It’s three completely different things: public means that the method is visible and can be called from other objects of other types. Other alternatives are private, protected, package and package-private. See here for more details. static means that the method is associated with the class, not a specific instance (object) of that class. This means that you can call a static method without creating … Read more
There’s an open issue for this in Google’s IssueTracker. The potential solutions given in the issue (as of the date of this post) are: Click Build -> Clean Disable Instant Run, in Settings -> Build, Execution, Deployment
You can only Extend a single class. And implement Interfaces from many sources. Extending multiple classes is not available. The only solution I can think of is not inheriting either class but instead having an internal variable of each class and doing more of a proxy by redirecting the requests to your object to the … Read more
Hi I’m trying to compile a simple jsp file with tomcat but I kept having this error message test.jsp (at Webcontent) Member.java } As far as I can tell, I am having this problem because my tomcat cannot locate the class file, so I have placed my class files at build/classes/pageNumber (where pageNumber is my … Read more
How can I convert a long to int in Java?
Here is the code: here is the error: eclipse says this: Access restriction: The type ‘Application’ is not API (restriction on required library ‘/Library/Java/JavaVirtualMachines/jdk1.8.0_11.jdk/Contents/Home/jre/lib/rt.jar’)
I want to read this JSON file with java using json simple library. My JSON file looks like this: This is the java code I wrote to read this file: But I get the following exception: Exception in thread “main” java.lang.ClassCastException: org.json.simple.JSONArray cannot be cast to org.json.simple.JSONObject at javaapplication1.JavaApplication1.main(JavaApplication1.java:24) Can somebody tell me what I … Read more
You can use Thread.currentThread().getStackTrace(). That returns an array of StackTraceElements that represent the current stack trace of a program.
Referring more generally to the Container pattern (of which an enterprise Java container could be considered a specialization), the book Server Component Patterns by M.Volter, et al. offers the following: [A CONTAINER provides] an execution environment that is responsible for adding the technical concerns to the COMPONENTS…Conceptually, it wraps the COMPONENTS, thus giving clients the … Read more