Herong's Tutorial Examples: Java

EC Cryptography Tutorials - Herong's Tutorial Examples
This EC (Elliptic Curve) cryptography tutorial book is a collection of notes and sample codes written by the author while he was learning cryptography technologies himself. Topics include rule of chord and point addition on elliptic curves; Abelian groups with additive and multiplicative notations; ... 2019-07-06, 909👍, 3💬

💬 2019-07-02 Eleftheria Drosopoulou: Hello Herong, Nice blog! I am editor at Java Code Geeks (www.javacodegeeks.com). We have the JCG program (see www.javacodegeeks....

💬 2019-01-01 Yale: Thank you!

1 2 3 4 5 > >> Sort: Rank

'native2ascii' - Native-to-ASCII Encoding Converter
This chapter provides tutorial notes on the native-to-ASCII encoding converter 'native2ascii'. Topics include 'native2ascii' command options, default encoding CP1252 used by 'javac', converting UTF-8 characters into \udddd Unicode code sequences, converting \udddd sequences back to native encodings. 2019-12-08, 4293👍, 62💬

💬 2019-12-08 123: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2019-09-17 d: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2019-09-15 asd: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2019-09-10 die: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2019-09-06 asd: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

(More comments ...)

Printable Copy - PDF Version
Information on how to obtain the PDF version of this book for printing. 2019-12-05, 2121👍, 10💬

💬 2019-12-05 Mpono: Thanks a lot

💬 2018-06-09 Herong: Sake, I think you can create a good MP3 Player with Java Swing.

💬 2018-06-02 sake: It can make advanced mp3Player whith java swing?

💬 2018-05-12 george: java

💬 2016-03-22 Herong: Keval, I will try my best. ☺

(More comments ...)

Downloading and Installing JDK 1.8.0 on Windows
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. 2019-11-19, 60321👍, 44💬

💬 2019-11-19 Jrse: Thank You!

💬 2019-09-17 hlew: thx

💬 2019-09-14 Ji: Thanks

💬 2019-09-09 asraful: best java

💬 2019-09-05 Akshay GUpta: thnx

(More comments ...)

getBit() - Retrieving a Bit from a Byte Array
This section provides a tutorial example on how to get one bit back from a byte array at a specific bit position - getBit(). 2019-11-14, 5782👍, 2💬

💬 2016-07-10 bfssd: Meaningful comments

'native2ascii' - Encoding Converter Command and Options
This section describes the native-to-ASCII encoding converter 'native2ascii' and its options. Non-ASCII characters in a Java source file must be converted into \udddd Unicode sequences before giving it to the Java compiler. 2019-11-04, 2006👍, 13💬

💬 2019-03-23 cc: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2019-03-17 jack: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2019-01-19 bb: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2018-10-24 gggg: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2018-10-20 Herong: nb, that's interesting new version of the same JavaScript code: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; ...

(More comments ...)

Downloading and Installing Java DB (Derby)
This section describes how to download and install Java DB (Derby database server) 10.11 - free for evaluation. 2019-10-22, 8096👍, 12💬

💬 2019-10-22 mahdi: very good

💬 2019-06-17 Thet: Thanks

💬 2019-01-25 denzel mana-ay: putangina mo wala akong makita

💬 2018-05-10 Anonomyus: tanks

💬 2016-02-19 Ali: Good App

(More comments ...)

Digital Signature Algorithm and Sample Program
This chapter provides tutorial notes and example codes on digital signature. Topics include algorithm and steps of signing a document; algorithm and steps of verifying a signature; digital signature generation and verification sample programs; sample signatures of SHA1withRSA and SHA1withDSA algorit... 2019-09-24, 880👍, 3💬

💬 2016-12-15 vijay: thanks

Java 8 GC Tutorials - Herong's Tutorial Examples
This book is a collection of tutorial notes and sample codes written by the author while he was learning JVM GC (Garbage Collection) processes. Topics include Java Garbage Collectors, STW (Stop-The-World), Serial Collector, Parallel Collector, Concurrent Collector, G1 Collector, GC Algorithms, Gener... 2019-09-07, 183👍, 1💬

💬 2019-09-07 Venmo: Very helpful. Thanks!

What Is Key Encoding?
This section describes private and public key encoding standards: PKCS#8 is used for encoding private keys and X.509 is used for encoding public keys. 2019-07-24, 349👍, 1💬

💬 2019-07-24 Vivek: yo sup

Downloading and Installing JDK 10
This section describes how to download and install JDK 10 on a Windows system. 2019-06-17, 52796👍, 50💬

💬 2019-06-12 sothea: Java is good

💬 2019-05-13 Myo Nyein: don't know

💬 2019-05-13 Myo Nyein: good

💬 2018-12-23 Thin Ga Ha: Very good

💬 2018-10-22 Chirag: Very good

(More comments ...)

"java --list-modules" - Listing Modules in JDK
This section provides a tutorial example on how to use 'java --list-modules' command to list all modules included in the JDK installation. 2019-06-01, 1216👍, 4💬

💬 2019-06-01 Herong: Klaus, it's probably getting them from the C:\Program Files\Java\jdk-10.0.1\lib\modules file. But you can also see a list of mod...

💬 2019-05-24 Klaus: Hi, where does this command get the modules? What is the file they lie in? I'm using CentOS

💬 2019-02-19 Herong: Felix, Thanks for pointing out the typo! It will corrected in the next update.

