hocam main method 'u içeren class üzerine sağ tıklayıp, "run as"->"java application" demeyi dener misin bi.. ben bilmem, belki olmaz ama şurda yle yazıyor: http://stackoverflow.com/questions/22381202/a-jni-error-has-occurred-please-check-your-installation-and-try-again-in-eclips

package Gui; import java. awt. ; import java. awt. event. ; public class BorderLayoutSinifi extends Frame implements WindowListener{ public BorderLayoutSinifi public static void main derleyince aldıgım hata bu arastırdım pek birşey bulamadım bırkac yontem denedım olmadı bilen varmı acaba java. lang. ClassFormatError: Duplicate field name&signature in class file Gui/BorderLayoutSinifi at java. lang. ClassLoader. defineClass1 at java. lang. ClassLoader. defineClass(ClassLoader. java:760) at java. security. SecureClassLoader. defineClass(SecureClassLoader. java:142) at java. net. URLClassLoader. defineClass(URLClassLoader. java:467) at java. net. URLClassLoader. access$100(URLClassLoader. java:73) at java. net. URLClassLoader$1. run(URLClassLoader. java:368) at java. net. URLClassLoader$1. run(URLClassLoader. java:362) at java. security. AccessController. doPrivileged at java. net. URLClassLoader. findClass(URLClassLoader. java:361) at java. lang. ClassLoader. loadClass(ClassLoader. java:424) at sun. misc. Launcher$AppClassLoader. loadClass(Launcher. java:331) at java. lang. ClassLoader. loadClass(ClassLoader. java:357) at sun. launcher. LauncherHelper. checkAndLoadMain(LauncherHelper. java:495) Error: A JNI error has occurred, please check your installation and try again Exception in thread "main" Java Result: 1