The Java Language

CS 161 - Java

Java Programs and the Java Platform

Java Program (application, applet, servlet) bytecode

Java Application Programming Interface (standard packages; also bytecode)

Java Virtual Machine (executes bytecode)

Hardware, e.g., your PC, OSF1, workstations, rings, ...

• The Java Virtual Machine (JVM, a program) runs on hardware of some sort or another;

• A Java application (like your program) runs in the JVM

• Applications use the API. The API defines standard object types that are common to many programs needs.

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