Java从入门到进阶,我会推荐这8本书,而且这份书单已经获得2500+的赞和收藏,是知乎热门内容。 除了推荐书籍外,第2部分还会分享本人自学Java并拿到阿里巴巴校招offer的方法论。 本回答字数长达1万+,建议点赞收藏防止迷路~ 下面是书籍推荐的原回答链接: 先贴一张Java技术栈的全局图: Java的核心难点在于知识点太多,如果...
Another good Java interview question, I think answer is not sufficient but here it is “Substring creates new object out of source string by taking a portion of original string”. see my post How SubString works in Java for detailed answer of this Java question. 5. Which two method you ne...
For example, if I asked about this question on System design interview then I would approach it...
Question: We have an application for which we need to implement RateLimiter, Rate Limiter is an interface which will play a role to limit the number of Request client send to Server in a given time. In the Current Question, it was asked to implement a rate limit who will do 2 things...
8) How do you prevent for creating another instance of Singleton using reflection?Open to all. In my opinion throwing exception from constructor is an option.Answer:This is similar to previous interview question. Since constructor of Singleton class is supposed to beprivateit prevents creating insta...
MapString,Stringoption=choiceQuestionList.get(idx).getOption(); for(Stringkey:option.keySet()){ detail.append(key).append(:).append(option.get(key)).append(\r\n);; } detail.append(答案:).append(choiceQuestionList.get(idx).getKey()).append(\r\n\n); } returndetail.toString(); } pu...
Question: Why Map interface does not extends Collection interface? Answer: Map is (key, value) pair not a collection of one type of values so it does not extends Collection interface. Collection interface accept single object via add(E e) but Map interface requires key, value pair in method...
package javaPractice;public class TheFeet { / 兔子和鸡共十三个头,四十只脚,问多少鸡和兔子,java解决 / public static void main(String[] args) { int rabbit = 0;// 兔子的数量 int chicken = 0;// 鸡的数量 for (rabbit = 1; rabbit <= 13; rabbit++) { for (chicken = 0; ...
Enthuware OCP Java Practice Tests Features 600+ Questions divided into 9 Mock Exams EVERY QUESTION HAS AN EXPLANATION Questions covering all exam objectives Highly Customizable - Standard tests, Sectionwise/Objectivewise tests, and Custom tests Helpful URLs/Resources Comparative Scores - See OCAJP...
package com.practice; public class YangHuiSanJiao { public static void main(String[] args) { int [][]a = new int [10][10]; for(int n = 0; n < 10;n++) { a[n][0] = 1; a[n][n] = 1; } for(int n = 2; n <10; n++) { ...