java scjp

We usually use some of the software, a part of the need for Java environment support, but sun so many products, let people dazzling version number, before looking at the same abbreviation, let us choose the time often deterred, had to follow the feeling to go. So here's what I'm going to be trying to tell you about, first of all, let's look at the many Sun products::http://developers.sun.com/downloads/Haha has not expanded their sub-options, let peopl

version even if the serialized class does not change. Public class DUID implements java. io. Serializable {public void method (){}} Add a UID in it. When the serialization form of this class changes, you can also change this UID. Public class DUIDFixed implements java. io. Serializable {Public void method (){}Private static final long serialVersionUID = 1;} 　　 (10) definit

The purpose of this article is to summarize some of my experience in using Java for many years, mainly related to some Java basic knowledge points, so also want to share to just get started Java programmer and intend to enter the Java development of this profession of prospective novice, hope can give you some experien

=-1;I >>>= 10;System.out.println (i);Long L =-1;L >>>= 10;System.out.println (l);Short S =-1;S >>>= 10;System.out.println (s);byte B =-1;b >>>= 10;System.out.println (b);}}Output results:419430318014398509481983-1-1 ===============================================================================Also have to mention, is also very implicit point, that is I found on Einstein blog, he said is SCJP on the topic,Excerpts from his article are as follows: SCJ

The purpose of this article is to summarize some of my experience in using Java for many years, mainly related to some Java basic knowledge points, so also want to share to just get started Java programmer and intend to enter the Java development of this profession of prospective novice, hope can give you some experien

Before learning Java, a question for a real beginner (that is, learning Java from scratch): What is Java and then how to learn Java? Java is the high-level programming language introduced by Sun Microsystems in 1995, which is divided into

The main function of serialization in Java is to lossless the instance of a class, or it is through the Java serialization mechanism that instances of Java classes can be transmitted and retrieved through an object stream without damaging instances of the class. First, let's look at what class is a serialized class, The 1.A class itself implements the Serializabl

Java basic notes (1) JAVA's historical Java Build Environment, java build In addition to setting up, this article focuses on reading novels and reading them. If you don't want to read them, you can grasp the focus directly. I will change the color to indicate the focus! English is one of the most important ways for people to communicate with each other.

Can I learn java training for girls without any foundation in Wuhan? Wuhan Java female programmer's career path, Wuhan java I,Java training in WuhanCan girls with zero base learn it? Most people think that the IT industry in Wuhan is a place for boys. In fact, this is a violation of girls' abilities. In school and soci

Java Se=java Standard EditionJava Ee=java Enterprise EditionJava Me=java Mobile EditionSE is mainly used for desktop programs, console development (JFC)EE Enterprise-level development (JSP,EJB)Me embedded development (mobile phone, small appliances) Currently, there are 3 versions of the

Currently, there are 3 versions of the Java 2 platform, which are Java 2 platform Micro (Java 2 Platform Micro edition,j2me) for small devices and smart cards, Java 2 Platform Standard Edition for desktop systems (Java 2 Platform Standard edition,j2se),

------Java Training, Android training, iOS training,. NET training, look forward to communicating with you! -------Java language Basics (1)Starting with this diary, I'll start with some basic knowledge about Java,1 Java language OverviewThe founder of Java-James Goslin (Jame

JAVA notes: Java Database Programming (4): Processing Big Data Objects, java Database Programming Big Data Objects refer to two types of fields: CLOB and BLOB. CLOB can store massive volumes of text, such as a novel. Binary files, such as movies and images, can be stored in BLOB. To process large data objects in a program, you must use PreparedStatement, all cont

lows on the right are used at this point to prevent moving more than the number of bits in the Long value. But you may also experience a problem when you make an unsigned right shift. If you perform a right shift operation on a byte or a short value, may not get the correct result (Java 1.0 and Java 1.1 are particularly prominent). They are automatically converted to type int and are shifted to the right

Java --- Java interview questions (1), java --- java interview questions 1. What is a Java Virtual Machine? Why is Java called a platform-independent programming language "? Java