The Java Language Environment

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Security in Java

Security commands a high premium in the growing use of the Internet for products and services ranging from electronic distribution of software and multimedia content, to "digital cash". The area of security with which we're concerned here is how the Java compiler and run-time system restrict application programmers from creating subversive code.

The Java language compiler and run-time system implement several layers of defense against potentially incorrect code. The environment starts with the assumption that nothing is to be trusted, and proceeds accordingly. The next few sections discuss the Java security models in greater detail.

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