RFR: 8150303: Rewrite test/tools/javac/Paths/Diagnostics.sh

[Guoxiong Li]

Hi all,

This patch rewrites Diagnostics.sh to java code by using ToolBox API.
And I have a question: What does the `elts` mean in the following comments? Is it `elements`?
I think that a meaningful name should be used.

// Warn for missing elts in user-specified paths
// No warning for missing elts in "system" paths

Thank you for taking the time to review.

Best Regards.

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Commit messages:
 - 8150303: Rewrite test/tools/javac/Paths/Diagnostics.sh

Changes: https://git.openjdk.java.net/jdk/pull/1959/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1959&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8150303
  Stats: 520 lines in 2 files changed: 310 ins; 210 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1959.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1959/head:pull/1959

PR: https://git.openjdk.java.net/jdk/pull/1959