Could not initialize class org.testng.eclipse.util.ClassMethodsSuite

Question

java.lang.NoClassDefFoundError: Could not initialize class org.testng.eclipse.util.ClassMethodsSuite at org.testng.eclipse.util.SuiteGenerator.createCustomizedSuite(SuiteGenerator.java:34) at org.testng.eclipse.ui.util.ConfigurationHelper.createLaunchSuites(ConfigurationHelper.java:604) at org.testng.eclipse.ui.util.ConfigurationHelper.getLaunchSuites(ConfigurationHelper.java:448) at org.testng.eclipse.launch.TestNGLaunchConfigurationDelegate.createVMRunner(TestNGLaunchConfigurationDelegate.java:315) at org.testng.eclipse.launch.TestNGLaunchConfigurationDelegate.launchTypes(TestNGLaunchConfigurationDelegate.java:156) at org.testng.eclipse.launch.TestNGLaunchConfigurationDelegate.launch(TestNGLaunchConfigurationDelegate.java:93) at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:862) at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:720) at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:1029) at org.eclipse.debug.internal.ui.DebugUIPlugin$2.run(DebugUIPlugin.java:1243) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

Answer 1

Uninstalled TestNg and reinstalled and now the error is not occurring. Moved Old Eclipse to Trash and used new Instance

Answer 2

Uninstall the TestNG Plugin & Reinstall the new one. It works for me.