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Reading RSA Private and Public Key Files
This section provides a tutorial example on running the test program JcaKeyFactoryTest.java to generate, write, read and convert RSA private and public keys.
2022-10-01, ∼570🔥, 0💬

java.time.OffsetDateTime - Calendar and UTC Offset
This section describes the java.time.OffsetDateTime class that represents a local time in a specific UTC offset expressed in 3 components, ISO 8601 date, time of day and UTC offset.
2022-10-01, ∼566🔥, 0💬

"java -jar" - Specifying Executable JAR File
This section provides a tutorial example on how to use the '-jar' option for the 'java' tool to specify an executable JAR file.
2022-10-01, ∼566🔥, 0💬

Calculating Memory Usage of an Array
This section provides a tutorial example on how to calculate memory usage of a large array.
2022-10-01, ∼564🔥, 0💬

jdeprscan - The Java Deprecated API Scanner
This chapter provides tutorial notes on 'jdeprscan', the Java Deprecated API Scanner. Topics include 'jdeprscan' command options; scanning for deprecated APIs of a given class or jar file; displaying all deprecated APIs of a specific JDK release.
2022-10-01, ∼560🔥, 0💬

JceSecretKeyTest.java - Secret Key Test Program
This section provides a quick tutorial example on how to write a sample program to generate a secret key for Blowfish, DES, or HmacMD5 encryption, save the secret key to a file, and read it back.
2022-10-01, ∼558🔥, 0💬

jcmd - The JVM Diagnostic Tool
This chapter provides tutorial notes on 'jcmd', the JVM Diagnostic Tool. Topics include list of local JVMs; list of diagnostic commands; running VM.* commands; running GC.* commands; generating heap dump and thread dump.
2022-10-01, ∼551🔥, 0💬

Message Digest Algorithm Implementations in JDK
This chapter provides tutorial notes and example codes on message digest algorithm implementation. Topics include JCA (Java Cryptography Architecture) package; java.security.MessageDigest class; MD5 and SHA message digest program; message digest output comparison.
2015-10-06, ∼548🔥, 2💬

Garbage Collection and Unused Objects
This section describes what is garbage collection and what is an unused object.
2022-10-01, ∼543🔥, 0💬

Generic Classes and Parameterized Types
This chapter provides tutorial notes and example codes on generic classes and parameterized types. Topics include what is a generic class; what is a type parameter; using parameterized types and subtyping; using wildcard parameterized types and subtyping.
2022-10-01, ∼537🔥, 0💬

Adding Threads and Thread Groups
This section provides a tutorial example on how to add threads and thread groups to the 'system' ThreadGroup tree.
2022-10-01, ∼535🔥, 0💬

JVM Troubleshooting Tools in JDK
This section provides quick descriptions on JVM troubleshooting tools included in JDK.
2022-10-01, ∼534🔥, 0💬

"jcmd 0 Thread.print" - Generating Thread Dump
This section provides a tutorial example on how to use the 'jcmd 0 Thread.print' command to generate a thread dump of a given JVM.
2022-10-01, ∼534🔥, 0💬

java.util.Calendar - The Abstract Calendar Class
This section provides a tutorial example on how to use calendar related classes: java.util.Calendar, java.util.GregorianCalendar, java.util.TimeZone, and java.util.SimpleTimeZone.
2022-10-01, ∼533🔥, 0💬

javap - The Java Class File Disassembler
This chapter provides tutorial notes on 'javap', the Java class file disassembler. Topics include list of 'javap' command options, showing public variables and methods, showing private variables and methods, disassembling bytecode to JVM assembler code.
2022-10-01, ∼533🔥, 0💬

Archived: Downloading and Installing JDK 8
This section describes how to download and install Java SE 8 (JDK 7) on a Windows system.
2022-10-01, ∼533🔥, 0💬

com.sun.management.jmxremote - JMX Agent for Local Connection
This section provides a tutorial example on how to turn on the out-of-the-box JMX agent on Sun JVM for monitoring tool 'jconsole' to connect on the local machine.
2022-10-01, ∼532🔥, 0💬

java.util.DateFormat - Formatting Date Objects to Strings
This section provides a tutorial example on how to use java.util.DateFormat and java.util.SimpleDateFormat classes to convert or format data objects into text strings in a specific calendar in various locales.
2022-10-01, ∼529🔥, 0💬

"jaccesswalker" - GUI Component Tree Browser
This section provides a tutorial example on how to use 'jabswitch' and 'jaccesswalker' to display the GUI component tree a Java GUI application on Windows computers.
2022-10-01, ∼529🔥, 0💬

Character Set Encoding Maps - Unicode UTF-8
This section provides a tutorial example of analyzing and printing character set encoding maps for encoding: UTF-8, the most popular encoding for Unicode character set.
2022-10-01, ∼526🔥, 0💬

jpackage - What Is It
This section describes what is 'jpackage' - a command line tool that allows you to create a binary distribution package of your Java application for a specific computer platform in a specific format.
2022-10-01, ∼526🔥, 0💬

What Is Deadlock
This section provides a tutorial example on how to demonstrate a deadlock condition with two Java threads.
2022-10-01, ∼526🔥, 0💬

Archived: JDK 1.3 Bug - Memory Leak With Unstarted Threads
This section describes a reported bug for JDK 1.3 that unstarted thread objects cause memory leak.
2022-10-01, ∼526🔥, 0💬

The SSL (Secure Socket Layer) Protocol
This chapter provides tutorial notes and example codes on the SSL (Secure Socket Layer) protocol. Topics include introduction of the SSL (Secure Socket Layer) protocol; JSSE (Java Secure Socket Extension) package; test program to create default SSL sockets; testing the javas.net.ssl.SSLContext class...
2022-10-01, ∼524🔥, 0💬

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