Java8实现任意参数的链栈

 /**
  * The main function.
 */
 public static void main(String[] args) {
  MyLinkedStack <Character> test = new MyLinkedStack<>();
  test.push('2');
  test.push('+');
  test.push('-');
  test.pop();
  test.push('(');
  test.display();
}

package DataStructure;

/**
 * @author: Inki
 * @email: inki.yinji@qq.com
 * @create: 2020 1026
 * @last_modify: 2020 1026
 */

public class MyLinkedStack <AnyType> {

 /**
  * Only used to store the head node.
  */
 private SingleNode<AnyType> head = new SingleNode(new Object());

 /**
  * The single linked list current size.
  */
 private int size = 0;

 /**
  * Push element to the end of the list.
  * @param:
  *  paraVal: The given value.
  */
 public void push(AnyType paraVal) {
  SingleNode <AnyType> tempNode = new SingleNode<>(paraVal);
  tempNode.next = head.next;
  head.next = tempNode;
  size++;
 }//Of push

 /**
  * Pop the last element.
  * @return:
  *  The popped value.
  */
 public AnyType pop(){

  if (size == 0) {
   throw new RuntimeException("The stack is empty.");
  }

  AnyType retVal = head.next.val;
  head.next = head.next.next;
  size--;
  return retVal;
 }//Of pop

 /**
  * Get the current size of the single linked list.
  * @return:
  *  The current size of the single linked list.
  */
 public int getSize() {
  return size;
 }//Of getSize

 /**
  * Display the single linked list.
  */
 public void display() {

  if (size == 0) {
   throw new RuntimeException("The stack is empty.");
  }//Of if

  System.out.print("The linked stack is:\n[");
  SingleNode <AnyType> tempNode = head;
  int i = 0;
  while (i++ < size - 1) {
   tempNode = tempNode.next;
   System.out.printf("%s, ", tempNode.val);
  }//Of while
  System.out.printf("%s]\n", tempNode.next.val);
 }//Of display

 /**
  * The main function.
  */
 public static void main(String[] args) {
  MyLinkedStack <Character> test = new MyLinkedStack<>();
  test.push('2');
  test.push('+');
  test.push('-');
  test.pop();
  test.push('(');
  test.display();
 }
}//Of class MyLinkedStack


class SingleNode <AnyType>{

 /**
  * The value.
  */
 AnyType val;

 /**
  * The next node.
  */
 SingleNode<AnyType> next;

 /**
  * The first constructor.
  * @param
  *  paraVal: The given value.
  */
 SingleNode (AnyType paraVal) {
  val = paraVal;
 }//The first constructor

}//Of class SingleNode