栈的实现
课程：JAVA · 编程练习
Java编程练习 - 栈的实现
练习内容
import java.util.ArrayList;\n\nclass Stack {\n private ArrayList<Integer> items;\n\n public Stack() {\n items = new ArrayList<>();\n }\n\n public void push(int item) {\n item
课程：JAVA · 编程练习
Java编程练习 - 栈的实现
import java.util.ArrayList;\n\nclass Stack {\n private ArrayList<Integer> items;\n\n public Stack() {\n items = new ArrayList<>();\n }\n\n public void push(int item) {\n item