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Java uses generics to implement stack structure example sharing

高洛峰
高洛峰Original
2017-01-18 11:14:011336browse

Idea analysis: Since the stack structure is implemented using generics, you cannot use the stack package that comes with the JDK. You need to define a stack structure yourself, such as LinkedList.

The code is as follows:

Stack.java:

package cn.edu.xidian.crytoll;
import java.util.LinkedList;

public class Stack<T> {

    private LinkedList<T> container = new LinkedList<T>();

    public void push(T t) {
        container.addFirst(t);
    }

    public T pop() {
        return container.removeFirst();
    }

    public boolean empty() {
        return container.isEmpty();
    }
}

StackTest.java:

package cn.edu.xidian.crytoll;

public class StackTest {
    public static void main(String[] args) {
        Stack<String> stack = new Stack<String>();
        System.out.println("向栈中增加字符串:");
        System.out.println("视频学Java");
        System.out.println("细说Java");
        System.out.println("Java从入门到精通(第2版)");
        stack.push("视频学Java");  //向栈中增加字符串
        stack.push("细说Java");   //向栈中增加字符串
        stack.push("Java从入门到精通(第2版)"); //向栈中增加字符串
        System.out.println("从栈中取出字符串:");
        while (!stack.empty()) {
            System.out.println((String) stack.pop());//删除栈中全部元素并进行输出
        }
    }
}

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