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this section provides quick descriptions of terms related to java tools.
jar: the jar manager - a command line tool for managing jar files.
jarsigner: the jar signer - a command line tool for signing jar files and verifying signed jar files.
java: the java launcher - a command line tool to launch java applications.
javac: the java compiler - a command line tool to compile java source files.
javap: the java class file disassembler - a command line tool that reads java bytecode class files and disassembles them.
jconsole: a graphical user interface tool that enables you to monitor and manage java applications and virtual machines on a local or remote machine using the jmx technology.
jdb: the java debugger - a command line tool to debug java applications.
jdeps: the java class dependency analyzer - a command line tool to show package level and class level dependencies.
jdi (java debug interface): a high level java api providing information useful for debuggers and similar systems needing access to the running state of a (usually remote) virtual machine.
jhat (discontinued since jdk 9) - heap dump browser: starts a web server on a java heap dump file (eg, produced by jmap -dump), allowing the heap to be browsed.
jinfo: prints configuration information for a given jvm process or a java core file on the local machine or on a remote machine through a debug server.
jlink - jre linker: assembles and optimizes a set of modules and their dependencies into a custom jre.
jmap - memory map: prints shared object memory maps or heap memory details of a given jvm process or a java core file on the local machine or on a remote machine through a debug server.
jmc - java mission control: invokes a gui tool suite for managing, monitoring, profiling, and troubleshooting your java applications. when first installed, java mission control consists of the jmx console and the java flight recorder.
the jvm(tm) tools interface, jvm ti. this is a low-level native interface that defines the services a java virtual machine provides for tools, including debugging. jvm ti is new in j2se 5.0 and replaces jvmdi and jvmpi, both of which are deprecated and will be removed in a future release.
jrunscript - script code shell: runs script code in javascript or other languages interactively or in batch mode.
jsadebugd - serviceability agent debug daemon: attaches to a jvm process or a java core file and acts as a debug server for remote tools to connect.
jshell - java shell: provides an interactive shell for evaluating java declarations, expressions, and statements.
jstack - stack trace: prints a stack trace of threads for a given jvm process or a java core file on the local machine or on a remote machine through a debug server.
jvisualvm - java visualvm: a visual interface for viewing detailed information about java applications while they are running on a java virtual machine (jvm), and for troubleshooting and profiling these applications. java visualvm federates previously standalone tools like jconsole, jstat, jinfo, jstack, and jmap to obtain data from the jvm software, then re-organizes and presents the information graphically, to enable you to view different data about multiple java applications uniformly, whether they are running locally or on remote machines.
jvm (java virtual machine): a software that simulates a central process unit (virtual machine) to run compiled java code.
keystore: a database used by jdk keytool command and keystore class to store your own private keys, and public key certificates you received from someone else.
keytool: a command line tool introduced in jdk 1.2 to manage keys and certificates using keystore. keytool replaces the same functions offered by javakey in jdk 1.1.
native2ascii: native-to-ascii encoding converter - a command line tool that reads a text file stored in a non-ascii encoding and converts it to an ascii text file. all non-ascii characters will be converted into \uxxxx sequences, where dddd is the unicode code value of the non-ascii character.
serialver: a command line tool that can be used to generate a uniqe serialversionuid value for any given serializable java class.

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