[NETBEANS-449] Compilation error for build from source (Ubuntu 17.10, Java 8, Ant 10.2)

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 9.0
• Labels: pull-request-available

Environment

Ubuntu 17.10, Java 8u151, Ant 1.10.2

• Assignee: Jan Lahoda
• Reporter: Kevin
• Created: 06/Mar/18 22:31
• Updated: 03/Nov/19 20:11
• Resolved: 12/Apr/18 05:32

Description

I failed to build incubator Apache NetBeans from source. I cloned the master branch, ran ant v10.2 with Java 8u151 installed. It broke on a Java compilation error:

bootstrap:
     [echo] Bootstrapping NetBeans-specific Ant extensions...
    [javac] Compiling 53 source files to /media/kevvurs/ExtraDrive1/incubator-netbeans/nbbuild/build/antclasses
    [javac] /media/kevvurs/ExtraDrive1/incubator-netbeans/nbbuild/antsrc/org/netbeans/nbbuild/LayerIndex.java:344: error: class ZipArray inherits unrelated defaults for stream() from types ResourceCollection and Collection
    [javac]     private static final class ZipArray extends ArrayList<Resource>
    [javac]                          ^
    [javac] 1 error

ZipArray extended ArrayList and implemented ResourceCollection, so Java broke on the multiple stream() definitions. I am guessing Java 9 would get around this, but the documentation says it will work with Java 8.

Issue Links

• links to: GitHub Pull Request #444