openjdk

We know that openjdk may be installed in Ubuntu in advance. However, I am used to Oraclejdk. ## Lt; uninstall openjdk gt; ### Terminalcommand: sudoapt-getpurgeopenjdk/openjdk *; sudoapt-getclean/autoclean; we should delete openjdk from the system. # Lt; download and install O We know that

Previously, the jdk of ubuntu was installed with the apt-get install command. The default installation is openjdk, and the path is/usr/lib/jvm /. If you need to switch or upgrade the java version, you can use update-alternatives. Of course, you can uninstall and reinstall it, or you can install it by setting environment variables. This section describes how to install update-alternatives.Since the development of Linux, there have been a lot of availab

Preface The materials I read now are compiled by openjdk7, and openjdk8 seems to have been compiled by openjdk7 in a large way. make sanity Will prompt that the sanity rule cannot be found, and then the compilation process is basically direct ./configuremake all The official readme statement is clear. The following process is recorded:Download Code hg clone http://hg.openjdk.java.net/jdk8u/jdk8u jdk8ucd jdk8u bash ./get_source.sh Then download the code and enter the code directory: cd jdk8uInsta

Step 1: Check whether the built-in JDK in Linux is installed (uninstall the JDK installed in centos) The installed centos comes with openjdk and uses the Java-version command. The following information is displayed: Java versionOpenjdk Runtime Environment (build 1.6.0-b09)Openjdk 64-bit server VM (build 1.6.0-b09, mixed mode) It is best to uninstall openjdk

Install JAVA in CentOS 7 and in centos 7 Step 1: Check whether the built-in JDK of Linux is installed The installed CentOS comes with OpenJdk and uses the java-version command. The following information is displayed: Java version "1.6.0"OpenJDK Runtime Environment (build 1.6.0-b09)OpenJDK 64-Bit Server VM (build 1.6.0-b09, mixed mode) It is best to uninstall

. bashrc file: 　　　　　　 Set JAVA_HOME =/usr/share/jdk1.7.0 _ 25 Export JAVA_HOME Set PATH = $ JAVA_HOME/bin: $ PATH Export PATH Set CLASSPATH =.: $ JAVA_HOME/lib/dt. jar: $ JAVA_HOME/lib/tools. jar Export CLASSPATH • Log on again Use commands Source ~ /. Bashrc Make it take effect 3. directly set variables in shell I am not in favor of using this method. If you change the shell, your settings will be invalid. Therefore, this method is only for temporary use and will be re-set later, which is tr

Install JDK, Tomcat, and MySQL basic software in Linux. 1. Install JDK After Centos6.5 is installed, OpenJDK is installed by default for Base Server. You must first Delete OpenJDK. 1.1 view the previous jdk Check whether openjdk has been installed before. If you are not a root user, you need to switch to the root user (su-root) Command: rpm-qa | grep java It is s

First step: Check if the Linux-brought JDK is installed (uninstall CentOS installed 1.4)The installed CentOS will bring openjdk, with the command java-version, will have the following information:Java Version "1.6.0"OpenJDK Runtime Environment (build 1.6.0-b09)OpenJDK 64-bit Server VM (build 1.6.0-b09, Mixed mode)It is best to uninstall the

1) Find JavaYum-y List java*650) this.width=650; "src=" Https://s1.51cto.com/wyfs02/M02/92/81/wKioL1kANx_Rpud2AAGXsaVG3Mg650.png "title=" Qq20170426135520.png "alt=" Wkiol1kanx_rpud2aagxsavg3mg650.png "/>2) switch to root to install first[email protected] desktop]$ Su-Password:[Email protected] ~]# yum install java-1.8.0-openjdk*-y3) Check the installation status[Email protected] ~]# java-versionOPENJDK Version "1.8.0_131"

First step: Check if the Linux-brought JDK is installedThe installed CentOS will bring openjdk, with the command java-version, will have the following information:Java Version "1.6.0"OpenJDK Runtime Environment (build 1.6.0-b09)OpenJDK 64-bit Server VM (build 1.6.0-b09, Mixed mode)It is best to uninstall the OPENJDK be

1. First look at the OPENJDK installation package$ RPM-QA |grep javaTzdata-java-2013b-1.el6.noarchJava-1.6.0-openjdk-1.6.0.0-1.61.1.11.11.el6_4.x86_64Java-1.7.0-openjdk-1.7.0.19-2.3.9.1.el6_4.x86_642. Check the OPENJDK version$ java-versionJava Version "1.7.0_19"OpenJDK Runt

. It is worth noting that Eclipse Luna needs openjdk 7 operating environment, I use Ubuntu 12.04, the system comes with OPENJDK 6, need to install, and then change the Eclipse startup parameters ( If you have not modified the system's default Java Runtime Environment, add the following in the Eclipse.ini file in the Eclipse installation directory:-vm/usr/lib/jvm/java-1.7.0-

JDK6.0).JDK6.0 the root directory of the JDK (eg. C:\Java\jdk1.6.0_21) has a src.zip directory after the installation is complete. This directory can be extracted to another directory (eg. D:\amigo\study\ Technical essay \201405). Src.zip does not contain all JDK source code, such as the child package under Sun is not present in src.zip (eg. the sun.security package and its child packages used in this article are not included).To download these sub-packages, you need to download the source code

View Original JDK[Email protected] java]# Rpm-qa | grep JDKJava-1.7.0-openjdk-headless-1.7.0.91-2.6.2.3.el7.x86_64Java-1.8.0-openjdk-headless-1.8.0.65-3.b17.el7.x86_64Java-1.7.0-openjdk-1.7.0.91-2.6.2.3.el7.x86_64Java-1.8.0-openjdk-1.8.0.65-3.b17.el7.x86_64Uninstalling the original JDK[Email protected] java]# rpm-e--no

1. First look at the OPENJDK installation package$ RPM-QA |grep javaTzdata-java-2013b-1.el6.noarchJava-1.6.0-openjdk-1.6.0.0-1.61.1.11.11.el6_4.x86_64Java-1.7.0-openjdk-1.7.0.19-2.3.9.1.el6_4.x86_642. Check the OPENJDK version number$ java-versionJava Version "1.7.0_19"OpenJDK