classnotfoundexception

问题 im working on a gwt webapp and while working on it im getting this exception while trying to get a XML file from a URL in a remove servlete. i dont know much about the underworkings of gwt, maybe someone can help me out this is the code to get the data from the url public static String readURL(String path) throws IOException{ String data = ""; URL url = new URL(path); URLConnection conn = url.openConnection(); BufferedReader br = new BufferedReader(new InputStreamReader( conn.getInputStream()

问题 Actually I am getting an error: Exception in thread "main" java.lang.NoClassDefFoundError:sun/io/CharToByteConverter This is because in Java 8, the CharToByteConverter class has been removed as it was deprecated. Now I want to know of any alternative which would replace this package/class and provide its functionality without throwing the exception mentioned above. This class is used in the SQLJ's Translator.jar and inside it it is in sqlj.util.io.OracleOutputStream.class Edit: If I replace

问题 I am using latest version of Intellij Idea and set jdk as 11. When I execute my project it throws exception noclassfoundexception : java.sql.SQLException. In java compiler settings in Intellij I have mentioned project bytecode version as 11. In project structure settings too, I have set the module jdk as 11. 回答1: Try to change command line shortening method to "JAR manifest". I had exactly the same issue after upgrading my project from Java 8 to Java 11. It looks like it is IntelliJ IDEA bug.

问题 I have an Android application in which I add one more enum: public enum RootNavigationOption { HOME(R.string.home, R.drawable.ic_home), SETTINGS(R.string.settings, R.drawable.ic_settings), LOGOUT( R.string.logout_label, R.drawable.ic_logout); private int navigationOptionLabelResId; private int navigationOptionImageResId; private RootNavigationOption(int navigationOptionLabelResId, int navigationOptionImageResId) { this.navigationOptionLabelResId = navigationOptionLabelResId; this

问题 When i start app in Android 4.1.2 there are no any exception but when i start app in Android 2.3.5 i get this exception: java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.russian.apps/com.russian.apps.TabActivity}: java.lang.ClassNotFoundException: com.russian.apps.TabActivity in loader dalvik.system.PathClassLoader[/data/app/com.russian.apps-1.apk] 05-20 16:23:57.668: E/AndroidRuntime(608): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java

问题 I have a class that handles Guice bindings. It is the very first thing that needs to run, called ApplicationAutoworkout.java. package com.redsoft.android.autoworkout; import java.util.List; import roboguice.application.RoboApplication; import com.google.inject.Module; import com.redsoft.android.autoworkout.service._ModuleQueryFor; import com.redsoft.android.autoworkout.service._ModuleService; import com.redsoft.android.autoworkout.ui._ModuleUi; public class ApplicationAutoworkout extends

问题 I am running a shell script which calls a java class to get some data from database and create an excel report with that data. I get the error Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/poi/ss/usermodel/Workbook when the code hits the below line in my java class: XSSFWorkbook workbook = new XSSFWorkbook (); This is how I have defined the classpath: CLASSPATH=${CLASSPATH}:<path-to-jars>/poi-2.5.1-final-20040804.jar CLASSPATH=${CLASSPATH}:<path-to-jars>/poi-ooxml-3.11

问题 I have got a few (4) error reports on my app from when the Android system decides to do the backup to Google cloud using the BackupAgent. I am using the SharedPreferencesBackupHelper. The stack trace looks like this (my real package name is replaced below by com.xxx.yyy): java.lang.RuntimeException: Unable to create BackupAgent com.xxx.yyy.MyBackupAgent: java.lang.ClassNotFoundException: com.xxx.yyy.MyBackupAgent in loader dalvik.system.PathClassLoader[/mnt/asec/com.xxx.yyy-1/pkg.apk] at

问题 Hey guys. I am developing a client/server program where the client is an android device. The server has a listener class that reads an object from the input stream. I created a client software for another COMPUTER that sends a small object over a local network. Computer to Computer works perfectly fine , i read the object and printed the contents. However, the SAME code ported over to android (I rewrote it just in case) does not work. I construct an object (ANY object), which is serializable,

问题 I'm trying to create a web service and deply it on Tomcat. I'm following this tutorial. I'm using Eclipse Europa. But when I try to start the server it returns this error: java.lang.ClassNotFoundException: org.apache.catalina.core.ThreadLocalLeakPreventionListener at java.net.URLClassLoader$1.run(URLClassLoader.java:217) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:205) at java.lang.ClassLoader.loadClass(ClassLoader