Part 1 http://techmytalk.com/2014/01/24/java-interview-reference-guide-part-1/ Posted on January 24, 2014 by Nitin Kumar JAVA Object Oriented Concepts Java in based on Object Oriented concepts, which permits higher level of abstraction to solve any p…

Preface Validating data is a common task that occurs throughout all application layers, from the presentation to the persistence layer. Often the same validation logic is implemented in each layer which is time consuming and error-prone. To avoid dup…

Spring Boot Reference Guide Authors Phillip Webb, Dave Syer, Josh Long, Stéphane Nicoll, Rob Winch, Andy Wilkinson, Marcel Overdijk, Christian Dupuis, Sébastien Deleuze, Michael Simons, VedranPavić, Jay Bryant 2.0.0.BUILD-SNAPSHOT Copyright © 2012-20…

在Web项目中,我们经常会设计一些与界面相对应的JavaBean作为Entity,而为了兼容前台传入的空值,有些字段我们会用包装类型而不是基本类型.可是往往我的Entity已经设计完成,很多时候我们会在原来的Entity基础上修改字段返回值类型,而不是删去重写.于是问题就来了,一些大意的同学仅仅把属性的基本类型(如long)改为包装类型(如Long),而并没有将setter/getter的类型一起修改. 这种情况会报错,而且报的错经常会让人摸不着头脑.下面列举了一种情况,是利用com.faste…

In this tutorial we will discuss about different types of questions that can be used in a Java interview, in order for the employer to test your skills in Java and object-oriented programming in general. In the following sections we will discuss abou…

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…

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…

来自Java官方的文档,作备忘使用. 简介: Java平台非常强调安全性,包括语言安全,密码学,公钥基础设施,认证,安全通信和访问控制. JCA是平台的一个主要部分,包含一个“提供者”体系结构和一组用于数字签名,消息摘要(哈希),证书和证书验证,加密(对称/非对称块/流密码),密钥生成管理和安全随机数生成等等.这些API允许开发人员将安全性轻松集成到应用程序代码中.这个架构是围绕以下原则设计的: 实现独立性:应用程序不需要实现安全算法.相反,他们可以从Java平台请求安全服务.安全服务在提供者(…

以下内容由http://hbase.apache.org/book.html#getting_started节选并改编而来. 运行环境:hadoop-1.0.4,hbase-0.94.22,jdk1.7.0_65 Chapter 1. Getting Started create a table in HBase using the hbase shell CLI, insert rows into the table, perform put and scan operations again…