Java Virtual Machine is a comprehensive programming guide for the JVM. It contains an overview of the machine; a guide to the instruction set; and a reference section that describes the Java class file format in detail and lists all JVM instructions alphabetically, by function, and by opcode. This book complements the JVM specification by providing a higher-level description of JVM semantics, along with many examples and tutorials. The enclosed disk contains the code for the examples as well as Jasmin, a Java assembler. Jasmin takes ASCII descriptions of Java classes and converts them into binary Java class files suitable for loading into a Java interpreter. With Jasmin, all of the examples in the book can be compiled and executed.