<i18n dev> RFR: 8282602: Refactor java/awt classes javadoc to use @throws instead of @exception

[Prasanta Sadhukhan]

Prevailing JDK coding practices use "@throws" rather than "@exception".
Refactor existing java/awt classes javadoc to use @throws

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Commit messages:
 - Fix
 - Fix

Changes: https://git.openjdk.java.net/jdk/pull/7675/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7675&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8282602
  Stats: 350 lines in 73 files changed: 0 ins; 0 del; 350 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7675.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7675/head:pull/7675

PR: https://git.openjdk.java.net/jdk/pull/7675