exception

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: When to choose checked and unchecked exceptions When should I create a checked exception, and when should I make a runtime exception? For example, suppose I created the following class: public class Account { private float balance; /* ... constructor, getter, and other fields and methods */ public void transferTo(Account other, float amount) { if (amount > balance) throw new NotEnoughBalanceException(); /* ... *

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: When to choose checked and unchecked exceptions When should I create a checked exception, and when should I make a runtime exception? For example, suppose I created the following class: public class Account { private float balance; /* ... constructor, getter, and other fields and methods */ public void transferTo(Account other, float amount) { if (amount > balance) throw new NotEnoughBalanceException(); /* ... *

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: When to choose checked and unchecked exceptions When should I create a checked exception, and when should I make a runtime exception? For example, suppose I created the following class: public class Account { private float balance; /* ... constructor, getter, and other fields and methods */ public void transferTo(Account other, float amount) { if (amount > balance) throw new NotEnoughBalanceException(); /* ... *

问题 ErrorException: Trying to get property of non-object: PHP beginner Trying to retreive data from database. show.blade.php @extends('main') @section('title','| Station details') @section('content') <h1>{{ $station->station_name }}</h1> <p class="lead">{{ $station->station_name }}</p> @endsection controller - <?php namespace App\Http\Controllers; use Illuminate\Http\Request; use App\Http\Requests; use App\Station; use Session; class StationController extends Controller { /** * Display a listing

问题 ErrorException: Trying to get property of non-object: PHP beginner Trying to retreive data from database. show.blade.php @extends('main') @section('title','| Station details') @section('content') <h1>{{ $station->station_name }}</h1> <p class="lead">{{ $station->station_name }}</p> @endsection controller - <?php namespace App\Http\Controllers; use Illuminate\Http\Request; use App\Http\Requests; use App\Station; use Session; class StationController extends Controller { /** * Display a listing

问题 ErrorException: Trying to get property of non-object: PHP beginner Trying to retreive data from database. show.blade.php @extends('main') @section('title','| Station details') @section('content') <h1>{{ $station->station_name }}</h1> <p class="lead">{{ $station->station_name }}</p> @endsection controller - <?php namespace App\Http\Controllers; use Illuminate\Http\Request; use App\Http\Requests; use App\Station; use Session; class StationController extends Controller { /** * Display a listing

问题 I am trying to handle socket in different threads creating runtime failure. See following code. void MySocket::Lock() { m_LockCount++; if( m_LockCount ) { CSocket::Create( 8080 ); } } void MySocket::Unlock() { m_LockCount--; if( !m_LockCount ) { CSocket::Close(); } } I am calling Lock() from one thread and Unlock() from other. When it executes CSocket::Close() it gives an exception. I googled for this bug and got some reasons. This happens because; a CSocket object should be used only in the

问题 I am getting following exception: java.lang.UnsupportedClassVersionError: net/sourceforge/barbecue/BarcodeException : **Unsupported major.minor version 0.0** at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:621) at java.lang.ClassLoader.defineClass(ClassLoader.java:466) at pl.wroc.pwr.judy2.master.TestClassLoader.loadClass(TestClassLoader.java:51) at java.lang.ClassLoader.loadClass(ClassLoader.java:252) at java.lang.ClassLoader

问题 I wrote a code to find disparity map from two images "left" and "right"; and saving the map in "stereo". The code seems okay to me but somehow I'm getting exception: On the terminal window: OpenCV Error: Bad argument (Unknown array type) in unknown function, file ......\src\opencv\modules\core\src\matrix.cpp, line 698 The code is Mat left = imread( "files\\left.jpg" ); Mat right = imread( "files\\right.jpg" ); Size size = left.size(); namedWindow( "left", CV_WINDOW_AUTOSIZE ); imshow("left",

问题 I have read other related question but i cant really get them to relate to this so I thought it were best to ask, Im pretty new to WPF and so on so please bear with me. I am using this http://www.codeproject.com/KB/WPF/wpf_notifyicon.aspx api to work with custom WPF Windows (in particular FancyBalloon). However, i'm coming across the following problem, I seem unable to start off BalloonTips in a separate thread ( i need this because i'm parsing emails and hence if there are 3 emails for