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This issue was reported manually by pellierdaniel. It already has 4 duplicates Build: NetBeans IDE 8.1 Beta (Build 201508041349) VM: Java HotSpot(TM) 64-Bit Server VM, 25.66-b02, Java(TM) SE Runtime Environment, 1.8.0_66-ea-b02 OS: Linux User Comments: GUEST: On create a java application. GUEST: I create one Interface exemple: public interface DataBase { void persist(final Batch batch); } I create one class who implements this interface exemple public class Table1 implements DataBase { private String data1; public String getData1() { return data1; } public String setData1(final String data1) { this.data1 = data1; } } When I change with the screen of interface and the screen of class I see this exception. GUEST: Created a new class inside of a package. ewer: Closed one editor window Stacktrace: java.lang.IncompatibleClassChangeError: Implementing class at java.lang.ClassLoader.defineClass1(ClassLoader.java:0) at java.lang.ClassLoader.defineClass(ClassLoader.java:760) at org.netbeans.JarClassLoader.doLoadClass(JarClassLoader.java:311) at org.netbeans.ProxyClassLoader.selfLoadClass(ProxyClassLoader.java:259) at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:187) at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
Created attachment 156169 [details] stacktrace
This bug already has 5 duplicates see http://statistics.netbeans.org/exceptions/detail.do?id=214527
Exception in PMD module. Duplicate of bug 249453. Thank you for reporting. *** This bug has been marked as a duplicate of bug 249453 ***