【Play】异常处理

【异常一、始终无法启动测试单元】

 

对Play而言，她只允许一个Java文件中包含1个类，或者嵌套类

如果1个Java文件中出现2个以上的类，就会报以下异常：

这可能跟Play及时编译源码运行有关

如果是app目录下某个Java文件中包含2个以上的类，则启动应用就会抛异常

如果是test目录下某个Java文件中包含2个以上的类，则启动测试单元就会抛异常

解决办法：

将类独立出来，不要放在1个Java文件中。

http://play.lighthouseapp.com/projects/57987/tickets/1379-unexpectedexception

 

play.exceptions.UnexpectedException: Unexpected Error
	at play.Play.start(Play.java:556)
	at play.test.PlayJUnitRunner.<init>(PlayJUnitRunner.java:34)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
	at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:31)
	at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:24)
	at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57)
	at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:29)
	at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57)
	at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:24)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.<init>(JUnit4TestReference.java:33)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestClassReference.<init>(JUnit4TestClassReference.java:25)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:48)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:452)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.NullPointerException
	at play.classloading.ApplicationCompiler$2.acceptResult(ApplicationCompiler.java:266)
	at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:478)
	at play.classloading.ApplicationCompiler.compile(ApplicationCompiler.java:282)
	at play.classloading.ApplicationClassloader.getAllClasses(ApplicationClassloader.java:426)
	at play.Play.start(Play.java:516)
	... 19 more