asserts of the element is not the one last added; throws if the stack is empty.
  - pop
```
public static <T> T pop(java.util.List<T> stack)
```
    Deprecated.
    
    Removes an element from the stack and returns it.
    Throws if the stack is empty.