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one line./usr/bin/java->/etc/alternatives/javaExport PATH = $ PATH :$ {JAVA_HOME}/bin :$ {JRE_HOME}/binThen execute the following$ Sudo update-alternatives-install/usr/bin/javah/opt/jdk/bin/javah 255$ Sudo update-alternatives-install/usr/bin/javac/opt/jdk/bin/javac 255$ Sudo update-alternatives-install/usr/bin/java/op

Practical Android skills: Switch JDK under Ubuntu After Android L, we recommend that you use JDK 7 to compile the program. This is a natural development rule, just like compiling Android 1.6 4 years ago and using JDK 5. Multi-version JDK can coexist. You only need to use the update-alternatives tool to switch between them at any time. The following describes how to install openjdk and oracle jdk (cannot cope with sun) and switch the version.1. Install

VM and Utuntu InstallationVMware Installation/ubuntu InstallationVMware Environment ConfigurationInstall Vmware-tools:TAR-XF xxx.tar.gzsudo./vmware-install.pl linkRebootUbuntu Environment Configurationsudo add-apt-repository Ppa:git-core/ppasudo apt-get updatesudo apt-get upgradeInstall Ifconfig:What's the location of the Ifconfig programReference:Ubuntu releases historical versionUbuntu 14.04.5 LTS (trusty Tahr)http://cn.ubuntu.com/download/VmwareVMware Workstation 12.5.5 VMSVMware Workstation

at the end of the open file? 12345 # export Java env export java_home= /usr/local/java/jdk1 .7.0 export jre_home= /usr/local/java/jdk1 .7.0 /jre export classpath=.:%java_home% /lib/dt .jar:%java_home% /lib/tools .jar export path= $JAVA _home /bin : $JRE _home /bin : $PATH Save the exit and enter the following command to make it effective? 1 source~/.bash_profile 4. Configure the default JDK (this step can be omitted

Finally, you can upgrade your system by implementing C ++ 11 GCC4.8.1. The following steps can be performed to install GCC4.8.1, sudoadd-apt-repositoryppa: ubuntu-toolchain-r/testsudoupdate-alternatives -- remove-allgccsudoupdate-alternatives -- remove Finally, the complete implementation of C ++ 11 GCC 4.8.1. Upgrade your system. The following steps can be performed to install GCC 4.8.1 in Ubuntu 13.04, Su

downloaded cannot be installed. Original Go to the directory where you downloadedthe JRE package, and change the permissions so the file is executable. Forexample: $ CD/tmp $ Chmod A + x jre-6u25-linux-x64-rpm.bin Translation Go to the JRE directory you downloaded and change the directory permissions so that they can be authorized to other users. $ CD/tmp $ Chmod A + x jre-6u25-linux-x64-rpm.bin Original Extract and run the RPM file. For example: $ Sudo./jre-6u25-linux-x64-rpm.bin The RPM IN

openjdk. To set the JDK we installed as the default JDK version, perform the following work.Run the Code:[Plain] View plaincopy Sudo Update-alternatives -- install/usr/bin/Java/usr/lib/JVM/Java-7-sun/bin/Java 300 Sudo Update-alternatives -- install/usr/bin/javac/usr/lib/JVM/Java-7-sun/bin/javac 300 Sudo Update-alternatives -- install/usr/bin/Jar/usr/lib/JVM/

I encountered this error. I saw the solution in a Foreign Forum and successfully solved the problem. I hope to help others. Error:Build/CORE/product_config.mk: 229: Warning: adding test OTA keyHost Java: clearsilver (Out/host/common/obj/java_libraries/Clearsilver_intermediates/classes)Unrecognized option: 9999999Make: *** [out/host/common/obj/java_libraries/Clearsilver_intermediates/javalib. jar] Error 41 Cause:According to the error message, it is probably a Java Virtual Machine problem. Some p

Build the ubuntu eclipse C ++ EnvironmentInstall the java Development Environment package JDK Step 1: Download jdk-7-linux-i586.tar.gz wget -c http://download.oracle.com/otn-pub/java/jdk/7/jdk-7-linux-i586.tar.gz (Note: If the download fails, we recommend that you use thunder to download it and copy it to the Linux system .)Step 2: unzip and install sudo tar zxvf ./jdk-7-linux-i586.tar.gz -C /usr/lib/jvm cd /usr/lib/jvm sudo mv jdk1.7.0/ java-7-sun Step 3: Modify Environment Variables vim

this case, you must use the "Update-alternatives" tool provided by Debian to complete the process. Program Multiple versions are available: Sudo Update-alternatives -- display Java The system only lists gij JVM, because JDK 6 is manually decompressed and installed. Enter the following two lines: Sudo Update-alternatives -- install/usr/bin/Java/usr/local/lib/jdk

-headless* openjdk-6-jre-headless* gcj-4.5-jre-headless* openjdk-7-jre-headlessTry: sudo apt-get install First, we need to check whether there are already some java alternatives installed on the system. To do that we can useUpdate-AlternativesCommand: $ sudo update-alternatives --list javaupdate-alternatives: error: no alter