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Beitrag 1455 von 2212 (66%)

Autor	mseele
Datum	21.02.03, 16:03
Betreff	URLClassLoader exception

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was mach ich falsch??? exception:

java.lang.ClassNotFoundException: de.guhsoft.dbdesigner.DDimension
at java.net.URLClassLoader$1.run(URLClassLoader.java:198)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:186)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:217)
at ClassLoad.loadClass(ClassLoad.java:27)
at ClassLoad.(ClassLoad.java:11)
at ClassLoad.main(ClassLoad.java:41)
java.lang.NullPointerException
at ClassLoad.loadClass(ClassLoad.java:36)
at ClassLoad.(ClassLoad.java:11)
at ClassLoad.main(ClassLoad.java:41)
Exception in thread "main" Process terminated with exit code 1

String locationString = "E:\\tmp\\tests\\XXX.jar";
String driverClassName = "de.guhsoft.dbdesigner.DDimension";
URL urls[] = new URL[1];
try {
urls[0] = new File(locationString).toURL();
} catch (MalformedURLException e) {
e.printStackTrace();
}
DDimension dim = null;
try {
ClassLoader loader = new URLClassLoader(urls);
//Class c = loader.loadClass(driverClassName);
Class c = Class.forName(driverClassName, false, loader);
dim = (DDimension)c.newInstance();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
dim.setSize(400, 400);
System.out.println(dim);

ps: DDimension ist nur ne abgeleitete Dimension klasse!!!

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