Oracle Java JDK - Revision history

Kangtain at 07:11, 11 November 2025

2025-11-11T07:11:13Z

← Older revision		Revision as of 14:11, 11 November 2025
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	===What’s New in Java 18===		===What’s New in Java 18===

	*New Oracle Cloud Infrastructure (OCI) native service to help manage Java runtimes and applications on-premises or on any cloud.		*New Oracle Cloud Infrastructure (OCI) native service to help manage Java runtimes and applications on-premises or on any cloud.
	*Sets UTF-8 as the default charset of the standard Java APIs		*Sets UTF-8 as the default charset of the standard Java APIs
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	===2. Install the .deb package===		===2. Install the .deb package===
	*Next, press <code>Ctrl+Alt+T</code> on keyboard to open terminal. When it opens, run the command below to install the package you just downloaded:		*Next, press <code>Ctrl+Alt+T</code> on keyboard to open terminal. When it opens, run the command below to install the package you just downloaded:
	~~<syntaxhighlight lang="shell">~~
	cd ~/Downloads && sudo apt install ./jdk-18_linux-x64_bin.deb		cd ~/Downloads && sudo apt install ./jdk-18_linux-x64_bin.deb
	~~</syntaxhighlight>~~

	===3. Set JDK 18 as default===		===3. Set JDK 18 as default===
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	sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk-18/bin/java 1		sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk-18/bin/java 1

	~~</syntaxhighlight><syntaxhighlight lang="shell">~~		sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk-18/bin/javac 1
	sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk-18/bin/javac 1
	~~</syntaxhighlight><syntaxhighlight lang="shell">~~
	~~sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk-18/bin/jar 1~~
	~~</syntaxhighlight>Similarly, add links for other executable files (e.g., jarsigner, jlink, javadoc) as need.~~

	~~'''b.''' Next, run the commands below one by one, and type number to select Java JDK 18 as default.<syntaxhighlight lang="shell">~~		sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk-18/bin/jar 1
	sudo update-alternatives --~~config java~~

	~~</syntaxhighlight><syntaxhighlight lang="shell">~~		Similarly, add links for other executable files (e.g., jarsigner, jlink, javadoc) as need.
	~~sudo update-alternatives --config javac~~

	~~</syntaxhighlight><syntaxhighlight lang="shell">~~		'''b.''' Next, run the commands below one by one, and type number to select Java JDK 18 as default.
	sudo update-alternatives --config jar
	~~</syntaxhighlight>~~When done, verify by running command in terminal:<syntaxhighlight lang="shell">		sudo update-alternatives --config java

			sudo update-alternatives --config javac

			sudo update-alternatives --config jar

			When done, verify by running command in terminal:<syntaxhighlight lang="shell">
	java -version		java -version

	~~</syntaxhighlight><syntaxhighlight lang="shell">~~		javac -version
	javac -version
	~~</syntaxhighlight>~~

