[GitHub] zeppelin pull request #658: Switch to Java 8

[doanduyhai <gi...@git.apache.org>]

GitHub user doanduyhai reopened a pull request:

    https://github.com/apache/zeppelin/pull/658

    Switch to Java 8

    ### What is this PR for?
    
    Java 7 is now officially no longer supported by Oracle and Java 8 has been released quite a while. We should take the opportunity to switch to Java 8.
    ### What type of PR is it?
    
    [Improvement]
    ### Todos
    - [ ] - Task
    ### Is there a relevant Jira issue?
    
    **[ZEPPELIN-621](https://issues.apache.org/jira/browse/ZEPPELIN-621)**
    ### How should this be tested?
    - Hava Java 8 installed locally
    - Build Zeppelin with `mvn clean -Pxxxx -DskipTests`
    - Create some notes with spark/angular/shell interpreter and test some basic use-case
    
    This PR is low risk because Java 8 is backward-compatible with Java 7 source code.
    ### Screenshots (if appropriate)
    
    N/A
    ### Questions:
    - Does the licenses files need update? --> No
    - Is there breaking changes for older versions? --> No
    - Does this needs documentation? --> No


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/doanduyhai/incubator-zeppelin Java8

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/zeppelin/pull/658.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #658
    
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