--%>
Assignment Help - homework help

Environment Modeling in Java Pathfinder

Environment Modeling: In JPF, Java class files can be processed in two different ways:

A) As ordinary Java classes managed and executed by the host JVM (e.g., standard Java library classes, JPF implementation classes)

B) As “modeled” classes managed and processed (verified) by JPF

We have to clearly distinguish between these two modes. In particular, JPF’s “Model” layer has its own class and object model, which is completely different than and incompatible with the hidden class and object models of the underlying host JVM executing JPF.

Each standard JVM supports a Java Native Interface (JNI), that is used to delegate execution from the JVM-controlled bytecode down into the platform-dependent native layer (machine code). This is normally used to interface certain functionalities such as I/O or graphics to the platform OS and architecture. JPF provides an analogous mechanism to lower the “execution” level in JPF from JPF-controlled bytecode into JVM-controlled bytecode. This mechanism is called Model Java Interface (MJI). It supports the creation of dedicated classes to be executed by the underlying JVM rather than JPF. Such classes are not model checked by JPF.

   Related Questions in Programming Languages

  • Q : Explain the relationship between XHTML

    Explain the relationship between XHTML and XML?

    		•
  • Q : Distinct features of Object oriented

    Q. What are the distinct features of Object oriented programming language?  

    Q : Define Indirect recursion Indirect

    Indirect recursion: Recursion which outcomes from method Y calling method X, whenever an existing call from X to Y is still in development or progress.

    		•
  • Q : Define Protocol Protocol : It is a set

    Protocol: It is a set of rules for interaction between two processes. The protocol is generally specified in a Uniform Resource Locator (abbreviated as URL) to point out how a specific resource must be transferred from a Web server to the requesting c

    		•
  • Q : Write the benefits of DLR Write the

    Write the benefits of DLR?

    		•
  • Q : Passing by address or reference Passing

    Passing by address or reference: In this technique no separate memory build for formal variables that is, formal variables share similar location of actual variables and therefore any change on formal variables automatically reflected back to real var

    		•
  • Q : What is Reader class Reader class : It

    Reader class: It is sub-class of the Reader abstract, stated in the java.io package. Reader classes translate input from the host-dependent character set encoding into the Unicode.

    		•
  • Q : Define Number of Interleavings Number

    Number of Interleavings: Besides the raw number of threads, the state space is affected by the number of potential interleavings of these threads. While there exist automated techniques (partial-order reduction) to reduce these interleavings, most mod

    		•
  • Q : Define Application Application : It is

    Application: It is frequently used, simply as a synonym for the program. Though, in Java, the word is particularly employed of programs with a Graphical User Interface (GUI) which are not applets.

    		•
  • Q : Define the term Boot Boot: Whenever a

    Boot: Whenever a computer is switched on it is said to be `boot up'. This word comes from the phrase, “Pulling yourself up by your bootstraps”. Before a computer is ready to be utilized, it should load the programs which it requires from i

    		•