	===4. Set JAVA_HOME===		===4. Set JAVA_HOME===

	'''Option 1''' Set <code>JAVA_HOME</code> for current console, that will work until you close it:~~<syntaxhighlight lang="shell" line="1">~~		'''Option 1''' Set <code>JAVA_HOME</code> for current console, that will work until you close it:
	export JAVA_HOME=/usr/lib/jvm/jdk-18
	setenv JAVA_HOME=/usr/lib/jvm/jdk-18		export JAVA_HOME=/usr/lib/jvm/jdk-18
	~~</syntaxhighlight>~~'''Option 2''' To make it permanent, create and edit config file via command:~~<syntaxhighlight lang="shell">~~		setenv JAVA_HOME=/usr/lib/jvm/jdk-18
	sudo gedit /etc/profile.d/jdk.sh
	~~</syntaxhighlight>~~then add following lines:~~<syntaxhighlight lang="shell" line="1">~~		'''Option 2''' To make it permanent, create and edit config file via command:
	export J2SDKDIR=/usr/lib/jvm/jdk-18
	export J2REDIR=/usr/lib/jvm/jdk-18		sudo gedit /etc/profile.d/jdk.sh
	export PATH=$PATH:/usr/lib/jvm/jdk-18/bin:/usr/lib/jvm/jdk-18/db/bin
	export JAVA_HOME=/usr/lib/jvm/jdk-18		then add following lines:
	export DERBY_HOME=/usr/lib/jvm/jdk-18/db
	~~</syntaxhighlight>~~And create anther one for C shell:~~<syntaxhighlight lang="shell">~~		export J2SDKDIR=/usr/lib/jvm/jdk-18
	sudo gedit /etc/profile.d/jdk.csh		export J2REDIR=/usr/lib/jvm/jdk-18
	~~</syntaxhighlight>~~add following lines and save it:~~<syntaxhighlight lang="shell" line="1">~~		export PATH=$PATH:/usr/lib/jvm/jdk-18/bin:/usr/lib/jvm/jdk-18/db/bin
	setenv J2SDKDIR /usr/lib/jvm/jdk-18		export JAVA_HOME=/usr/lib/jvm/jdk-18
	setenv J2REDIR /usr/lib/jvm/jdk-18		export DERBY_HOME=/usr/lib/jvm/jdk-18/db
	setenv PATH ${PATH}:/usr/lib/jvm/jdk-18/bin:/usr/lib/jvm/jdk-18/db/bin
	setenv JAVA_HOME /usr/lib/jvm/jdk-18		And create anther one for C shell:
	setenv DERBY_HOME /usr/lib/jvm/jdk-18/db
	~~</syntaxhighlight>~~Finally, change the permissions via command, and it should take place at the next boot.~~<syntaxhighlight lang="shell">~~		sudo gedit /etc/profile.d/jdk.csh
	sudo chmod +x /etc/profile.d/jdk.csh /etc/profile.d/jdk.sh
	~~</syntaxhighlight>~~		add following lines and save it:

			setenv J2SDKDIR /usr/lib/jvm/jdk-18
			setenv J2REDIR /usr/lib/jvm/jdk-18
			setenv PATH ${PATH}:/usr/lib/jvm/jdk-18/bin:/usr/lib/jvm/jdk-18/db/bin
			setenv JAVA_HOME /usr/lib/jvm/jdk-18
			setenv DERBY_HOME /usr/lib/jvm/jdk-18/db

			Finally, change the permissions via command, and it should take place at the next boot.

			sudo chmod +x /etc/profile.d/jdk.csh /etc/profile.d/jdk.sh

	==Source==		==Source==

Kangtain: Kangtain moved page Software/Oracle Java JDK to Oracle Java JDK over redirect

2022-11-19T15:04:57Z

Kangtain moved page Software/Oracle Java JDK to Oracle Java JDK over redirect

← Older revision	Revision as of 22:04, 19 November 2022
(No difference)

Kangtain: /* Source */

2022-11-18T23:35:28Z

Source

← Older revision		Revision as of 06:35, 19 November 2022
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	[[Category:Linux]]		[[Category:Linux]]
	[[Category:Ubuntu]]		[[Category:Ubuntu]]
	~~{{DISPLAYTITLE:Oracle Java JDK}}~~

Kangtain at 14:00, 25 September 2022

2022-09-25T14:00:55Z

← Older revision		Revision as of 21:00, 25 September 2022
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	It installs the language files into <code>/usr/lib/jvm/jdk-18/</code> directory. To set it as default, do the following 2 steps one by one.		It installs the language files into <code>/usr/lib/jvm/jdk-18/</code> directory. To set it as default, do the following 2 steps one by one.

	'''a.''' Create symbolic links for the executable files:<syntaxhighlight lang="shell~~" line="1~~">		'''a.''' Create symbolic links for the executable files:<syntaxhighlight lang="shell">
	sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk-18/bin/java 1		sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk-18/bin/java 1

			</syntaxhighlight><syntaxhighlight lang="shell">
	sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk-18/bin/javac 1		sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk-18/bin/javac 1
			</syntaxhighlight><syntaxhighlight lang="shell">
	sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk-18/bin/jar 1		sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk-18/bin/jar 1
	</syntaxhighlight>Similarly, add links for other executable files (e.g., jarsigner, jlink, javadoc) as need.		</syntaxhighlight>Similarly, add links for other executable files (e.g., jarsigner, jlink, javadoc) as need.

