Bug 90082 [1.5][generics] "New Class" wizard is not able to implement generic interfaces
In Eclipse 3.1 (JDT version I20050219-1500), the wizard for creating a new class seems unable to implement generic interfaces while specifying its argument. For example, implementing Comparable<Integer> is impossible; you have to first implement Comparable, and then correct the genearted stub for specifying its type argument. (in this example, replacing the Object argument of comparesTo by Integer.)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/wizards/NewTypeWizardPage.java
/*
	 * @see org.eclipse.jdt.ui.wizards.NewContainerWizardPage#containerChanged()
	 */
	protected IStatus containerChanged() {
		IStatus status= super.containerChanged();
	    if ((fTypeKind == ANNOTATION_TYPE || fTypeKind == ENUM_TYPE) && !status.matches(IStatus.ERROR)) {
	    	IPackageFragmentRoot root= getPackageFragmentRoot();
	    	if (root != null && !JavaModelUtil.is50OrHigher(root.getJavaProject())) {
				return new StatusInfo(IStatus.WARNING, NewWizardMessages.getFormattedString("NewTypeWizardPage.warning.NotJDKCompliant", root.getJavaProject().getElementName()));  
	    	}
	    	if (fTypeKind == ENUM_TYPE) {
		    	try {
		    	    
		    	    if (findType(root.getJavaProject(), "java.lang.Enum") == null) 
		    	        return new StatusInfo(IStatus.WARNING, NewWizardMessages.getString("NewTypeWizardPage.warning.EnumClassNotFound"));  
		    	} catch (JavaModelException e) {
		    	    JavaPlugin.log(e);
		    	}
	    	}
	    }
		
		fCurrPackageCompletionProcessor.setPackageFragmentRoot(getPackageFragmentRoot());
		if (getPackageFragmentRoot() != null) {
			
			fEnclosingTypeCompletionProcessor.setPackageFragment(getPackageFragmentRoot().getPackageFragment("")); 
		}
		return status;