Issue is when setting the content of a SwingNode, the old content is not garbage collected owing to the fact JLightweightFrame is never being released by SwingNodeDisposer
The SwingNodeDisposer holds an hard pointer to the JLightweightFrame that prevents its collection Modified `SwingNode.setContentImpl` function to use a WeakReference to properly release the memory. ------------- Commit messages: - 8262518: SwingNode.setContent does not close previous content, resulting in memory leak - 8262518: SwingNode.setContent does not close previous content, resulting in memory leak Changes: https://git.openjdk.org/jfx/pull/1219/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1219&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8262518 Stats: 14 lines in 2 files changed: 5 ins; 1 del; 8 mod Patch: https://git.openjdk.org/jfx/pull/1219.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/1219/head:pull/1219 PR: https://git.openjdk.org/jfx/pull/1219