	'''b.''' Next, run the commands below one by one, and type number to select Java JDK 18 as default.<syntaxhighlight lang="shell~~" line="1~~">		'''b.''' Next, run the commands below one by one, and type number to select Java JDK 18 as default.<syntaxhighlight lang="shell">
	sudo update-alternatives --config java		sudo update-alternatives --config java

			</syntaxhighlight><syntaxhighlight lang="shell">
	sudo update-alternatives --config javac		sudo update-alternatives --config javac

			</syntaxhighlight><syntaxhighlight lang="shell">
	sudo update-alternatives --config jar		sudo update-alternatives --config jar
	</syntaxhighlight>When done, verify by running command in terminal:<syntaxhighlight lang="shell~~" line="1~~">		</syntaxhighlight>When done, verify by running command in terminal:<syntaxhighlight lang="shell">
	java -version		java -version

			</syntaxhighlight><syntaxhighlight lang="shell">
	javac -version		javac -version
	</syntaxhighlight>		</syntaxhighlight>

Kangtain: /* Source */

2022-09-11T12:49:10Z

Source

← Older revision		Revision as of 19:49, 11 September 2022
Line 75:		Line 75:
	[[Category:Linux]]		[[Category:Linux]]
	[[Category:Ubuntu]]		[[Category:Ubuntu]]
			{{DISPLAYTITLE:Oracle Java JDK}}

Kangtain: Kangtain moved page Oracle Java JDK to Software/Oracle Java JDK

2022-09-11T12:48:48Z

Kangtain moved page Oracle Java JDK to Software/Oracle Java JDK

← Older revision	Revision as of 19:48, 11 September 2022
(No difference)

Kangtain: /* Install JDK 18 in Ubuntu */

2022-08-27T02:03:18Z

Install JDK 18 in Ubuntu

← Older revision		Revision as of 09:03, 27 August 2022
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	*Foreign Function and Memory API (Second Incubator)		*Foreign Function and Memory API (Second Incubator)
	*Pattern Matching for Switch (Second Preview)		*Pattern Matching for Switch (Second Preview)


	==Install JDK 18 in Ubuntu==		==Install JDK 18 in Ubuntu==
	This Ubuntu PPA maintains installer script for automatically installing Java. It however does not update for the new Java 18 release.		This Ubuntu PPA maintains installer script for automatically installing Java. It however does not update for the new Java 18 release.
Line 24:		Line 22:
	===2. Install the .deb package===		===2. Install the .deb package===
	*Next, press <code>Ctrl+Alt+T</code> on keyboard to open terminal. When it opens, run the command below to install the package you just downloaded:		*Next, press <code>Ctrl+Alt+T</code> on keyboard to open terminal. When it opens, run the command below to install the package you just downloaded:
			<syntaxhighlight lang="shell">
	cd ~/Downloads && sudo apt install ./jdk-18_linux-x64_bin.deb		cd ~/Downloads && sudo apt install ./jdk-18_linux-x64_bin.deb
			</syntaxhighlight>

	===3. Set JDK 18 as default===		===3. Set JDK 18 as default===
	It installs the language files into <code>/usr/lib/jvm/jdk-18/</code> directory. To set it as default, do the following 2 steps one by one.		It installs the language files into <code>/usr/lib/jvm/jdk-18/</code> directory. To set it as default, do the following 2 steps one by one.

	'''a.''' Create symbolic links for the executable files:		'''a.''' Create symbolic links for the executable files:<syntaxhighlight lang="shell" line="1">
			sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk-18/bin/java 1
			sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk-18/bin/javac 1
			sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk-18/bin/jar 1
			</syntaxhighlight>Similarly, add links for other executable files (e.g., jarsigner, jlink, javadoc) as need.

