A Java Archive, or JAR file, contains all of the various components that make up a self-contained, executable Java application, deployable Java applet or, most commonly, a Java library to which any ...

I installed java today and created the traditional hello world console application called first.java. I set the PATH stuff and whatnot, and the Sun tutorial says type in "javac first.java".

Java is a fairly important technology to have on any operating system. Countless Web sites make use of Java or JavaScript; programs such as Zend Studio are Java applications that require the Java ...