A simple change listener is used in JTabbedPane to lazily fill with components - this is done by adding the components to JTabbedPane using the `setComponentAt` in the change listener.
Previously, if the change listener was placed before calling `addTab()` , the previous visible component was overlapping with the current visible component. To fix it, the visibility of previous component is set to false before the current component's visibility is set to true in `setComponentAt`. Following are the before and after fix screenshots-  ------------- Commit messages: - added summary and removed commented lines - JTabbedPane setComponentAt changes Changes: https://git.openjdk.org/jdk/pull/9681/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9681&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8259687 Stats: 112 lines in 2 files changed: 112 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/9681.diff Fetch: git fetch https://git.openjdk.org/jdk pull/9681/head:pull/9681 PR: https://git.openjdk.org/jdk/pull/9681
