In the JTable demo, if we double click on the first cell in the Favorite Number column, delete the value and click on some other cell, a java.lang.NullPointerException is getting thrown. The flaw is in the TableDemo's TableModel getColumnClass() method which queries the value of cell 0 in the target column, and returns its Class. This logic seems to be flawed - an NPE will be thrown when the value in cell 0 is null. Fix by checking for null.
------------- Commit messages: - 4819544: SwingSet2 JTable Demo throws NullPointerException - 4819544: SwingSet2 JTable Demo throws NullPointerException Changes: https://git.openjdk.java.net/jdk/pull/4969/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4969&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-4819544 Stats: 7 lines in 1 file changed: 6 ins; 0 del; 1 mod Patch: https://git.openjdk.java.net/jdk/pull/4969.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/4969/head:pull/4969 PR: https://git.openjdk.java.net/jdk/pull/4969
