java-7 - w3toppers.com

Comparison method violates its general contract! Java 7 only

see this: From http://www.oracle.com/technetwork/java/javase/compatibility-417013.html#source Area: API: Utilities Synopsis: Updated sort behavior for Arrays and Collections may throw an IllegalArgumentException Description: The sorting algorithm used by java.util.Arrays.sort and (indirectly) by java.util.Collections.sort has been replaced. The new sort implementation may throw an IllegalArgumentException if it detects a Comparable that violates the Comparable contract. The previous implementation silently … Read more

Am I using the Java 7 try-with-resources correctly

It’s correct and there’s no requirement for catch clause. Oracle java 7 doc says the resource will be closed regardless of whether an exception is actually thrown or not. You should use a catch clause only if you want to react upon the exception. The catch clause will be executed after the resource is closed. … Read more