Change the order of col-*-12 columns in Bootstrap using push/pull

Actually you can not reorder the columns having .col-*-12 by push/pull helper classes. The sum of columns exceeds the default 12 columns which is defined by @grid-columns. You could either change the order of columns in HTML and then use the ordering classes on larger screens as follows: EXAMPLE HERE <div class=”row”> <div class=”col-xs-12 col-sm-6 … Read more

“Comparison method violates its general contract!” – TimSort and GridLayout

It seems to me like you’ve hit a bug in the JDK since the error seems to come from Swing classes. Options: Define the property java.util.Arrays.useLegacyMergeSort as true. Either using in your code the line System.setProperty(“java.util.Arrays.useLegacyMergeSort”, “true”); before any Swing code. As the first line in the main method should work. Or adding -Djava.util.Arrays.useLegacyMergeSort=true to … Read more