It is maintained and evaluated by the jGRASP Team. JGRASP was created by James Cross and Larry Barowski at the Department of Computer Science and Software Engineering in the Samuel Ginn College of Engineering at Auburn University. JGRASP also generates UML diagrams for Java, with interactive dependency information. The metric includes common measures, such as reachability and content complexity, which can be displayed individually. jGRASP generates CPGs for both Java and Ada. Its purpose is to aid in identifying overly complex areas of source code. The Complexity Profile Graph (CPG) is a statement-level complexity diagram. Multiple viewers can be combined on a single viewer canvas window and the contents can be saved to file. Other viewers show, for example, a color swatch for a Color, the image for an icon, and the binary details of a double. Common data structures are automatically identified and displayed structurally. The result is animated when changes occur, as when a node is added to a linked list. Structural views of linked data structures display local variable nodes and their relation to the main structure. Structural views show the internal structure of trees, linked lists, hash tables, etc. For example, a content-based view shows ArrayList and LinkedList in an identical way, as a list of elements. The Java object viewers in jGRASP provide interface-based, structural, and other views of data structures and other objects and primitives during debugging and workbench operations. The editing window provides CSD-based folding and a "context hint" feature that displays the first line of a code structure that is off-screen when the mouse is hovered over its CSD structure. jGRASP produces CSDs for Java, C, C++, Objective-C, Ada, and VHDL. Its purpose is to improve the readability of source code. The Control Structure Diagram (CSD) is a control flow diagram that fits into the space normally taken by indentation in source code. It can be configured to work with most free and commercial compilers for any programming language. The jGRASP web site offers downloads for Windows, Mac OS, and as a generic ZIP file suitable for Linux and other systems.įor languages other than Java, jGRASP is a source code editor. GRASP (Linux, UNIX) and pcGRASP (Windows) are written in C/C++, whereas jGRASP is written in Java (the "j" in jGRASP means it runs on the JVM). JGRASP is implemented in Java, and runs on all platforms with a Java Virtual Machine (Java version 1.8 or higher). The runtime data structure visualizations are also available as plugins for IntelliJ IDEA, Android Studio, and Eclipse. It produces static visualizations of source code structure and visualizations of data structures at runtime. Runtime errors are even harder to debug than syntax errors.JGRASP is a development environment that includes the automatic creation of software visualizations. When you run the program (or view an applet), it doesn t work right. The other type of error is called a logic or runtime error. Even though you fix all of the syntax errors in a program, it doesn t necessarily mean there are no more errors. The compiler helps you find syntax errors errors in spelling, punctuation, capitalization, words out of order, etc. Debugging is the process of finding and fixing errors in a program. A Second Java Example Debugging Now you should see a successful compile and the message Operation Complete. Scanner scan = new Scanner(System.in) Compile the program again. The real problem here is that the s on system should be a capital S. The error message is cannot find symbol which doesn t tell you much. The level 2 error messages are usually not very helpful. Although you might think it s just a simple typo, Java thinks it s a more complex error than the missing semicolon. 9 A Second Java Example Debugging Now you should see one error message, but it s a different error.
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