Bug 20633 inner "new interface" in a class - why option "static"? [code manipulation]
When you add an inner interface to a class or interface, the "new interface" dialog offers a checkbox "static". Wether an inner interface is static or not does not make a bit of a difference. So the main effect that checkbox is likely to have is, it confuses Java-newcomers. "Could you please tell me what this decision I have to make means?" (Nothing.) Get rid of that checkbox.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/wizards/NewTypeWizardPage.java
if (typeInCU != null) {
				if (typeInCU.getCompilationUnit() != null) {
					enclosingType= typeInCU;
				}
			} else {
				ICompilationUnit cu= (ICompilationUnit) elem.getAncestor(IJavaElement.COMPILATION_UNIT);
				if (cu != null) {
					enclosingType= cu.findPrimaryType();
				}
			}
			
			try {
				IType type= null;
				if (elem.getElementType() == IJavaElement.TYPE) {
					type= (IType)elem;
					if (type.exists()) {
						String superName= JavaModelUtil.getFullyQualifiedName(type);
						if (type.isInterface()) {
							initSuperinterfaces.add(superName);
						} else {
							initSuperclass= superName;
						}
					}
				}
			} catch (JavaModelException e) {
				JavaPlugin.log(e);
				
			}
		}