exception in thread main java lang error unresolved compilation problem

; + - - - - - - - - - - - - - - - - - - the Target:buildgetintheader * - - - - - - - - - - - - - - - - - - $ Targetname= "Buildgetintheader">Panax Notoginseng - Target> the + A Project>3. SolutionsMethod (1)Perform the following steps: Run, External tools, External Tools Configurations dialogSelect the JRE option in the interface　　　　　Select Run in same JRE as workspaceOnce all is done, the problem can be solved by recompili

Use the command Java-jar Springboot.jar to start the project with the following error:ExceptioninchThread"Main"Java.lang.StringIndexOutOfBoundsException:String Index outof range:Panax NotoginsengAt java.lang.String.substring (String.java:1963) at Org.springframework.boot.loader.jar.JarFile.createJarFileFromDirectoryEntry (Jarfile.java:278) at Org.springframework.boot.loader.jar.JarFile.createJarFileFromEntry (Jarfile.java:258) at Org.springframework.b

Today, after installing Tomcat7.0.21, it is OK to start the Web service separately with D:\apache-tomcat-7.0.21\bin\startup.bat. However, after you have integrated configuration Tomcat7 in MyEclipse8.5, the following error message appears when you start the Tomcat service in MyEclipse:Exception in thread "main" java.lang.noclassdeffounderror:org/apache/juli/logging/logfactoryAt Org.apache.catalina.startup.B

Exception in thread "main" java.lang.unsupportedclassversionerror:com/mapreduce/demo1/count:unsupported Major.minor Version 51.0Cause: A change in the compilation environment.The JDK in Eclipse uses 1.7, the computer is installed on the actual JDK1.6, compile does not pass the report above error.WORKAROUND: Set the project's build environment to the JDK version o

, and exceptions are thrown directly to the console (because of the nature of threads, you cannot capture exceptions that escape from threads). Once the exception escapes from the task's Run method, it propagates outwards to the console unless you catch the exception in a special form. , this can make you very headache, unable to catch the exception can not handl

The following code is not compiled in Java:public class Unreachabletest {public static void main (string[] args) {while (true) {}system.out.println ("aaaaaa");}}This code does not seem to have any syntax errors, but it is very obvious that this code is not meant to be, AAAAA will never output,Java, however, differs from the C language in that Java considers this code to be an unreachable language

The problem with idea running exception in thread "main" java.lang.nosuchmethoderror:scala.collection.immutable.hashset$This type of error is due primarily to the inconsistency between running Scala in the environment and the version of Scala in idea. Change them to the same version, but a lot of new people don't know

("-----------------------"); while (Rs.next ()) {System.out.println (rs.getstring ("Job_desc")); } rs.close (); St.close (); Con.close (); The catch (Exception err) {System.out.println ("CoNnect failed! "); Err.printstacktrace (System.out); } } } 2, switch to the Java source code in the folder directory, the co