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System Properties and Runtime Object Methods
This chapter provides tutorial notes and tutorial examples on system properties and the Runtime object. Topics include listing all system properties, setting your own properties, accessing the Runtime object, checking free memory, executing OS commands.
2022-10-01, ∼484🔥, 0💬

Creating Class Type Objects
This section describes how class type objects can be created using the 'new' operator and special methods.
2022-06-24, ∼484🔥, 1💬

💬 2022-06-24 waryam: ok

JDK Documentation Installation
This section describes how to install JDK Documentation on your own machine.
2022-10-01, ∼480🔥, 0💬

What Is an Enum Type
This section describes 'enum' types, which are defined by 'enum' declaration statements. An 'enum' type is actually a special kind of class type.
2022-10-01, ∼480🔥, 0💬

Charset.encode() - Method to Encode Characters
This section provides a tutorial example on how to encode characters with a given encoding using different encoding methods provided by JDK: Charset.encode(), CharsetEncoder.encode(), String.getBytes(), OutputStreamWriter.write().
2022-10-01, ∼479🔥, 0💬

DOMParser.java - Parsing XML Files with DOM
This section provides a tutorial example on how to write an XML file parser, DOMParser.java, with the org.w3c.dom.Document class included in JDK.
2022-10-01, ∼479🔥, 0💬

Download and Install JDK 20 on macOS
This section describes how to download and install JDK 20 on a macOS computer.
2022-10-01, ∼479🔥, 0💬

Install JDK with "rpm" Command
This section provides a tutorial on how to download and install JDK packages from pkgs.org repository using 'rpm' command on CentOS systems.
2022-10-01, ∼479🔥, 0💬

java.lang.Enum Super Type
This section provides a tutorial on how to verify the enum type hierarchy supported by the java.lang.Enum Super Type.
2022-10-01, ∼479🔥, 0💬

What Is Date-Time API
This section provides introductions on what the Date-Time API introduced in Java 8 (JDK 1.8). The Date-Time API is replacing the java.util.Date class and the java.util.GregorianCalendar class.
2022-10-01, ∼477🔥, 0💬

ThreadGroup Class and "system" ThreadGroup Tree
This chapter provides tutorial notes and tutorial examples on the ThreadGroup class and the 'system' ThreadGroup tree. Topics include main methods of the ThreadGroup class, displaying the 'system' ThreadGroup tree, adding threads and thread groups, testing the reported JDK 1.3 bug - memory leak of u...
2022-10-01, ∼477🔥, 0💬

Locale Sensitive Operations
This section provides a tutorial example on how to convert date objects to strings in different locales using java.util.SimpleDateFormat class.
2022-10-01, ∼476🔥, 0💬

What Is a Socket?
This section describes what is a socket - An concept represents one end-point of a two-way communication link between two programs running on the Internet network.
2022-10-01, ∼476🔥, 0💬

Lambda Expressions and Method References
This chapter provides tutorial notes on lambda expressions and method references introduced in Java 8. Topics include lambda expression syntax; method reference syntax; single abstract method interface (functional interface); using lambda expressions in stream pipeline operations.
2022-10-01, ∼476🔥, 0💬

java.time.ZonedDateTime - Calendar and Timezone
This section describes the java.time.ZonedDateTime class that represents a moment of time expressed in 3 components, ISO 8601 date, time of day, and timezone.
2022-10-01, ∼475🔥, 0💬

Reading and Writing Certificates in DER and RFC Formats
This section provides test results of using my JcaCertificateTest.java program to read in certificates in DER and RFC formats. Those certificates are generated with the 'keytool' command tool.
2022-10-01, ∼474🔥, 0💬

Application Data Shared by Multiple Threads
This section provides a tutorial example on how to share application data by multiple threads. Data sharing allows multiple threads to work together on a single large task.
2022-10-01, ∼474🔥, 0💬

Datagram Network Communication
This chapter provides tutorial notes and example codes on datagram network communication. Topics include introduction to datagram communication; creating a datagram server and listening for incoming packets; creating a datagram client and sends packets to a server; sample programs: DatagramServer.ja...
2022-10-01, ∼473🔥, 0💬

HttpsClient.java Failed with JDK 1.8
This section provides a tutorial example showing HttpsClient.java failed to complete the communication at the application level. But it works with SSL debug mode turned on.
2022-10-01, ∼473🔥, 0💬

Enum Constant Inherited Methods
This section provides a tutorial on how to invoke static and instance method inherited from the generic base class of java.lang.Enum.
2022-10-01, ∼473🔥, 0💬

"assert" Statements
This section describes 'assert' statement, which allows you to make an assertion in the execution flow. 'assert' statements are executed only when -ea' JVM option is specified.
2022-10-01, ∼473🔥, 0💬

"jrunscript" - Run JavaScript Interactively
This section provides a tutorial example on how to use 'jrunscript' to run JavaScript code interactively.
2022-10-01, ∼472🔥, 0💬

Type Casting Example Program
This section provides a tutorial example on how to use up casting and down casting explicitly and implicitly.
2022-10-01, ∼472🔥, 0💬

What Are Bits and Bytes
This section describes bits and bytes as data storage units and as data types.
2022-10-01, ∼471🔥, 0💬

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