Ubuntu Builds Java development environment

Ubuntu builds Java development environment to install Java online

sudo add-apt-repository ppa:webupd8team/javasudo apt-get updatesudo apt-get install oracle-java8-installersudo apt-get install oracle-java8-set-default

Run again later

java -version

If you have an output similar to the following, you're done! If not, continue to Google or Baidu Bar.

"1.8.0_25"1.8.06425.25-b02, mixed mode)

Installing Java Offline

First you have to download the installation package here.

Suppose you download the jdk-8u25-linux-x64.tar.gz now and extract the folder jdk1.8.0_25.

Execute the following command to move Java to the Lib directory.

sudo mkdir -p /usr/lib/jvm/jdk1.8.0_25/sudo mv jdk1.8.0_25/* /usr/lib/jvm/jdk1.8.0_25/

Next, use the update-alternatives command to configure Java.

sudo"/usr/bin/java""java""/usr/lib/jvm/jdk1.8.0_25/bin/java"1sudo"/usr/bin/javac""javac""/usr/lib/jvm/jdk1.8.0_25/bin/javac"1sudo"/usr/bin/javaws""javaws""/usr/lib/jvm/jdk1.8.0_25/bin/javaws"1

The execution results are as follows.

update-alternatives: using /usr/lib/jvm/jdk1.8.0in 自动模式update-alternatives: using /usr/lib/jvm/jdk1.8.0in 自动模式update-alternatives: using /usr/lib/jvm/jdk1.8.0in 自动模式

Finally, perform the java-version and check the installation.

"1.8.0_25"1.8.06425.25-b02, mixed mode)

Install Eclipse

Note that eclipse wants to download JEE, not standard, remember.

First download eclipse.

Then unzip to /opt/eclipse . Eclipse is now open, but the icon cannot be opened after it has been locked to the launcher.

/usr/share/applicationsCreate a new file under the directory eclipse.desktop . The contents are as follows.

[Desktop Entry]Type=ApplicationName=eclipseComment=Eclipse IDEExec=/opt/eclipse/eclipseIcon=/opt/eclipse/icon.xpmCategories=DevelopmentTerminal=false

This file is then given executable permissions.

sudo chmod +x eclipse.desktop

At this point, you can start eclipse directly in the launcher.

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Ubuntu Builds Java development environment