runtimeexception

I'm new to javafx and i was trying to make a gui from which when a button is clicked, it would go to another window. I tried reading many answers found on Stack Overflow. I even tried making the project again from the beginning...But i keep on getting the same error. That is Exception is Application start method java.lang.reflect.InvocationTargetException javafx My Main import javafx.application.Application; import javafx.fxml.FXMLLoader; import javafx.scene.Parent; import javafx.scene.Scene; import javafx.stage.Stage; import javafx.stage.StageStyle; public class SkyTravelsFx extends

I knew that parcelable are hide something secret, but didn't thought that i need to know them, unitl now. Here is the code i had before: ... parcel.writeBooleanArray(new boolean[]{booleanValue1, booleanValue2, booleanValue3}); .... boolean[] booleans = new boolean[3]; in.readBooleanArray(booleans); ... Somehow it stops working on many devices except my, so i can't reproduce it. Then i decided to change it to: ... parcel.writeBooleanArray(new boolean[]{booleanValue1}); parcel.writeBooleanArray(new boolean[]{booleanValue2}); parcel.writeBooleanArray(new boolean[]{booleanValue3}); ... boolean[]

At this point I'm quite frustrated. I've been researching this for a few days and cannot even isolate anything beyond a cursor problem. I am extending ListActivity and using startManagingCursor(newcursor) in the OnCreate method. Here is the code (the database is already filled) that runs and crashes upon hitting the home button: private void loadAlbums() { try { newcursor = mDbHelper.getAlbumTitlesCursor(); dbalbumadapter = new AlbumListCursorAdapter(this, newcursor); setListAdapter(dbalbumadapter); } catch (SQLiteException s) { newcursor = null; fetchalbums = new FetchAlbumsTask().execute();

异常的概念 异常指不期而至的各种状况，如：文件找不到、网络连接失败、非法参数等。异常是一个事件，它发生在程序编译或运行期间，干扰了正常的指令流程。 Java中的Throwable类是所有异常的基类。它的的众多子类描述各种不同的异常。因而，Java异常都是对象，是Throwable子类的实例，描述了出现在一段编码中的 错误条件。当条件生成时，错误将引发异常。 Java异常类层次结构及概念 Throwable Throwable 类是 Java 语言中所有错误或异常的超类 异常与错误 注意：异常和错误的区别：异常能被程序本身可以处理，错误是无法处理。 1 Exception 类及其子类用来处理程序错误，它指出了合理的应用程序想要捕获的条件，表示程序本身可以处理的异常 2 Error 是及其子类用来处理系统错误，表示仅靠程序本身无法恢复的严重错误，用于指示合理的应用程序不应该试图捕获的严重问题，Java编译器不去检查这类异常 运行时异常 RuntimeException 类及其子类表示“JVM 常用操作”引发的错误。例如，若试图使用空值对象引用、除数为零或数组越界，则分别引发运行时异常（NullPointerException、ArithmeticException）和 ArrayIndexOutOfBoundException。 可查异常 和 不可查异常 通常，Java的异常

I've developed a Libgdx application and tested it on my Samsung Galaxy S3(4.1.2) where it is working great. I tried to test it on a Galaxy Grand(4.1.2) but it failed. In the logcat, I found the following: caused by com.badlogic.gdx.utils.GdxRuntimeException couldn't load shared library 'gdx' for target: Linux, 32-bit This happened when changing the device only so any idea what is the cause?! The complete logcat: 05-22 20:25:01.745: E/AndroidRuntime(12725): FATAL EXCEPTION: main 05-22 20:25:01.745: E/AndroidRuntime(12725): java.lang.ExceptionInInitializerError 05-22 20:25:01.745: E

Generally if any class extends Exception , it becomes checked exception. Runtime exception also extends Exception. Then how is it unchecked exception ? Is it like they have a custom check in compiler for this special case? EDIT : I have proper idea about checked v/s unchecked exception and their pros & cos etc. I don't except differences between them in answer. It's explicitly in the specification, section 11.1.1 : RuntimeException and all its subclasses are, collectively, the runtime exception classes . The unchecked exception classes are the runtime exception classes and the error classes.

I have some code that might throw both checked and runtime exceptions. I'd like to catch the checked exception and wrap it with a runtime exception. But if a RuntimeException is thrown, I don't have to wrap it as it's already a runtime exception. The solution I have has a bit overhead and isn't "neat": try { // some code that can throw both checked and runtime exception } catch (RuntimeException e) { throw e; } catch (Exception e) { throw new RuntimeException(e); } Any idea for a more elegant way? I use a "blind" rethrow to pass up checked exceptions. I have used this for passing through the

Why is catching a RuntimeException using catch(Throwable exc) {} not considered a good programming practice? What is the right way to handle RuntimeExceptions? Also, why does catch(Exception exc) {} not catch RuntimeException ? How is this behavior implemented? Usually, a RuntimeException indicates a programming error (in which case you can't "handle" it, because if you knew to expect it you'd have avoided the error). Catching any of these general exceptions (including Throwable ) is a bad idea because it means you're claiming that you understand every situation which can go wrong, and you can

Say that I have the following code: ExecutorService executor = Executors.newSingleThreadExecutor(); executor.execute(myRunnable); Now, if myRunnable throws a RuntimeExcpetion , how can I catch it? One way would be to supply my own ThreadFactory implementation to newSingleThreadExecutor() and set custom uncaughtExceptionHandler s for the Thread s that come out of it. Another way would be to wrap myRunnable to a local (anonymous) Runnable that contains a try-catch -block. Maybe there are other similar workarounds too. But... somehow this feels dirty, I feel that it shouldn't be this complicated.