For a full stack Java developer you should start with learning backend and front-end technologies From the backend perspective: Java, multithreading, collections, jdbc, etc. Spring framework Hibernate Get good hold of SQL. You can use mysql. Learn th…
Design a stack that supports push, pop, top, and retrieving the minimum element in constant time. push(x) -- Push element x onto stack. pop() -- Removes the element on top of the stack. top() -- Get the top element. getMin() -- Retrieve the minimum e…
一.Vector介绍 Vector可以实现可增长的动态对象数组.与数组一样,它包含可以使用整数索引进行访问的组件.不过,Vector的大小是可以增加或者减小的,以便适应创建Vector后进行添加或者删除操作.Vector和ArrayList也很相似,但是Vector是同步访问的(线程安全的),且Vector包含了许多不属于集合框架的传统方法. 1.Vector的继承关系 public class Vector<E> extends AbstractList<E> implement…