💬 2019-02-14 felix lee: The line "C:\herong>javac --list-modules" should be "C:\herong>java --list-modules". s/javac/java/

Downloading and Installing JDK 1.8.0 on Windows
This section provides a tutorial example on how to download and install JDK 1.8.0 (Java SE 8) on a Windows 7 system. A simple Java program was entered, compiled, and executed with the new JDK installation. 2019-05-13, 1405👍, 3💬

💬 2019-05-13 Myo Nyein: thanks

💬 2016-03-10 sudha: thanks

💬 2015-09-22 ram: no

Downloading and Installing JDK 1.8
This section describes how to download and install Java SE Development Kit (JDK) 8u45 on a Windows system. 2019-04-16, 9615👍, 6💬

💬 2019-04-16 yacine: thanks

💬 2017-10-09 Ivan: Thanks!

💬 2017-04-03 prathamesh: greaT

💬 2016-10-24 azeem: thanksa

💬 2016-01-11 hari prasath: collage use

"native2ascii -encoding" - UTF-8 to \udddd Conversion
This section provides a tutorial example on how to convert UTF-8 character strings to \udddd Unicode code sequences with the 'native2ascii -encoding' command. 2019-03-25, 482👍, 2💬

💬 2019-03-25 gg: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2019-02-18 What: <script>alert("hii")</ script>

Java GC Tutorials - Herong's Tutorial Examples
This book is a collection of tutorial notes and sample codes written by the author while he was learning JVM GC (Garbage Collection) processes. Topics include Java Garbage Collectors, STW (Stop-The-World), Serial Collector, Parallel Collector, Concurrent Collector, G1 Collector, GC Algorithms, Gener... 2019-01-01, 1256👍, 1💬

💬 2018-06-17 Jack: It's helpful!

Using java.net.HttpURLConnection to Send SOAP Messages
This section describes steps to follow if you want to use the java.net.HttpURLConnection class to send out a SOAP XML message. 2018-12-21, 35074👍, 13💬

💬 2018-12-21 Herong: RAS, Yes. That's a good example on sending a file as a SOAP attachment. I thought you were looking for example on sending files ...

💬 2018-12-18 RAS: Thanks Dr. Herong for your reply. I've gone through the link you've shared but in that way, there's no way to pass other paramet...

💬 2018-12-18 Herong: RAS, Sending (or uploading) files from a client depends what how the server want to receive them. If the server support multipar...

💬 2018-12-17 RAS: Thanks Dr. Herong for the link but I'm not able to convert it to a sample codeset. Can you help me with it?

💬 2018-12-16 Herong: RAS, if you want to send a file with HTTP POST method, check RFC 1867 - Form-based File Upload in HTML.

(More comments ...)

Outdated: Downloading and Installing JDK 1.3.1 on Windows
This section provides a tutorial example on how to download and install JDK (or J2SE) 1.3.1 on a Windows 2000 system. A simple Java program was entered, compiled, and executed with the new JDK installation. 2018-11-13, 1443👍, 3💬

💬 2017-08-07 anurag tiwari: i 'm not satisfied with your features

Literal Formats for Integers - Example
This section provides a tutorial example on how to use integer literals in 4 formats: decimal, hex, octal and binary. 2018-10-02, 109👍, 1💬

'jstat -gcutil' - Garbage Collection Statistics
This section provides a tutorial example on how to use the 'jstat -gcutil' command to get garbage collection statistics against a specified JVM process ID. 2018-09-22, 952👍, 2💬

💬 2018-09-22 Herong: Jagan, "jstat" is for Windows system only. You need to use vmstat or iostat on Oracle Solaris or Linux operating system.

💬 2018-09-22 jagan: cd /usr/java/jdk1.8.0_172/bin/j jar jarsigner java javac java-rmi.cgi jcmd jdeps jjs jps jrunscript jstat is not there.. what we...

Downloading and Installing JDK 1.6.2 on Windows
This section provides a tutorial example on how to download and install JDK 1.6.2 (Java SE 1.6 Update 2) on a Windows XP system. A simple Java program was entered, compiled, and executed with the new JDK installation. 2018-08-11, 8623👍, 15💬

💬 2018-08-11 mikw: thanks

💬 2017-02-27 sireesha: thanks

💬 2017-02-27 sireesha: Hi, I am admire to this site

💬 2017-01-29 hiiii: hi

💬 2016-10-17 Abhishek: Thanks

(More comments ...)

java.util.Locale - Localization and Internationalization
This section provides a tutorial example on how to use java.util.Locale class to verify the default locale and list all supported locales. A locale is an identification of a combination of human language and country. 2018-08-01, 6088👍, 4💬

💬 2016-12-25 Herong: jfseb, thanks for pointing out this difference.

💬 2016-12-19 jfseb: Note that java locales do not correspond in all versions to ISO 639. e.g. hebrew is now he, not iw. https://en.wikipedia.org/wik...

💬 2016-05-06 Scrijna: P.S. It's also useful for Java, iOS and Windows localization, as it supports most popular localization formats.

💬 2016-05-06 Scrijna: For Android app localization, you could try using the localization tool https://poeditor.com It's useful for collaborative trans...

Garbage Collection Logging Options
This section describes HotSpot JVM options to generate garbage collection log messages. '-XX:+PrintGCDetails' and '-XX:+PrintGCDateStamps' are two most important options. 2018-06-24, 255👍, 1💬

💬 2018-06-24 Tina: This is useful.

💬 2018-04-23 Don: Thanks for the detailed explanation!

💬 2018-06-24 Tina: This is useful.

💬 2018-04-23 Don: Thanks for the detailed explanation!

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. 2018-06-24, 261👍, 1💬

💬 2018-06-24 Maria: Cool!

💬 2017-08-10 xionghongzhi: awsome artical!!!!!! thx!!!

1 2 3 4 5 > >> Sort: Rank