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jvisualvm (Java VisualVM) - JVM Visual Tool
This chapter provides tutorial notes on the JVM visual tool, Java VisualVM. Topics include launching Java VisualVM, connecting to local JVM processes; monitoring CPU and heap usage; monitoring thread statuses; taking thread dumps and heap dumps; viewing heap dump and object contents; connecting to r...
2024-03-13, 921🔥, 2💬

💬 2021-01-12 vinod: thanks

💬 2017-10-25 haibing: thanks

💬 2017-06-16 marth: powerful tool

Archived: Download and Install JDK 13 on macOS
This section provides a tutorial on how to download and install JDK (Java Development Kit) 13 from Oracle website on macOS systems.
2024-03-11, 120🔥, 0💬

HTTPS Server with Expired Certificate
This section provides a tutorial example showing the behavior of HTTPS server and client programs that use an expired server certificate.
2024-03-11, 116🔥, 0💬

Archived: Downloading and Installing JDK 13 on Mac
This section describes how to download and install JDK 13 on a Mac computer
2024-02-22, 123🔥, 0💬

Downloading and Installing JDK on Linux
This section provides a tutorial example on how to download and install JDK on Linux systems. The best way to install JDK on CentOS system is to the 'yum' package management tool.
2024-02-22, 110🔥, 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.
2024-02-03, 400🔥, 1💬

serialver - serialVersionUID Generator
This chapter provides provides a tutorial example on how to use 'serialver' command to generate a unique 'serialVersionUID' value for any given serializable Java class.
2024-01-18, 2395🔥, 8💬

💬 2023-02-22 Youngjo Kim: HEllo My name is BYUIOUDHFODIUHOFIHODIHF

💬 2022-06-27 Ravi Shrestha: Generating serial version id

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 \uXXXX Unicode sequences before giving it to the Java compiler.
2024-01-10, 4281🔥, 30💬

💬 2024-01-10 ez: Bonjour

💬 2023-07-25 sasa: -~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[];Ì= (ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+([ ].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ó+ ó]+(!''+'...

💬 2023-03-29 asafsas: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2022-11-30 dhidhdi: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2022-08-06 đè: ó=-~É,Ë=É<<É,þ=Ë+~[]

(More comments ...)

Checking Variable Values in a Debugging Session
This section provides a tutorial example on how to check values of local variables in a debugging session.
2023-12-28, 138🔥, 1💬

💬 2023-12-28 Lolipop: /* * nonsence */

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 \uXXXX Unicode code sequences, converting \uXXXX sequences back to native encodings.
2023-11-24, 6205🔥, 65💬

💬 2023-11-24 xddd: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2022-10-03 tag: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2022-06-09 hupo: (É+ó)+(ó+ó)+'\'

💬 2022-05-29 aaa: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2022-03-13 Q: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

(More comments ...)

Archived: Downloading and Installing J2SE 1.5.0 on Windows
This section provides tutorial example on how to download and install J2SE (JDK - Java Development Kit) 1.5.0.
2023-11-13, 1906🔥, 1💬

💬 2023-11-13 Hi: Hi

jar - JAR File Tool Command and Options
This section describes the 'jar' command to manage JAR files. 'jar' command syntax and options are provided.
2023-08-08, 1264🔥, 2💬

💬 2023-08-08 Herong: Lina, can you run "ls -l $SNPEFF/snpEff.jar" to see if the JAR file is accessible?

💬 2023-08-07 Lina: I install the snpEff package using conda install in a conda environment and I am unable to use it. It says unable to access the ...

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.
2023-07-26, 436🔥, 1💬

jwebserver - Java Web Server
This chapter provides provides a tutorial example on how to use 'jwebserver' command to launch the Java Simple Web Server.
2023-05-20, 100🔥, 0💬

Installing JDK 15 on macOS
This section provides a tutorial example on how to download and install JDK 15, which includes some nice Java tools, on a macOS system.
2023-05-20, 104🔥, 0💬

Creating Module JAR File
This section provides a tutorial example on how to use 'jar --create' command to create a module JAR file to store all class files of a Java module.
2023-04-24, 1551🔥, 2💬

💬 2023-04-24 Jeff: Append my comments. It actually worked. Didn't realize C in -C is a capital letter and there's a dot in the end.

💬 2023-04-24 Jeff: when I tried --describe-module option, command prompt said no module descriptor found. Derived automatic module. Also, the --lis...

JIMAGE - Java Image File Format
This section describes the Java image, JIMAGE, a special file format used to store class and resource files of multiple Java modules to support custom JRE.
2023-03-18, 1814🔥, 2💬

💬 2023-03-18 -: nice

"jpackage -t pkg" - Package for macOS
This section provides a tutorial example on how to use 'jpackage -t pkg' command to generate a binary distribution package from Java application JAR file in *.pkg format for macOS computers.
2023-03-08, 387🔥, 1💬

💬 2023-03-08 Andy: For me, this produced a pkg that installs a app image on my MAC, but the installed program cannot be executed, because it says t...

Download and Install JDK 17 on Windows
This section describes how to download and install JDK 12 on a Windows system.
2023-02-27, 69319🔥, 51💬

💬 2023-02-27 frank: grazie

💬 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

(More comments ...)

Archived: 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.
2023-02-07, 5012🔥, 5💬

💬 2023-02-07 Hakizimana issa: hello how is 0

💬 2021-08-04 Bob: can i play hypixel on this

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

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.
2022-12-07, 3768🔥, 8💬

💬 2021-04-15 omg: nice

💬 2019-07-24 Vivek: yo sup

"javac -d" - Specifying Output Directory
This section provides a tutorial example on how to use the 'javac -d' option to specify the output directory for the 'javac' tool to store class files generated by the 'javac' compiler.
2022-11-26, 8306🔥, 4💬

💬 2022-11-26 Ivan Nascimento: Thank you so much, just what I was looking for.

💬 2022-03-22 Hedi: Thanks

💬 2022-01-14 Robert: Thanks

"native2ascii -encoding" - UTF-8 to uXXXX Conversion
This section provides a tutorial example on how to convert UTF-8 character strings to \uXXXX Unicode code sequences with the 'native2ascii -encoding' command.
2022-10-01, 2042🔥, 4💬

💬 2022-10-01 DEMO: DEMO

💬 2020-05-08 دد: سلام

💬 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: &lt;script>alert("hii")&lt;/ script>

"jar --update" - Updating Class Files in JAR
This section provides a tutorial example on how to 'jar --update' to update class files in JAR files.
2022-10-01, 3179🔥, 0💬

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