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This is a list of the instructions that make up the Java bytecode, an abstract machine language that is ultimately executed by the Java virtual machine. [1] The Java bytecode is generated from languages running on the Java Platform, most notably the Java programming language.
Instruction class - indicates the type of command, e.g., interindustry or proprietary INS 1 Instruction code - indicates the specific command, e.g., "select", "write data" P1-P2 2 Instruction parameters for the command, e.g., offset into file at which to write the data L c: 0, 1 or 3 Encodes the number (N c) of bytes of command data to follow
In computer programming, a usage message or help message is a brief message displayed by a program that utilizes a command-line interface for execution. This message usually consists of the correct command line usage for the program and includes a list of the correct command-line arguments or options acceptable to said program.
Based on the specified command set and any subset, it provides a means to read and write sectors of data (similar to the low-level interface used to access a hard drive). Operating systems may treat a USB mass-storage device like a hard drive; users may partition it in any format (such as MBR and GPT), and format it with any file system.
In contrast, the CompactFlash format is described by completely open and free specifications. Has not kept up with the transfer rate, or speed, of other cards, notably CompactFlash and SD, but also the later versions of the Memory Stick. The fastest xD card offers less than 10% of the speed of current (2009) CompactFlash cards. [citation needed]
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Java bytecode is used at runtime either interpreted by a JVM or compiled to machine code via just-in-time (JIT) compilation and run as a native application. As Java bytecode is designed for a cross-platform compatibility and security, a Java bytecode application tends to run consistently across various hardware and software configurations. [3]
A rule of thumb in determining if a reply fits into the 4xx or the 5xx (Permanent Negative) category is that replies are 4xx if the commands can be repeated without any change in command form or in properties of the User or Server (e.g., the command is spelled the same with the same arguments used; the user does not change his file access or ...