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ppa:ubuntu-toolchain-r/test sudo Apt-get Update sudo apt-get install gcc-4.8 g++-4.8 sudo update-alternatives--remove-all gcc sudo Update-alternatives--remove-all g++ sudo update-alternatives--install/usr/bin/gcc gcc/usr/bin/gcc-4.8 sudo update-alternatives--install/usr/bin/g++ g++/usr/bin/g++-4.8 sudo update-

The version of GCC used in Ubuntu is different from the release version, and when compiling the Android system different versions are recommended to compile with different gcc, so can you change the system's GCC to suit the needs of the Android build environment? The answer is yes.Let's see what the GCC and g++ are for our system.Gcc-vThe information you can get is as followsGCC version 4.4.6 (Ubuntu/linaro 4.4.6-11ubuntu2)What if we want to use gcc4.5? First see if there is gcc4.5 installed,ls/

1. First install the custom JDK directory into alternatives[Email PROTECTED]:~/SRCANDROID/SRC4. 4. 4_r1$ sudo update-alternatives--install/usr/bin/java java/home/seven/documents/android/jdk1. 6 700[Email protected]:~/srcandroid/src4.4.4_r1$ sudo update-alternatives--install/usr/bin/javac javac/home/seven/ Documents/android/jdk1.6.0_45/bin/javac 700[Email protecte

The next day of contact with Hadoop, the configuration of Hadoop to the environment also took two days, the process of their own configuration is written here, I hope to help you!I will use the text to share all the resources here, click to download, do not need to find a!Among them is "the Hadoop Technology Insider" This book, the first chapter describes this configuration process, but not detailed ~---------------Installing the JDK-------------------------------1.Download jdk1.6.0_452. Unzip t

Error: ISO C + + does not allow the initialization of a very static member within a classstarting today to learn C + + primer, when involved in the sales_item.h header file, there are some problems (and c++11 new features related), the current compiler version is gcc/g++ 4.6.3, so need to upgrade. You can use the PPA to upgrade to 4.8.1, as follows:sudo add-apt-repository ppa:ubuntu-toolchain-r/testsudo apt-get update; sudo apt-get install gcc-4.8 g++-4.8sudo update-

Source/etc/profile Configure Default JDK version: sudo update-alternatives--install/usr/bin/java Java/usr/local/java8/jdk1.8.0_73/bin/java 300sudo update-alternatives--install/usr/bin/javac Javac/usr/local/java8/jdk1.8.0_73/bin/javac 300sudo update-alternatives--install/usr/bin/jar Jar/usr/local/java8/jdk1.8.0_73/bin/jar 300sudo update-

Install the JDK with CentOS today and find that when the installation is complete, enter the Java command to verify if the installation is successful.Usage:gij [OPTION] ... CLASS [ARGS] ...To invoke Class.main, orGij-jar [OPTION] ... Jarfile [ARGS] ...To execute a JAR fileTry ' gij--help ' for more information.Feel very strange, how to appear gij, in the online search error occurred because the Linux system is not the default point to the JDK version of the installation, so, to view the next[ema

Permissions: $chmod777 Jdk-6u45-linux-x64.bin Perform installation: $sudo./jdk-6u33-linux-x64.bin $sudo ./jdk-6u33-linux-x64.bin3.3 Configuring the JDK Open environment variable file $sudo gedit/etc/enviroment Add the following environment variables to save and exit: 1 path=$PATH: $JAVA _home/bin2 classpath= ".: $JAVA _home/bin"3 java_home= "/usr/ Lib/jvm/jdk1.6.0_45 " Association JDK6 $sudoUpdate-

Install the JDK with CentOS today and find that when the installation is complete, enter the Java command to verify if the installation is successful.Usage:gij [OPTION] ... CLASS [ARGS] ...To invoke Class.main, orGij-jar [OPTION] ... Jarfile [ARGS] ...To execute a JAR fileTry ' gij--help ' for more information.Feel very strange, how to appear gij, in the online search error occurred because the Linux system is not the default point to the JDK version of the installation, so, to view the next[ema

-alternatives -- install/usr/bin/Java/usr/lib/JVM/jdk1.6.0 _ 38/bin/Java 300Sudo Update-alternatives -- install/usr/bin/javac/usr/lib/JVM/jdk1.6.0 _ 38/bin/javac 300Sudo Update-alternatives -- install/usr/bin/Jar/usr/lib/JVM/jdk1.6.0 _ 38/bin/jar 300 After the three commands are executed, resources on the Internet can be automatically switched to jdk1.6.0 _ 38, b

Step 1: Download jdk-7-linux-i586.tar.gz [Plain] View plaincopy Http://download.oracle.com/otn-pub/java/jdk/7/jdk-7-linux-i586.tar.gz wget-C (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 [Plain] View plaincopy 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 [Plain] View plaincopy Vim ~ /. Bashrc Add:[Plain]

