JDBC Tutorials - Herong's Tutorial Examples
This JDBC tutorial book is a collection of notes and sample codes written by the author while he was learning JDBC technology himself. It can be used as a tutorial guide for beginners. Topics include Java, Database, JDBC, Driver, ODBC, Connection, DataSource, SQL, ResultSet, Metadata, Derby, MySQL, ... 2020-03-07, 7128👍, 10💬
Downloading and Installing JDK 1.7.0 on Windows
This section provides a tutorial example on how to download and install JDK 1.7.0 (Java SE 7) on a Windows XP system. A simple Java program was entered, compiled, and executed with the new JDK installation. 2020-04-28, 6049👍, 6💬
What Is JVM Specfication
This section describes what is JVM Specfication. 2020-01-11, 171👍, 1💬
-Xss JVM Option for Stack Size
This section describes the -Xss option to specify JVM stack size. Changing stack size can help to estimate frame size. The frame size is 32 bytes for a simple method call. 2019-08-24, 5607👍, 1💬
PC Register and Native Method Stack
This section describes PC Registers and Native Method Stacks, which are reserved one per thread. Normal Java applications do not have any significant impact on PC Registers and Native Method Stacks. 2019-08-14, 1666👍, 3💬
JVM "-verbose:class" Option
This section provides a tutorial example on how to the '-verbose:class' option on the 'java' command to see when and where classes are loaded into the JVM. 2019-07-19, 180👍, 1💬
Java HotSpot VM - JVM by Oracle/Sun
This section provides a tutorial example on how to download and install JDK 1.8.0 (Java SE 8), which contains the HotSpot 1.8 JVM, on a Windows XP system. A simple Java program was entered, compiled, and executed with the new JDK installation. 2018-09-01, 1083👍, 2💬
"-XX:+PrintGCDetails" - Garbage Collection Logging
This section describes HotSpot JVM options to generate garbage collection logging messages. It also describes log message format to help us understand what the JVM is telling us. 2018-04-23, 348👍, 1💬
Java Exception: "java.lang.OutOfMemoryError: Java heap space"
This section provides a tutorial example on how JVM expands the Heap space to allocate more objects and leads to the 'java.lang.OutOfMemoryError: Java heap space' Java exception, if it is not allowed to expand any more. 2017-08-10, 333👍, 1💬
Current Time in Milliseconds and Nanoseconds
This section provides a tutorial example on how to obtain the current time in milliseconds and nanoseconds using currentTimeMillis() and nanoTime() methods. 2017-08-09, 140👍, 1💬
Accessing System Environment Variables
This section provides a tutorial example on how to access environment variables defined in the operating system using the System.getenv() method. 2017-01-14, 519👍, 2💬
Sun's JVM - Java HotSpot VM
This chapter provides tutorial notes and example codes on Sun Java HotSpot VM. Topics include running Java HotSpot VM in client and server modes; checking memory usage with the Runtime class. 2016-01-26, 951👍, 1💬
Garbage Collection Tests
This chapter provides tutorial notes and example codes on garbage collection. Topics include garbage collection test program - GCTest2.java; comparisons between HotSpot 1.7.0, HotSpot 1.6.0 and JRockit R28.2.7. 2015-08-16, 209👍, 1💬
Table of Contents - Index
This free book is a collection of notes and sample codes written by the author while he was learning JVM himself. Topics include JVM (Java Virtual Machine), HotSpot, JRockit, GC (Garbage Collection), Memory, Stack overflow, CDS (Class Data Sharing), Runtime, Reflection. 2015-07-18, 239👍, 0💬
This section provides a tutorial example on how to a simple Java Swing program. SwingHello.java is m...
This section describes how to download Apache (HTTP Server) 2.2.25 binary distribution for Windows s...
This section describes 'adb push' and 'adb pull' commands, which allows you to copy files to and fro...
This section provides a tutorial example on how to see the list of trusted root CA (PKI Authorities)...
This chapter provides tutorial notes on CLOB (Character Large Object) data types, TEXT, with SQL Ser...