Java

Java core memory allocation principle Reprinted: http://write.blog.csdn.net/postedit Java memory allocation and management is one of the core technologies of Java. We have previously introduced Java memory management and Memory leakage and

  Manual installation and registration of Java Plugin for Linux   JDK documentation When you install the Java platform, the Java Plugin file is encoded as part of that install. if you want to use Java within Firefox,

Public void download (string filepath, httpservletresponse response, Boolean isonline) throws exception {// one way to open files online is supported: file F = new file (filepath); If (! F. exists () {response. senderror (404, "file not found! ");

[Java reflection mechanism] _ reflection Application -- get the structure notes of the class Objectives of this chapter:You can use reflection to obtain all the Implemented interfaces.You can use reflection to obtain the parent class inherited by a

Java Object-Oriented Programming IThree main features: Encapsulation: Encapsulation Inheritance: Inheritance Polymorphism: PolymorphismCreation object: Person per = NULL; // declare an object Per = new person (); // instantiate the object Or Person

---- The author of this book is talking to himself. Note: This article was written before publication ......The publication of the book "Java programmer, work at that point" is really a wave of twists and turns, but in any case this book is about to

I recently used Java to write programs and found that these two functions are not well mastered. So I have been studying these functions for a long time. The contains method is redefined to quickly check whether an element already exists in the set.

1 Singleton mode ensures that a class has only one instance and provides the instance to the entire system.2 features:3 1. One class can only have one instance4 2. Create your own instance5 3. Use this instance throughout the system6 Examples: In

Reproduced from http://blog.sina.com.cn/s/blog_5f79a56a0100c6ig.html As we all know, the three basic features of object-oriented in Java are: [encapsulation], [inheritance], and [polymorphism] I. EncapsulationObjects must have a clear boundary;

Http://blog.csdn.net/wwww1988600/article/details/7309070     In Java, You can implement multithreading in two ways. One is to inherit the Thread class and the other is to implement the runnable interface; The thread class is defined in the Java.

Multithreading is a mechanism that allows concurrent execution of Multiple Instruction Streams in a program. Each instruction stream is called a thread and is independent of each other. A thread is also called a lightweight process. It has

Package collection; Import java. util .*; Public class newset {Public static void main (string [] ARGs ){Set students = new hashset ();For (INT I = 0; I Students. Add (new student ("happy" + I, "male" + I, 20 + I ));}Students. Add (new student

1: Download jdk-1_5_0-linux-i586.bin 2: mkdir/usr/Java CD/usr/Java 3:./jdk-1_5_0-linux-i586.bin 4: Vim/etc/profile 5: Add: Export java_home =/usr/Java/jdk1.5.0 Export Path = $ java_home/bin: $ java_home/JRE/bin: $ path Export tomcat_home =/usr/local/

Since programming, it seems that in addition to the VB period, the. NET and Java periods have a crucial relationship with XML .. In net, both C/S and B/S are at least related to a *. config file. The essence is the XML file. In the Java era, the Web.

Java 5 adds a new class library concurrency set java. util. Concurrent, which provides a wide range of API multi-threaded programming for concurrent programs, making Java 5 easier and more flexible. This article uses a network server model to

Confusions of Java vs. Net programmers Odinjobs.com recently made a survey on J2EE and. net's employment market and salary are compared. From the average salary of the two technologies, they are in the role of Architect/lead. net's average salary

How does JVM Understand Java generic classes? View plaincopy to clipboardprint?// Generic codePublic class pair {Private t first = NULL;Private t second = NULL;Public pair (T fir, t Sec ){This. First = FIR;This. Second = sec;}Public t getfirst

Ouyang Chen (yeekee@sina.com)Zhou Xin (zhouxin@sei.pku.edu.cn) The garbage collector (GC) is basically transparent to Java programmers, however, a good Java programmer must understand the working principle of GC, how to optimize GC performance,

A socket is the end of bidirectional communication between two programs running on the network. It can accept or send requests and conveniently write data transmission over the network. In Java, there are specialized socket classes to process user

The requirements of the employee salary management system are as follows: /*** Author: Kevin* Date: 20110-7-15* Function: Use arraylist to build a system of employeesalarymangement,* The system is useful for manager to add new employee 'information,