![]() Additionally, by not embedding this code within a user interface, In the inter-language procedures more easily. Since the inter-language calling procedure for Java is evolving, this allows us to accommodate any changes By using this intermediate class we have isolated that component of the application which contains inter-languageĬalls.Task, then this allows the task to be executed without ``freezing'' the interface. If one is running a computationally intensive It facilitated having the external code run as a separate thread.Originally we didn't have three steps, but adopted this practice for several reasons: ![]() Need for the intermediate step that of writing an intermediate class that ``wraps'' the C, C++ or Fortran code. The process that we use for creating Java interfaces consists of the three steps indicated in figure 2.Ī noticeable feature of the process is that we utilize three steps, rather than two. The process of creating a Java interface to C, C++ and Fortran Third and fourth sections we detail the construction of the Java classes which form the primary components of the In the second section we present the example which will form the basis of our discussion, and in the In the first section we outline the process that we follow for creating applications of the type described byįigure 1. Examples in C++ and Fortran are given (as is readily seen theĬ++ example is very close to what might be composed in C). Our example concerns the creation of a Java interface for a program which solves the heatĮquation in a two dimensional rectangular region. (and choices you will have to make) concerning the dividing line between the Java interface and routines written In addition to providing samples of the mechanisms for data exchange, the example also reveals the choices we made Java interfaces and implementing native methods can be combined to create a Java/"other language" application. In one aspect, this report is the presentation of an extended example demonstrating how this knowledge of writing With native methods, we assume that the reader has implemented a Java class that has at least one native method While, for completeness, we will outline the steps required to create and implement Java classes Here too, other documents describe the process of interfacing Java to Routines written in C, C++ and Fortran from Java comes under the heading of implementing and using "native" Is capable of writing a modest Java interface which accepts input and displays output to a user. Is well described in a variety of books and we will assume that the reader ![]() ![]() Interfaces and how to call routines written in C, C++ and Fortran from Java. In order to create applications which have the form indicated in Figure 1, one needs to know how to write Java The purpose of this document is toĭescribe, principally by means of an extended example, the process of creating a Java interface for a program written Thus, there is interest in creatingĪpplications in which the user interface, or other "application packaging", is written in Java, but theĬore computational component is written in C, C++, or Fortran (see Figure 1). Standardized and platform independent constructs for creating user interfaces, managing threads, networking, andĪ variety of other tasks associated with creating "applications". Unfortunately, C, C++ and Fortran do not contain (as Java does) That this situation will change in the near future. While people are debating whether or not Java is good for computationally intensive tasks, the fact is thatĬ, C++ and Fortran are the primary languages for those who do scientific/technical computing. Office of Scientific Research Grant F49620-96-I-0327 and National Science Foundation/ARPA Grant NSF-DMS-961584 These software components were developed in conjunction with the research supported by Air Force
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