What is JDK tools? Explain with their use.

What is JDK tools? Explain with their use.

Here are the options provided by some commonly used Java Development Kit (JDK) tools and their respective uses:

1. java Tool:
   • -cp or -classpath: Specifies the classpath, which is a list of directories and JAR files where Java looks for class files.
   • -version: Displays the version of the Java Runtime Environment (JRE).
   • -Xmx: Sets the maximum Java heap size.
   • -Xms: Sets the initial Java heap size.
   • -Dproperty=value: Sets a system property.
   • -jar: Executes a program stored in a JAR file.
   • -ea or -enableassertions: Enables assertions.
   • -da or -disableassertions: Disables assertions.
   • -server: Selects the "server" VM for better performance.
   • -client: Selects the "client" VM for better startup time.
   • -verbose:class: Prints information about each class loaded.
   • -verbose:gc: Prints information about garbage collection.
   • -XX:HeapDumpPath: Specifies a file for heap dump.
   • -XX:OnOutOfMemoryError: Runs a script when an OutOfMemoryError occurs.
   Use: The java tool is used to run Java applications and provides options to control runtime behavior, memory allocation, and various system properties.
2. javac Tool:
   • -cp or -classpath: Specifies the classpath for finding class files.
   • -d: Specifies the destination directory for generated class files.
   • -g: Generates all debugging information.
   • -source: Specifies the version of source code to use.
   • -target: Generates class files that target a specified version of the JVM.
   • -nowarn: Suppresses compilation warnings.
   • -verbose: Provides verbose output during compilation.
   • -sourcepath: Specifies the location of source files.
   Use: The javac tool is the Java compiler used to compile Java source code files into bytecode class files. It provides options for controlling the compilation process and generating class files.
3. javadoc Tool:
   • -d: Specifies the destination directory for generated documentation.
   • -sourcepath: Specifies the location of source files.
   • -classpath: Specifies the classpath for finding referenced classes.
   • -subpackages: Documents all classes in the specified package and its subpackages.
   • -author: Includes author information in generated documentation.
   • -version: Includes version information in generated documentation.
   • -use: Specifies external documentation file(s).
   • -link: Specifies URLs for external links.
   • -stylesheetfile: Specifies a custom stylesheet file for formatting documentation.
   Use: The javadoc tool generates HTML documentation from Java source code files with embedded Javadoc comments. It provides options for controlling the documentation generation process, including specifying output locations, source paths, and customizing the documentation appearance.

These are just some of the commonly used options for these JDK tools. Each tool provides a wide range of options to control their behavior, and you can use these options to fine-tune and customize your Java development and documentation processes.