=/usr/local/java/jdk1.7.0 _ 09PATH = $ PATH: $ HOME/bin: $ JAVA_HOME/binJRE_HOME =/usr/local/java/jre1.7.0 _ 09PATH = $ PATH: $ HOME/bin: $ JRE_HOME/binExport JAVA_HOMEExport JRE_HOMEExport PATH Save and close gedit, and then enter the following command: Sudo update-alternatives -- install "/usr/bin/java" "java" "/usr/local/java/jre1.7.0 _ 09/bin/java" 1Sudo update-alternatives -- install "/usr/bin/java

Configure JDK 1.8.0 _ 25 in Ubuntu 14.04 and switch the version. Configure jdk 1.8.0 _ 25 in Ubuntu 14.04. You can switch the version to jdk. Decompress: Sudo mkdir/usr/lib/jvm Sudo tar zxvf/home/user name/Downloads/jdk-8u25-linux-i586.tar.gz-C/usr/lib/jvm Modify the environment variable: // The environment variable is not configured after the test. After the configuration, the following command cannot be used to switch the version. Test method: Hadoop-2.6.0 with jdk1.8.25 compilation will be wr

the Alternatives command to install JAVA After the installation package is decompressed, you can use the alternatives command for installation. The alternatives command encapsulates chkconfig. cd /opt/jdk1.8.0_72/alternatives --install /usr/bin/java java /opt/jdk1.8.0_72/bin/java 2alternatives --config javaThere are 3

to the logon page and enter your username and password registered on the Oracle website. Step 3: Install Oracle JDK(1) create a java directory$ Sudo mkdir-p/usr/local/javaCopy the jdk-6u45-linux-x64.bin you downloaded to the/usr/local/java directory$ Cd/usr/local/java$ Sudo cp/home/bkjia/Downloads/jdk-6u45-linux-x64.bin. (2) decompress the binfile$ Sudo chmod + x jdk-6u45-linux-x64.bin$ Sudo./jdk-6u45-linux-x64.bin$ Sudo rm-rf jdk-6u45-linux-x64.bin Step 4: configure the JDK(1) Configure JAVA_H

-dev:i386 3. downgrade the gcc/g ++ version (the default gcc/g ++ version of Ubuntu is a little high) # sudo apt-get install gcc-4.4 # sudo apt-get install g++-4.4 #sudo update-alternatives –install /usr/bin/gcc gcc /usr/bin/gcc-4.4 40 #sudo update-alternatives –install /usr/bin/g++ g++ /usr/bin/g++-4.4 40 #sudo update-alternatives –install /usr/bin/gcc gcc /usr/

Install Oracle JDK 14.04 on Ubuntu 1.8 LTS (1) download JDK Http://www.oracle.com/technetwork/cn/java/javase/downloads/index.html (2) Extract (3) create a jvm File (4) Move to/usr/lib/jvm (Note: If there is no jvm file, running this statement will automatically create the jvm file, but it will only put all the files in jdk1.8.0 _ 25 into the jvm, instead of placing the jdk1.8.0 _ 25 and its files in the jvm file, the two are different) (5) set JDK Environment Variables (Also in ~ /. Bashrc

you have not logged on, the system will go to the logon page and enter your username and password registered on the Oracle website.Step 3: Install Oracle JDK(1) create the java directory $ sudo mkdir-p/usr/local/java copy the jdk-6u45-linux-x64.bin you downloaded to the/usr/local/java directory $ cd/usr/local/java $ sudo cp/ home/dennis/Downloads/jdk-6u45-linux-x64.bin.(2) unzip the binfile $ sudo chmod + x jdk-6u45-linux-x64.bin $ sudo./jdk-6u45-linux-x64.bin $ sudo rm-rf jdk-6u45-linux-x64.bi

Step 1: Download the JDK of tar.gz, Run the sudo tar zxvf./jdk's name.tar.gz-C and the path you want to specify. Step 2: Modify JDK Permissions Sudo chmod 766-r your JDK path Step 3: Press CTRL + ALT + T to open the terminal Step 4: Enter sudo gedit/etc/profile, the system will pop up the profile text file, and add the following code at the end # Set Java environmentExport java_home = Your JDK pathExport jre_home =$ {java_home}/JREExport classpath =. :$ {java_home}/lib: 4 {jre_home}/libExport pa

1. Check the version and installed version Dev03 @ dev03 :~ $ Ls/usr/bin/GCC * /Usr/bin/GCC/usr/bin/gcc-4.5/usr/bin/gcc-4.6 If some versions are missing, install them directly: Sudo apt-Get install gcc-4.5 g ++-4.5 Sudo apt-Get install gcc-4.4 g ++-4.4 2. view the G ++ GCC version. G ++-V gcc-V 3. When the environment requires a specific version of GCC g ++, select sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.5 40sudo update