Problem This ArrayIndexOutOfBoundsException: 0 means that the index 0 is not a valid index for your array args[], which in turn means that your array is empty. In this particular case of a main() method, it means that no argument was passed on to your program on the command line. Possible solutions If you’re running … Read more
Is there any way to throw multiple exceptions in java?
This is not a synchronization problem. This will occur if the underlying collection that is being iterated over is modified by anything other than the Iterator itself. This will throw a ConcurrentModificationException when the it.hasNext() is called the second time. The correct approach would be Assuming this iterator supports the remove() operation.
You should add client option to your mysql-connector allowPublicKeyRetrieval=true to allow the client to automatically request the public key from the server. Note that allowPublicKeyRetrieval=True could allow a malicious proxy to perform a MITM attack to get the plaintext password, so it is False by default and must be explicitly enabled. you could also try … Read more
Catch System.Exception and switch on the types
problem is not in the code, but you don’t have added the driver to your project!!! You have to add the *.jar driver to your project… Try putting this in your lib directory, then re-starting tomcat… problem is Class.forName(“com.mysql.jdbc.Driver”); it tries to load the driver, but it is not getting it, this is the reason … Read more
You are facing a connection breakdown. Does this happen in 3G, WiFi or “plain” connection on a computer? Anyway, you must assume that the connection may be lost from time to time, when writing your app. For example, with mobiles, this happens frequently in the tube, in basements, etc. With PC apps, this is less … Read more
in eclipse, go to Project > Clean… select your project, then press OK relaunch the app if it happens again delete the r.java file. it will generate automatically.
You need to read the processor manual to drill this down. It is triggered by a “trap”, best described as an exception in the processor. A trap interrupts code execution and lets an operating system “catch” handler deal with the fault. A very common benign one is a page fault, raised when the processor tries … Read more
Use TestCase.assertRaises (or TestCase.failUnlessRaises) from the unittest module, for example: