In a J2EE project Ctrl+click on methods (usually only local methods, ones that belong to the same class) doesn't jump to that method declaration. The eclipse project was created using Gradle so that might be an issue, also when Eclipse starts the log has the following exception:
A handler conflict occurred. This may disable some commands. Conflict for 'org.eclipse.wst.jsdt.ui.edit.text.java.open.editor':HandlerActivation(commandId=org.eclipse.wst.jsdt.ui.edit.text.java.open.editor, handler=ActionHandler(org.eclipse.wst.jsdt.ui.actions.OpenAction@c5f6db), expression=AndExpression(AndExpression(org.eclipse.ui.SubActionBars$1@fdd15b,ActivePartExpression(org.eclipse.ui.navigator.resources.ProjectExplorer@38ba04)),WorkbenchWindowExpression(org.eclipse.ui.internal.WorkbenchWindow@1f528ab)),sourcePriority=1064961) HandlerActivation(commandId=org.eclipse.wst.jsdt.ui.edit.text.java.open.editor, handler=ActionHandler(org.eclipse.wst.jsdt.ui.actions.OpenAction@c5f6db), expression=AndExpression(AndExpression(org.eclipse.ui.SubActionBars$1@fdd15b,ActivePartExpression(org.eclipse.ui.navigator.resources.ProjectExplorer@38ba04)),WorkbenchWindowExpression(org.eclipse.ui.internal.WorkbenchWindow@1f528ab)),sourcePriority=1064961)
I am running eclipse on Fedora 12 distro
it seems you didn't put the source code into your classpath. just right click you source code package and select "build path -> use as source folder"