Java cleanups (#1776)

* Remove extra ';'s
* Remove unnecessary conversions to String
* Use StandardCharsets object
* Replace infinite while with check for interrupted thread
* Remove redundant local vars
* Remove redundant throws clause
* Remove redundant primitive wrapping
* Fix malformed Nested class test
* Remove unnecessary unboxing
* Remove unnecessary explicit type argument
* Replace lambdas with method references
* Replace statement lambdas with expression lambdas
* Replace null check with method call
* Replace number comparison with method call
* Fix broken javadoc comments
* Replace Arrays.asList with singletonLists
* Remove excessive lambda usage
* Remove redundant string operation
* Remove redundant type casts
* Remove unnecessary returns
* Remove redundant suppressions
* Fix unresolved file reference
* static analysis fixes

wpilibjIntegrationTests/src/main/java/edu/wpi/first/wpilibj/AbstractInterruptTest.java

@@ -1,5 +1,5 @@
 /*----------------------------------------------------------------------------*/
-/* Copyright (c) 2008-2018 FIRST. All Rights Reserved.                        */
+/* Copyright (c) 2008-2019 FIRST. All Rights Reserved.                        */
 /* Open Source Software - may be modified and shared by FRC teams. The code   */
 /* must be accompanied by the FIRST BSD license file in the root directory of */
 /* the project.                                                               */
@@ -161,7 +161,7 @@ public abstract class AbstractInterruptTest extends AbstractComsSetup {
   }
 
   @Test(timeout = 2000)
-  public void testMultipleInterruptsTriggering() throws Exception {
+  public void testMultipleInterruptsTriggering() {
     // Given
     final InterruptCounter counter = new InterruptCounter();
     TestInterruptHandlerFunction function = new TestInterruptHandlerFunction(counter);