javaアプリケーションを作成して、スタックのデータ読みと書きをシミュレートします。

   

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    import
     java.util.
    *
    ; 
    public
     
    class
     Stack{ 
    private
     ArrayList pool
    =
    new
     ArrayList(); 
    public
     Stack(){ } 
    public
     Stack(
    int
     n){ pool.ensureCapacity(n); } 
    public
     
    void
     clear(){ pool.clear(); } 
    public
     
    boolean
     isEmpty(){ 
    return
     pool.isEmpty(); } 
    public
     Object pop(){ 
    if
    (isEmpty()) 
    throw
     
    new
     EmptyStackException(); 
    return
     pool.remove(pool.size()
    -
    1
    ); } 
    public
     
    void
     push(Object el){ pool.add(el); } 
    public
     String toString(){ 
    return
     pool.toString(); } }
    //
    end clss Stack
     

   

import java.util.LinkedList;
import java.util.EmptyStackException;

public class LIStack{
	private LinkedList list=new LinkedList();
	
	public LIStack(){
	}
	
	public void clear(){
		list.clear();
	}
	
	public boolean isEmpty(){
		return list.isEmpty();
	}
	
	public Object topEl(){
		if(isEmpty())
			throw new EmptyStackException();
		return list.getLast();
	}
	
	public Object pop(){
		if(isEmpty())
			throw new EmptyStackException();
		return list.removeLast();
	}
	
	public void push(Object el){
		list.addLast(el);
	}
	
	public String toString(){
		return list.toString();
	}
}//end class LIStack

   

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    /*
     *          
    */
     
    public
     
    class
     ARStack{ 
    private
     
    int
    [] a; 
    private
     
    int
     MaxSize,nElem; 
    public
     ARStack(){ MaxSize
    =
    100
    ; a
    =
    new
     
    int
    [MaxSize]; nElem
    =
    0
    ; } 
    public
     
    void
     clear(){ nElem
    =
    0
    ; } 
    public
     
    boolean
     isEmpty(){ 
    return
     nElem
    ==
    0
    ; } 
    public
     
    int
     pop(){ 
    return
     a[
    --
    nElem]; } 
    public
     
    void
     push(
    int
     value){ a[nElem]
    =
    value; nElem
    ++
    ; } 
    public
     
    static
     
    void
     main(String[] args){ ARStack ar
    =
    new
     ARStack(); 
    for
    (
    int
     i
    =
    10
    ;i
    >=
    0
    ;i
    --
    ){ ar.push(i); } 
    while
    (
    !
    ar.isEmpty()){ System.out.println(ar.pop()); } } }