" The Java Class Path" discusses the details of how and where J/Link finds classes. Suppress the type checking that is normally inserted in definitions for calls into Java Make static methods and fields accessible only in their fully qualified class context Make static methods and fields accessible by just their names, not in a special context To Wolfram Language users, then, the "installable Java" feature of J/Link opens up the expanding universe of Java classes as an extension to the Wolfram Language for Java users, it allows the extraordinarily powerful and versatile Wolfram Language environment to be used as a shell for interactively developing, experimenting with, and testing Java classes. You could say that the Wolfram Language becomes a scripting language for Java. J/Link brings this same productive environment to Java programmers. Wolfram Language users have the luxury of working in a true interpreted, interactive environment that lets them experiment with functions and build and test programs a line at a time. To use Java you must write a complete program, compile it, and then execute it (some environments exist that let you interactively execute lines of Java code, but these are special tools, and similar tools exist for traditional languages like C). In fact, J/Link makes the procedure go away completely, which is why Java becomes a transparent extension to the Wolfram Language.Īlthough Java is often referred to as an interpreted language, this is really a misnomer. You will see later how J/Link vastly simplifies this procedure for Java compared to languages like C or C++. This facility is called "installable Java" because it generalizes the ability that the Wolfram Language has always had to plug in extensions written in other languages through the Install function. In effect, all of Java becomes a transparent extension to the Wolfram Language, almost as if every existing and future Java class were written in the Wolfram Language itself. You also do not need to know anything about the Wolfram Symbolic Transfer Protocol (WSTP). You do not need to write any Java code, or prepare in any way the Java classes you want to use. You can create objects and call methods directly in the Wolfram Language. J/Link provides Wolfram Language users with the ability to interact with arbitrary Java classes directly from the Wolfram Language. Writing Your Own Installable Java Classes Implementing a Java Interface with Wolfram Language Code Getting Information about Classes and ObjectsĬontrolling the Class Path: How J/Link Finds Classes Returning Objects "by Value " and "by Reference"Ĭreating Windows and Other User Interface Elementsĭrawing and Displaying Wolfram Language Images in Java WindowsĬonversion of Types between Java and the Wolfram Language
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