cool java programs

JDK "Java Development Kit": Java Developer kitJRE "Java Runtime Environment": Java Runtime EnvironmentJVM "Java Virtual machine": Java VMJRE: The runtime environment, including the core class libraries required by the JVM and

How to create executable Java programs Detailed description of executable jar packages and jar commands I often see someone asking on the internet how to compile a Java program into a. EXE file. Generally, there are only two answers. One is to create an executable JAR file package, and then double-click it to run it like the. chm file. The other is to use jet.Co

objects.2. Preparation knowledgeBefore analyzing this example, let's take a look at several concepts about threads, locks, semaphores, and Java APIs.LockFor most programs, they need to communicate with each other to complete the life cycle of the entire thread. The simplest way to achieve synchronization between threads is locking. To prevent the two associated threads from mistakenly accessing shared reso

A network relational database application system is a three-tiered structure. The client and the server use the network connection, the client-side application communicates with the server-side database program according to the communication Protocol; The database service program communicates with the database management system through the SQL command. There are two ways to connect Java programs to the dat

Package Demo_pack1IsDeptrec Dept%rowtype;V_sqlcode number; V_sqlerr VARCHAR2 (2048);FUNCTION query_dept (dept_no in number)RETURN INTEGER;FUNCTION query_dept (dept_no in VARCHAR2)RETURN INTEGER;END Demo_pack1;Attention:1, if the parameters of two sub-programs are only different names and ways, they cannot be overloaded.Example: PROCEDURE overlodeme (p_parameter in number)PROCEDURE Overlodeme (p_parameter out number)2. Cannot be overloaded based on th

Java Programmers need to mix Object-oriented Thinking and general imperative programming methods in programming. Whether the two can be perfectly combined depends entirely on the programmer's level:Skills (anyone can easily learn imperative programming)Mode (some people use "Mode-mode". For example, the mode can be applied anywhere and can be classified as a certain type of mode)Mood (first of all, writing a good object-oriented program is much harder

Fan Huan is a Java enthusiast. Email: heydaymail@hotmail.com Blog: http://heyday.blogone.net 2005-6-13 Reference address Introduction Java is a cross-platform language. We often encounter the need to call certain programs in windows through Java. Some third-party vendors such as ant also pr

If there are any shortcomings, please understand and welcome the criticism, not very grateful.Please respect the author's labor results:This article original pipi-changingOriginal source of this article: http://www.cnblogs.com/pipi-changing/This document is owned by the author and the blog Park and must be retained without the author's consent.And in the article page obvious location to the original link, otherwise reserves the right to pursue legal responsibility.tips for debugging

underlined part, change as you want.Library Name: Libclass Name: MyClassThe first line should be commented out! (I don't know the reason). However, the Java code is not commented out when it is written, the runtime will comment, because it will be a little different. Once you've written your code, you're ready to run.regenerate into a Java fileFile----> New---->java