There are two types of Java program; there is either an application or an applet. An application has no restrictions; therefore it is able to use the full power of Java. It is possible for a Java application to read, write and modify files and to manipulate memory. Applets are restricted as a means of security and are found embedded in web pages, embedded in the HTML (Hyper Text Mark-up Language). As they are embedded in HTML it is essential to run an applet that you have a Java compatible browser. Applets can run automatically when

When the verifier verifies the code it then guarantees that the code is:

„h Control the ability to shut down the VM (Virtual Machine)

One of the main objectives of Java is to make code mobile. As this is the case it requires the ability to load code from outside the system, into the system, Java uses a class loader to do this. Class loaders determine when and how classes can be added to a running java environment. They are designed to prevent impostors replacing important parts of Java run time with code that an applet tries to install.

Some topics in this essay:
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