	~~sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk-18/bin/java 1~~		'''b.''' Next, run the commands below one by one, and type number to select Java JDK 18 as default.<syntaxhighlight lang="shell" line="1">
			sudo update-alternatives --config java
	~~sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk-18/bin/javac 1~~		sudo update-alternatives --config javac
			sudo update-alternatives --config jar
	~~sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk-18/bin/jar 1~~		</syntaxhighlight>When done, verify by running command in terminal:<syntaxhighlight lang="shell" line="1">
			java -version
	~~Similarly, add links for other executable files (e.g., jarsigner, jlink, javadoc) as need.~~		javac -version
			</syntaxhighlight>
	'''b.''' Next, run the commands below one by one, and type number to select Java JDK 18 as default.

	sudo update-alternatives --config java

	sudo update-alternatives --config javac

	sudo update-alternatives --config jar

	When done, verify by running command in terminal:

	java -version

	javac -version

	===4. Set JAVA_HOME===		===4. Set JAVA_HOME===

	'''Option 1''' Set <code>JAVA_HOME</code> for current console, that will work until you close it:		'''Option 1''' Set <code>JAVA_HOME</code> for current console, that will work until you close it:<syntaxhighlight lang="shell" line="1">
			export JAVA_HOME=/usr/lib/jvm/jdk-18
	export JAVA_HOME=/usr/lib/jvm/jdk-18		setenv JAVA_HOME=/usr/lib/jvm/jdk-18
			</syntaxhighlight>'''Option 2''' To make it permanent, create and edit config file via command:<syntaxhighlight lang="shell">
	setenv JAVA_HOME=/usr/lib/jvm/jdk-18		sudo gedit /etc/profile.d/jdk.sh
			</syntaxhighlight>then add following lines:<syntaxhighlight lang="shell" line="1">
	'''Option 2''' To make it permanent, create and edit config file via command:		export J2SDKDIR=/usr/lib/jvm/jdk-18
			export J2REDIR=/usr/lib/jvm/jdk-18
	sudo gedit /etc/profile.d/jdk.sh		export PATH=$PATH:/usr/lib/jvm/jdk-18/bin:/usr/lib/jvm/jdk-18/db/bin
			export JAVA_HOME=/usr/lib/jvm/jdk-18
	then add following lines:		export DERBY_HOME=/usr/lib/jvm/jdk-18/db
			</syntaxhighlight>And create anther one for C shell:<syntaxhighlight lang="shell">
	export J2SDKDIR=/usr/lib/jvm/jdk-18		sudo gedit /etc/profile.d/jdk.csh
	export J2REDIR=/usr/lib/jvm/jdk-18		</syntaxhighlight>add following lines and save it:<syntaxhighlight lang="shell" line="1">
	export PATH=$PATH:/usr/lib/jvm/jdk-18/bin:/usr/lib/jvm/jdk-18/db/bin		setenv J2SDKDIR /usr/lib/jvm/jdk-18
	export JAVA_HOME=/usr/lib/jvm/jdk-18		setenv J2REDIR /usr/lib/jvm/jdk-18
	export DERBY_HOME=/usr/lib/jvm/jdk-18/db		setenv PATH ${PATH}:/usr/lib/jvm/jdk-18/bin:/usr/lib/jvm/jdk-18/db/bin
			setenv JAVA_HOME /usr/lib/jvm/jdk-18
	And create anther one for C shell:		setenv DERBY_HOME /usr/lib/jvm/jdk-18/db
			</syntaxhighlight>Finally, change the permissions via command, and it should take place at the next boot.<syntaxhighlight lang="shell">
	sudo gedit /etc/profile.d/jdk.csh		sudo chmod +x /etc/profile.d/jdk.csh /etc/profile.d/jdk.sh
			</syntaxhighlight>
	add following lines and save it:

	setenv J2SDKDIR /usr/lib/jvm/jdk-18
	setenv J2REDIR /usr/lib/jvm/jdk-18
	setenv PATH ${PATH}:/usr/lib/jvm/jdk-18/bin:/usr/lib/jvm/jdk-18/db/bin
	setenv JAVA_HOME /usr/lib/jvm/jdk-18
	setenv DERBY_HOME /usr/lib/jvm/jdk-18/db

	Finally, change the permissions via command, and it should take place at the next boot.

	sudo chmod +x /etc/profile.d/jdk.csh /etc/profile.d/jdk.sh

	==Source==		==Source==

Kangtain: Created page with "Oracle announced Java 18 a few days ago. Here’s how to install the programming language in Ubuntu Linux. ===What’s New in Java 18=== New Oracle Cloud Infrastructure (OCI) native service to help manage Java runtimes and applications on-premises or on any cloud. Sets UTF-8 as the default charset of the standard Java APIs A command-line tool and API to start a minimal web server that serves static files only. Reimplement core reflection with method handles *Intern..."

