说起Java 7的Executors框架的线程池,同学们能想到有几种线程池,它们分别是什么? 一共有四个,它们分别是Executors的 newSingleThreadPool(), newCachedThreadPool(), newFixedThreadPool(),newScheduledThread(),四个静态方法,当然在java 8中还有一个newWorkStealingThreadPool(). 但今天这些这些不是咱们今天要说的重点,今天要说的重点是里边所使用的ThreadPool…

说起Java的HashMap相信大家都不是很陌生,但是对于HashMap内部结构有些同学可能不太了解,咱们下一步就将其展开. HashMap是基于Hash算法的,同理的还有HashSet和HashTable.我的一篇博文讲述了如果将Object作为Key的话,那么就需要注意重写其hashCode()和equals()方法,当然,这个equals()不是必要重写的,但是在Effective Java中这条是一条准则.那么针对这块有个问题,如果只写了hashCode方法不写equals或者反之呢?…

import java.awt.BorderLayout; import java.awt.EventQueue; import java.awt.Font; import java.awt.Graphics; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.net.URL; import javax.swing.JApplet; import javax.swing.JBu…

1.2. The Java "White Paper" BuzzwordsThe authors of Java have written an influential White Paper that explains their design goals and accomplishments. They also published a shorter summary that is organized along the following 11 buzzwords:1. Si…

4.7. PackagesJava allows you to group classes in a collection called a package. Packages are convenient for organizing your work and for separating your work from code libraries provided by others.The standard Java library is distributed over a numbe…

This is a new series of sharing core Java interview question and answer on Finance domain and mostly on big Investment bank.Many of these Java interview questions are asked on JP Morgan, Morgan Stanley, Barclays or Goldman Sachs. Banks mostly asked c…

今天起开始学习Java,学习用书为Core Java.之前有过C的经验.准备把自己学习这一本书时的各种想法,不易理解的,重要的都记录下来.希望以后回顾起来能温故知新吧.也希望自己能够坚持把自己学习这本书的整个过程记录下来. I want to put a ding in the universe. 基本术语:       Object Oriented Programming——OOP——面向对象编程 Application Programming Interface——API——应用程序编程接…

Java里面的String Conceptually, Java Strings are sequences of Unicode characters. Java里面的String都是Unicode字符串 Java does not have a built-in string type. java没有内建的字符串类型. Each quoted string is an instance of the String class. 每个引用的字符串都是一个String类的实例. 字符串是永恒的:…

We are sharing 25 java interview questions , these questions are frequently asked by the recruiters.Java questions can be asked from any core java topic . So we try our best to provide you the java interview questions and answers for experienced whic…

Difference between Vector and Arraylist is the most common  Core Java Interview question you will come across in Collection .  This question is mostly used as a start up question by the Interviewers before testing deep  roots of  the Collection  .Vec…