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installer because of a firewall or some other reason, you can interrupt the operation. then download the corresponding JDK tar.gz package, put in: /var/cache/oracle-jdk7-installer (JDK7) /var/cache/oracle-jdk8-installer (JDK8) Below, and then install the installer once. Installer will default to use the tar.gz package you downloaded 3. Set system default JDK JDk7 sudo update-java-alternatives-s java-7-oracle JDK8 sudo update-java-

1: Installed through the PPA (source) mode. 2: Download the installation package through the official website. 1th is recommended here because the JDK upgrade can be easily obtained by Apt-get upgrade method. install using the ppa/source method Add PPA sudo add-apt-repository ppa:webupd8team/java sudo apt-get update Install Oracle-java-installer Jdk7: sudo apt-get install oracle-java7-installer jdk8: sudo apt-get install Oracle-java8-installer The installer will prompt you to agree to Oracle

individual)If you cause installer to download slowly due to firewalls or other reasons, you can interrupt the operation. Then download the tar.gz package for the corresponding JDK, and put it in:/var/cache/oracle-jdk7-installer (JDK7)/var/cache/oracle-jdk8-installer (JDK8)Below, and then install the installer once. Installer will use the TAR.GZ package you downloaded by default3. Set the system default JDKJDk7sudo update-java-alternatives-s java-7-or

Create a Python development environment in Ubuntu13.10: Step 1 install JDK (to install ECLIPSEIDE) decompress the installation package and set JDK. The update-alternatives -- install option feature adds a new set of system command links. Tar-zxvfjdk-7u45-linux-x64.tar.gzsudomkdir-p/usr/lib/jvmsudomv./j Build a Python development environment in Ubuntu 13.10: Step 1 install JDK (to install eclipse ide) Decompress the installation package and set JDK. Th

/controlpanelIcon =/usr/lib/Java/JRE/plugin/desktop/sun_java.pngTerminal = 0Type = ApplicationCategories = application; settings; X-sun-supported; X-red-hat-base; In this way, you can start the Java console through the menu... 3. Use alternatives to run all Java commands, man, and plugin.Finally, create a link for the command under JDK bin, install the plug-in for Mozilla, and create a shell file with the following content: #! /Bin/bash

thirdpartylicensereadme.txt include lib release [[email protected] ~] $ Sudo Rm-RF/usr/lib/JDK/jdk1.8.0 _ 11/# Delete [email protected] ~] $ Ls/usr/lib/jdkbin javafx-src.zip man THIRDPARTYLICENSEREADME-JAVAFX.txtCOPYRIGHT JRE readme.html thirdpartylicensereadme.txt dB lib releaseinclude license src.zip [[email protected] ~] $ 2. Configure Environment Variables [[Email protected] ~] $ Sudo Vim/etc/profile is inserted in the last line: # Java environmentexport java_home =/usr/lib/jdkexport jre_

-- include = \ *. conf bash/etc /*/Etc/adduser. conf Similarly, using the -- exclude option, we can exclude any specific file name: Bkjia @ bkjia :~ $ Sudo grep-Ril -- exclude = \ *. conf bash/etc /*/Etc/alternatives/lzcmp/Etc/alternatives/vivaldi/Etc/alternatives/vi/Etc/alternatives/view/Etc/

+ F7 to return to the desktop.Another point is that when you configure the environment, do not leave spaces between the Environment name and the corresponding environment path, such as JAVA_HOME =/opt/jdk1.7.0 _ 45 "=" on both sides, which should be unrecognized by bash.4. Because ubuntu comes with the JVM Implementation of gij, the following information is displayed when you type "java-version" on the terminal: java version "1.6.0. This means that the JVM implementation is already available in

ubuntu16.04 python2.7 and python3.5 are installed by default. This tutorial uses python3.5The first step: Modify the default ubuntu16.04 Python2 to use Python3 by default.sudo update-alternatives--install/usr/bin/python python/usr/bin/python2 100sudo update-alternatives--install/usr/ Bin/python Python/usr/bin/python3 150Running the above code will modify ubuntu16.04 by default using Python2 to use Python3 b

reasons, you can interrupt the operation. Then download the tar.gz package for the corresponding JDK, and put it in:/var/cache/oracle-jdk7-installer (JDK7)/var/cache/oracle-jdk8-installer (JDK8)Below, and then install the installer once. Installer will use the TAR.GZ package you downloaded by default3. Set the system default JDKJDk7sudo update-java-alternatives-s java-7-oracleJDK8sudo update-java-alternatives