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Running EncodingSampler.java with GB18030
This section provides a tutorial example on how to run the character encoding sample program with GB18030, which is the newest Chinese character set encoding.
2022-10-01, ∼530🔥, 0💬

JDK (Java Development Kit)
This chapter provides tutorial JDK (Java Development Kit). Topics include introduction of JDK; downloading and installing JDK on Windows, macOS and CentOS systems; creating and running a simple Java program.
2022-10-01, ∼527🔥, 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, ∼526🔥, 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, ∼525🔥, 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, ∼516🔥, 0💬

Garbage Collection and Unused Objects
This section describes what is garbage collection and what is an unused object.
2022-10-01, ∼509🔥, 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, ∼508🔥, 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, ∼506🔥, 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, ∼505🔥, 0💬

What Is Deadlock
This section provides a tutorial example on how to demonstrate a deadlock condition with two Java threads.
2022-10-01, ∼504🔥, 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, ∼501🔥, 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, ∼500🔥, 2💬

"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, ∼499🔥, 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, ∼494🔥, 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, ∼489🔥, 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, ∼488🔥, 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, ∼487🔥, 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, ∼485🔥, 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, ∼481🔥, 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, ∼480🔥, 0💬

java.util.NumberFormat - Formatting Numeric Values to Strings
This section provides a tutorial example on how to use java.util.NumberFormat and java.util.DecimalFormat classes to convert or format numeric values into text strings in various locales.
2022-10-01, ∼480🔥, 0💬

Monitoring Trigers on jmc JMX Console
This section provides a tutorial example on how to use JVM monitoring triggers provided by the MBean Browser on jmc JMX Console.
2022-10-01, ∼479🔥, 0💬

"jcmd 0 GC.*" - Running GC Diagnostic Commands
This section provides a tutorial example on how to use 'jcmd 0 GC.*' commands to get heap information, run GC or generate heap dump file, of a given JVM.
2022-10-01, ∼479🔥, 0💬

JVM Troubleshooting Tools in JDK
This section provides quick descriptions on JVM troubleshooting tools included in JDK.
2022-10-01, ∼478🔥, 0💬

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