Java 1.6.0 do Mac OS X + Eclipse 3.4 + Glassfish V2 + GWT 1.5 -> Bad version number in .class file

compile.gwt:

[java] Exception in thread “main” java.lang.UnsupportedClassVersionError: Bad version number in .class file

[java] at java.lang.ClassLoader.defineClass1(Native Method)

[java] at java.lang.ClassLoader.defineClass(ClassLoader.java:675)

[java] at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)

[java] at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)

[java] at java.net.URLClassLoader.access$100(URLClassLoader.java:56)

[java] at java.net.URLClassLoader$1.run(URLClassLoader.java:195)

[java] at java.security.AccessController.doPrivileged(Native Method)

[java] at java.net.URLClassLoader.findClass(URLClassLoader.java:18

[java] at java.lang.ClassLoader.loadClass(ClassLoader.java:316)

[java] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:280)

[java] at java.lang.ClassLoader.loadClass(ClassLoader.java:251)

[java] at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:374)

[java] at java.lang.Class.forName0(Native Method)

[java] at java.lang.Class.forName(Class.java:242)

[java] at com.google.gwt.dev.javac.JdtCompiler$INameEnvironmentImpl.findType(JdtCompiler.java:140)

[java] at com.google.gwt.dev.javac.JdtCompiler$INameEnvironmentImpl.findType(JdtCompiler.java:125)

[java] at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:122)

[java] at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:17

[java] at org.eclipse.jdt.internal.compiler.lookup.Scope.getType(Scope.java:2187)

[java] at com.google.gwt.dev.javac.LongFromJSNIChecker$CheckingVisitor.findClass(LongFromJSNIChecker.java:18

[java] at com.google.gwt.dev.javac.LongFromJSNIChecker$CheckingVisitor.getField(LongFromJSNIChecker.java:214)

[java] at com.google.gwt.dev.javac.LongFromJSNIChecker$CheckingVisitor.checkFieldRef(LongFromJSNIChecker.java:87)

[java] at com.google.gwt.dev.javac.LongFromJSNIChecker$CheckingVisitor.checkRefs(LongFromJSNIChecker.java:142)

[java] at com.google.gwt.dev.javac.LongFromJSNIChecker$CheckingVisitor.endVisit(LongFromJSNIChecker.java:63)

[java] at org.eclipse.jdt.internal.compiler.ast.MethodDeclaration.traverse(MethodDeclaration.java:247)

[java] at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.traverse(TypeDeclaration.java:1222)

[java] at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.traverse(CompilationUnitDeclaration.java:51

[java] at com.google.gwt.dev.javac.LongFromJSNIChecker.check(LongFromJSNIChecker.java:307)

[java] at com.google.gwt.dev.javac.LongFromJSNIChecker.check(LongFromJSNIChecker.java:297)

[java] at com.google.gwt.dev.javac.CompilationUnitInvalidator.validateCompilationUnits(CompilationUnitInvalidator.java:13

[java] at com.google.gwt.dev.javac.CompilationState.compile(CompilationState.java:123)

[java] at com.google.gwt.dev.GWTCompiler.distill(GWTCompiler.java:327)

[java] at com.google.gwt.dev.GWTCompiler.run(GWTCompiler.java:564)

[java] at com.google.gwt.dev.GWTCompiler.run(GWTCompiler.java:554)

[java] at com.google.gwt.dev.GWTCompiler.main(GWTCompiler.java:214)

[java] Java Result: 1