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jdeps - The Java Class Dependency Analyzer
This chapter provides tutorial notes on 'jdeps', the Java Class Dependency Analyzer. Topics include 'jdeps' command options; showing package or class level dependencies of a given class or jar file; showing package or class level reverse dependencies of a given Java module.
2022-10-01, ∼543🔥, 0💬

jinfo - VM Option Value Checker
This section provides a tutorial example on how to use the 'jinfo' tool to view the current value of a given HotSpot VM option.
2022-10-01, ∼542🔥, 0💬

Partial Date and Time Objects and Classes
This section provides a tutorial example on how to use Date-Time classes that represents partial date and time objects like java.time.LocalDate, java.time.LocalDate, etc.
2022-10-01, ∼539🔥, 0💬

Listing Instance Counts of All Classes
This section provides a tutorial example on how to list object instance counts of all loaded classes in a Java heap dump file through the 'jhat' Web server.
2022-10-01, ∼539🔥, 0💬

"jpackage -t msi" - Package for Windows
This section provides a tutorial example on how to use 'jpackage -t msi' command to generate a binary distribution package from Java application JAR file in *.msi format for Windows computers. But 'jpackage' requires a third-party tool, WiX, to work.
2022-10-01, ∼539🔥, 0💬

Converting Secret Keys to and from Byte Arrays
This section provides a quick introduction of the SecretKeySpec class and the KeySpec interface. They can be used to convert secret keys into byte arrays to store them in external files.
2024-02-03, ∼536🔥, 1💬

Compiling Hello.java - My First Java Program
This section provides a tutorial example on how to compile a Java program using the 'javac' tool without any options.
2023-07-26, ∼533🔥, 1💬

"jpackage -t pkg" - Package for macOS
This section provides a tutorial example on how to use 'jpackage -t pkg' command to generate a binary distribution package from Java application JAR file in *.pkg format for macOS computers.
2023-03-08, ∼530🔥, 1💬

💬 2023-03-08 Andy: For me, this produced a pkg that installs a app image on my MAC, but the installed program cannot be executed, because it says t...

JDK - Java Development Kit
This chapter provides tutorial notes on installing JDK on your own Windows system to run Java programs. Topics include downloading and installing JDK; compiling and executing Java programs, installing JDK documentation.
2022-10-01, ∼530🔥, 0💬

"import" Statements Processed by "javac"
This section provides a tutorial example on how the 'javac' tool process two types of 'import' statements differently when loading required class types.
2022-10-01, ∼528🔥, 0💬

Listing Java Tools in JDK
This section provides a list of Java tools included in the Oracle JDK package for Windows systems.
2022-10-01, ∼524🔥, 0💬

jconsole - Connecting to a Local JMX Agent
This section provides a tutorial example on how to run 'jconsole' to connect to a JMX agent running on a local machine, and how to monitor the running Java application by reading head memory usage, CPU usage, number of threads and classes.
2022-10-01, ∼522🔥, 0💬

What Is "keystore"?
This section provides a quick introduction of 'keystore' - a database file used to store private keys and public key certificates. 'keystore' file can be managed by the KeyStore class or the 'keytool' command.
2022-10-01, ∼515🔥, 0💬

Literal Formats for Integers
This section describes 4 literal formats for integer values: decimal, hex, octal and binary integer literals. The default integer literal data type is 'int'.
2022-10-01, ∼514🔥, 0💬

Class and Interface Hierarchy
This section describes Java class and interface hierarchical relationships to support object inheritance: superclass-subclass relation, superinteface-subinterface relation, and interface-class relation.
2022-10-01, ∼514🔥, 0💬

Synchronization Technique and Synchronized Code Blocks
This chapter provides tutorial notes and tutorial examples on synchronization technique and synchronized code blocks. Topics include what is the synchronization technique; synchronized class methods, instance methods, statement blocks; synchronized banking application sample.
2015-11-13, ∼514🔥, 1💬

Testing JDK Installation
This section describes how to compile and run Java programs to test JDK installation on Windows system.
2022-10-01, ∼513🔥, 0💬

jlink - The JRE Linker
This chapter provides tutorial notes on 'jlink', the JRE Linker. Topics include introduction of jlink; building JRE with java.base only; building application JRE; generating application launching scripts.
2022-10-01, ∼511🔥, 0💬

javac - Using CP1252 to Process Source File
This section provides a tutorial example showing how 'javac' processing Java source code files with CP1252 encoding.
2022-10-01, ∼510🔥, 0💬

Running EncodingSampler.java with UTF-8, UTF-16, UTF16-BE
This section provides a tutorial example on how to run the character encoding sample program with UTF-8, UTF-16, and UTF16-BE encodings, which are all Unicode character set encodings.
2022-10-01, ∼506🔥, 0💬

Integer Data Types
This section describes value ranges and storage space sizes of integer data types: byte, short, int, long and char.
2016-02-15, ∼502🔥, 1💬

💬 2016-02-15 Merit Campus: You can clear many of your doubts regarding data types in Core Java through Merit Campus, visit: http://java.meritcampus.com/cor...

Archived: Downloading and Installing Java 8
This section describes how to download and install Java 8 (Java Standard Edition Development Kit 1.8) on Windows.
2022-10-01, ∼496🔥, 0💬

JAB (Java Access Bridge) for Windows
This chapter provides tutorial notes on JAB (Java Access Bridge) tools. Topics include introduction of JAB (Java Access Bridge); using 'jabswitch' to enable JABB; using 'jaccesswalker' to view GUI component tree; using 'jaccessinspector' to examine GUI accessible information.
2022-10-01, ∼490🔥, 0💬

"jaccessinspector" - Accessible Information Examiner
This section provides a tutorial example on how to use 'jaccessinspector' to examine accessible information of objects that trigger events in a Java GUI application on Windows computers.
2025-09-24, ∼486🔥, 2💬

💬 2025-09-24 Herong: Dolly, what is your operating system? and what is your Java version?

💬 2025-09-23 Dolly: what to do if jaccessinspector application always crashed

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