System.out is based around a PrintStream which by default flushes whenever a newline is written. From the javadoc: autoFlush – A boolean; if true, the output buffer will be flushed whenever a byte array is written, one of the println methods is invoked, or a newline character or byte (‘\n’) is written So the println … Read more
Soon there will be! I am working on DroidFu, an Android shared library which will give you: tons of utility functions available directly in Activities (and Services), such as spawning list and error dialogs, checking for Intent availability, and other workarounds/replacements for cases where Android lacks desired functionality easy handling of asynchronous tasks (takes care … Read more
(Disclaimer: I am the author of JSPF, so better take my comment with a grain of salt 😉 The main reason I started with the JSPF was because I had the same problem as you have now: I was looking for a simple solution to make my thesis-project 1) extensible and 2) give it a … Read more
Is there a string that will make the isEmpty and isBlank behave differently in a test case? Note that Character.isWhitespace can recognize Unicode characters and return true for Unicode whitespace characters. Determines if the specified character is white space according to Java. A character is a Java whitespace character if and only if it satisfies … Read more
nested class – class defined within other class (includes static and non-static classes) inner class – non-static nested class (instance of inner class need instance of outer class to exist) non-nested (top level) classes Based on your question we know that constructor you want to access is not public. So your class may look like … Read more
Differences: Enums extend java.lang.Enum and gain all of its nice features: Automatic singleton behaviour through correct serialization Automatic human-readable .toString method on enum values without the need to duplicate your enum names .name and .ordinal special-purpose methods Usable in high-performance bitset-based EnumSet and EnumMap classes Enums are treated by the language specially: Enums use a … Read more
@RequestParam just populates stand-alone variables (which may of course be fields in a @ModelAttribute class). These variables will be thrown away when the Controller is done, unless they have been fed into the model. Don’t confuse the word “model” with session. The http conversation is generally: HTTP.GET, server response, then HTTP.POST. When you have the … Read more
To me this seems to be an oversight or limitation in the Java language and I do not think it is possible. The referenced type in an instanceof expression must be reifiable according to JLS 4.7, meaning that it must be expressed as a reifiable type by its fully qualified name. At the same time, … Read more
The answer is to not use commons-logging.jar, since SLF4J was designed to do what commons-logging does but better. As @MahdeTo refers to, you need to use jcl-over-slf4j.jar. Check out the documentation from the slf4j website on migrating from commons-logging.
Well I can’t tell you what the exact problem with Jacoco is, but I can show you how Try With Resources is compiled. Basically, there are a lot of compiler generated switches to handle exceptions thrown at various points. If we take the following code and compile it public static void main(String[] args){ String a … Read more