2022-04-03T03:26:30Z

Created page with "Oracle announced Java 18 a few days ago. Here’s how to install the programming language in Ubuntu Linux. ===What’s New in Java 18=== *New Oracle Cloud Infrastructure (OCI) native service to help manage Java runtimes and applications on-premises or on any cloud. *Sets UTF-8 as the default charset of the standard Java APIs *A command-line tool and API to start a minimal web server that serves static files only. *Reimplement core reflection with method handles *Intern..."

New page

Oracle announced Java 18 a few days ago. Here’s how to install the programming language in Ubuntu Linux.

===What’s New in Java 18===

*New Oracle Cloud Infrastructure (OCI) native service to help manage Java runtimes and applications on-premises or on any cloud.
*Sets UTF-8 as the default charset of the standard Java APIs
*A command-line tool and API to start a minimal web server that serves static files only.
*Reimplement core reflection with method handles
*Internet-Address Resolution SPI.
*JEP Code Snippets in Java API Documentation.
*Vector API (Third Incubator)
*Foreign Function and Memory API (Second Incubator)
*Pattern Matching for Switch (Second Preview)

==Install JDK 18 in Ubuntu==
This Ubuntu PPA maintains installer script for automatically installing Java. It however does not update for the new Java 18 release.

So here’s the step by step guide shows how to install the official deb and set as default manually.

===1. Download Java package===
Firstly, go to oracle website and select [https://www.oracle.com/java/technologies/downloads/ download] the <code>.deb</code> package.

===2. Install the .deb package===
*Next, press <code>Ctrl+Alt+T</code> on keyboard to open terminal. When it opens, run the command below to install the package you just downloaded:

cd ~/Downloads && sudo apt install ./jdk-18_linux-x64_bin.deb

===3. Set JDK 18 as default===
It installs the language files into <code>/usr/lib/jvm/jdk-18/</code> directory. To set it as default, do the following 2 steps one by one.

'''a.''' Create symbolic links for the executable files:

sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk-18/bin/java 1

sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk-18/bin/javac 1

sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk-18/bin/jar 1

Similarly, add links for other executable files (e.g., jarsigner, jlink, javadoc) as need.

'''b.''' Next, run the commands below one by one, and type number to select Java JDK 18 as default.

sudo update-alternatives --config java

sudo update-alternatives --config javac

sudo update-alternatives --config jar

When done, verify by running command in terminal:

java -version

javac -version

===4. Set JAVA_HOME===

'''Option 1''' Set <code>JAVA_HOME</code> for current console, that will work until you close it:

export JAVA_HOME=/usr/lib/jvm/jdk-18

setenv JAVA_HOME=/usr/lib/jvm/jdk-18

'''Option 2''' To make it permanent, create and edit config file via command:

sudo gedit /etc/profile.d/jdk.sh

then add following lines:

export J2SDKDIR=/usr/lib/jvm/jdk-18
export J2REDIR=/usr/lib/jvm/jdk-18
export PATH=$PATH:/usr/lib/jvm/jdk-18/bin:/usr/lib/jvm/jdk-18/db/bin
export JAVA_HOME=/usr/lib/jvm/jdk-18
export DERBY_HOME=/usr/lib/jvm/jdk-18/db

And create anther one for C shell:

sudo gedit /etc/profile.d/jdk.csh

add following lines and save it:

setenv J2SDKDIR /usr/lib/jvm/jdk-18
setenv J2REDIR /usr/lib/jvm/jdk-18
setenv PATH ${PATH}:/usr/lib/jvm/jdk-18/bin:/usr/lib/jvm/jdk-18/db/bin
setenv JAVA_HOME /usr/lib/jvm/jdk-18
setenv DERBY_HOME /usr/lib/jvm/jdk-18/db

Finally, change the permissions via command, and it should take place at the next boot.

sudo chmod +x /etc/profile.d/jdk.csh /etc/profile.d/jdk.sh

==Source==
*[https://ubuntuhandbook.org/index.php/2022/03/install-jdk-18-ubuntu/ ubuntuhandbook.org]

[[Category:Software]]
[[Category:Linux]]
[[Category:Ubuntu]]