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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, 233👍, 0💬

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, 232👍, 0💬

javac - Java Compilation Command and Options
This section describes what are the commonly used command line options for the Java compiler - 'javac' tool.
2022-10-01, 232👍, 0💬

Garbage Collection and Unused Objects
This section describes what is garbage collection and what is an unused object.
2022-10-01, 227👍, 0💬

jinfo - Changing HotSpot VM Option
This section provides a tutorial example on how to set a new value to a HotSpot VM option on a given JVM process using the 'jinfo' tool.
2022-10-01, 226👍, 0💬

jimage - The JIMAGE File Tool
This chapter provides tutorial notes on 'jimage', the JIMAGE File Tool. Topics include introduction of JIMAGE file format; 'jimage' command options; viewing and extracting JIMAGE file with 'jimage'; summary of Java file types and related tools.
2022-10-01, 226👍, 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, 225👍, 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, 224👍, 0💬

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.
2022-10-01, 224👍, 0💬

java.time.Instant Usage Examples
This section provides a tutorial example on how to use the java.time.Instant class to capture the current time, and to retrieve Epoch-Second value and Nanosecond-of-Second value. The system clock on Windows only supports millisecond resolution.
2022-10-01, 221👍, 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, 220👍, 0💬

Archived: Downloading and Installing JDK 1.5
This section describes how to download and install Java SE (JDK) 1.5.0 on a Windows XP system.
2022-10-01, 220👍, 0💬

jmc - JMX Console via MBean Server
This section provides a tutorial example on how to use 'jmc' JMX Console via MBean Server. The dashboard shows live meters of Used Java Heap Memory, JVM CPU Usage, and Live Set + Fragmentation.
2022-10-01, 219👍, 0💬

"jdeprscan jar_file" - Deprecated API of JAR File
This section provides a tutorial example on how to use 'jdeprscan' command to scan for deprecated APIs of a given JAR file.
2022-10-01, 219👍, 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, 216👍, 0💬

jconsole - Connecting to a Remote JMX Agent
This section provides a tutorial example on how to run 'jconsole' to connect to a JMX agent running on a remote machine, and how to see memory usage detail information.
2022-10-01, 216👍, 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, 215👍, 0💬

"jdeps --inverse --require ..." - Reverse Dependencies
This section provides a tutorial example on how to use 'jdeps --inverse' command to show reverse dependencies of a given Java module.
2022-10-01, 214👍, 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, 213👍, 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.
2022-10-01, 206👍, 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, 206👍, 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, 205👍, 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, 200👍, 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, 200👍, 0💬

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