摘要：本文力求簡潔，只包含基礎的棧功能，不想將大片的代碼展示出來，讓讀者興趣索然，閱讀起來也十分費力，如有需要可以自行添加相關功能比如包中的類包含的，等等函數能力有限，有誤之處還請不吝賜教定義內部類用于存儲棧元素指向下一個棧元素的泛型元素方法方法

本文力求簡潔，只包含基礎的棧功能，不想將大片的代碼展示出來，讓讀者興趣索然，閱讀起來也十分費力，如有需要可以自行添加相關功能比如java.util.Stack包中的Stack類包含的peek()，empty()等等函數.
能力有限，有誤之處還請不吝賜教

    class Node {                                
        private Node below;   //指向下一個棧元素的reference                  
        private T type;           //泛型元素                                             
        public Node(Node below, T type) {       
            this.below = below;                 
            this.type = type;                   
        }                                       
    } 

    public void push(T element) {               
        if (top == null) {                      
            Node node = new Node(null, element);
            this.top = node;                    
            this.base = node;                   
            length++;                           
        } else {                                
            Node node = new Node(top, element); 
            this.top = node;                    
            length++;                           
        }                                       
    }   

  public T pop() {                            
        if (top != null) {                      
            Node temp = top;                    
            if (temp.below != null) {           
                top = temp.below;               
                length--;                       
            } else {                            
                this.base=null;                 
                this.top=null;                  
                length=0;                       
            }                                   
            return temp.type;                   
        } else return null;                     
    }                                                                                
    public int getLength() {                    
        return length;                          
    }  

整體代碼比較簡單，這里不再贅述，有一定java基礎的應該都能夠看懂

public class MyStack {                       
    private Node base;                          
    private Node top;                           
    private int length = 0;                     
    class Node {                                
        private Node below;                     
        private T type;                                                        
        public Node(Node below, T type) {       
            this.below = below;                 
            this.type = type;                   
        }                                       
    }                                           
    public void push(T element) {               
        if (top == null) {                      
            Node node = new Node(null, element);
            this.top = node;                    
            this.base = node;                   
            length++;                           
        } else {                                
            Node node = new Node(top, element); 
            this.top = node;                    
            length++;                           
        }                                       
    }                                           
    public boolean isEmpty(){                   
        if(base==null){                         
            return true;                        
        }else return false;                     
    }                                           
    public T pop() {                            
        if (top != null) {                      
            Node temp = top;                    
            if (temp.below != null) {           
                top = temp.below;               
                length--;                       
            } else {                            
                this.base=null;                 
                this.top=null;                  
                length=0;                       
            }                                   
            return temp.type;                   
        } else return null;                     
    }                                                                                
    public int getLength() {                    
        return length;                          
    }                                                                                        
    @Override                                   
    public String toString() {                  
        StringBuffer sb = new StringBuffer();   
        Node current = top;                     
        while (current != null) {               
            sb = sb.append("/"+current.type);   
            current = current.below;            
        }                                       
        return sb.toString();                   
    }                                           
    public static void main(String[] args) {    
        MyStack ms=new MyStack<>();     
        System.out.println(ms.getLength());     
        ms.push("value1");                      
        ms.push("value2");                      
        ms.push("value3");                      
        System.out.println(ms.getLength());     
        System.out.println(ms.pop());           
        System.out.println(ms.pop());           
        System.out.println(ms.getLength());     
        System.out.println(ms.toString());      
    }                                           
}   

更多關于java的文章請戳這里:（您的留言意見是對我最大的支持）

我的文章列表

Email:sxh13208803520@gmail.com