Ubuntu14.04LTS install Java8 and Eclipse4.4

Ubuntu

Full illustration of Ubuntu 14.04 LTS installation of Java 8 and Eclipse 4.4:

1. Install JAVA8 link: http://www.linuxidc.com/Linux/2014-11/109216.htm

2. Download eclipsehttp: // www.eclipse.org/downloads/

Just started with Eclipse IDE for Java EE Developers, decompress the package, and double-click

An error occurred.

The reason for this problem is that I am ~ /. The Java environment variable in bashrc. This file will be read when you start the terminal, but it is not global. Therefore, the jre cannot be found by double-clicking.

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Solution 1: Add the Java environment in/etc/profile

Solution 2:

Go to eclipse, create a jre folder, enter the jre folder, ln-s your JDK absolute directory/bin

After the settings are complete, double-click the settings to start successfully.

The menu is missing and the global menu is not displayed.

Solution 1: (set the Java environment to profile)

Solution 2:

Solution 3: add it to the Application menu (recommended)

Save the Ubuntu menu items in the/usr/share/applications directory.

Create an eclipse. desktop and enter the following code on the terminal:

Sudo gedit/usr/share/applications/eclipse. desktop

Add the following content to the file, save and exit.

Exec =/home/user/eclipse (Note: This is the running program eclipse under the decompressed directory of eclipse)

Icon =/home/user/eclipse/icon. xpm (Note: This is the Icon in the decompressed directory of eclipse)

Restart eclipse and the global menu appears.

3. if you double-click it, but if you start it with a terminal, some warning and error messages will appear.

Java HotSpot (TM) 64-Bit Server VM warning: ignoring option MaxPermSize = 256 m; suport was removed in 8.0 (this is a warning because Java 8 has canceled the permanent generation, therefore, the setting of MaxPermSize in eclipse configuration in Java 8 will be ignored. If you cancel the MaxPermSize in ini, this warning will not appear)

Org. eclipse. m2e. logback. configuration: The org. eclipse. m2e. logback. configuration bundle was activated before the state location was initialized.

Will retry after the state location is initialized.

Org. eclipse. m2e. logback. configuration: Logback config file:/home/user/workspace/. metadata/. plugins/org. eclipse. m2e. logback. configuration/logback.1.5.0.20140606-0033.xml

Org. eclipse. m2e. logback. configuration: Initializing logback

Java. lang. ClassCastException: org. eclipse. osgi. internal. framework. equinoxations $1 cannot be cast to java. lang. String

At org. eclipse. m2e. logback. configuration. LogHelper. logJavaProperties (LogHelper. java: 26)

......

At java. util. TimerThread. mainLoop (Timer. java: 555)

At java. util. TimerThread. run (Timer. java: 505)

This error should be a BUG of the maven plug-in attached to eclispe j2ee.

Https://bugs.eclipse.org/bugs/show_bug.cgi? Id = 445687

Https://bugs.eclipse.org/bugs/show_bug.cgi? Id = 440696

I have not found a good solution yet, but I don't want to use the software with error reports during development. I decided to try the pure version of eclipse.

For more details, refer to the highlights on the next page.: Http://www.linuxidc.com/Linux/2014-11/109217p2.htm