Developer's Guide to Web Application Security

Figure 7.3 Dangerous Operations Are Not Allowed in the Sandbox

All Java code is executed in the JVM, which is essentially an interpreter that

translates the Java code and allows it to run on your PC—sort of like an interme-

diary between your Java code and your operating system. A JVM also exists in your

browser. As soon as a user surfs to your Web page with a browser, your Java applet

will begin executing on the browser virtual machine.

You may have seen or heard of various emulators available that allow your com-

puter to run programs written for another computer. For example, CCS64 is a pro-

gram for Windows that allows you to run old Commodore 64 ...