javap

 javap is a command-line utility provided by the Java Development Kit (JDK) that disassembles one or more class files and prints information about the members, methods, and fields of those classes. This tool is useful for inspecting the bytecode of Java classes and understanding their structure.

Here's a brief overview of how javap works:

• Command Syntax: The basic syntax for using javap is javap [options] [classes]. The [options] specify various command-line options that control the output format and level of detail, while [classes] are the fully qualified names of the classes to be disassembled.
• Output: When invoked with a class name, javap prints a summary of the class's structure, including information about its methods, fields, constructors, and access modifiers. By default, it displays the package, class, and method signatures in a human-readable format.
• Options: javap provides several options to customize the output and behavior:
• -c: Prints the disassembled bytecode instructions for each method.
• -s: Displays internal type signatures for fields and method return types.
• -v: Prints additional verbose information, including constant pool details.
• -l: Shows line and local variable tables for methods.
• -public, -protected, -package, -private: Filters members based on their access modifiers.

• Usage: Developers typically use javap for debugging, reverse engineering, or understanding the behavior of compiled Java classes. It can be particularly helpful when analyzing third-party libraries or troubleshooting issues related to bytecode generation.