List all subclasses with fully qualified names

Question

I would like to get a list of all subclasses of a given class with their fully qualified names. I wanted to copy it from Eclipse and paste into a text file like this:

<

Answer 1

The method in the Hierarchy view which does build the hierarchy tree is in the org.eclipse.jdt.internal.ui.typehierarchy.TypeHierarchyLifeCycle:

private ITypeHierarchy createTypeHierarchy(IJavaElement element, IProgressMonitor pm) throws JavaModelException {
    if (element.getElementType() == IJavaElement.TYPE) {
        IType type= (IType) element;
        if (fIsSuperTypesOnly) {
            return type.newSupertypeHierarchy(pm);
        } else {
            return type.newTypeHierarchy(pm);
        }
    } else {

Which uses org.eclipse.jdt.internal.core.SourceType class

/**
 * @see IType
 */
public ITypeHierarchy newTypeHierarchy(IJavaProject project, IProgressMonitor monitor) throws JavaModelException {
    return newTypeHierarchy(project, DefaultWorkingCopyOwner.PRIMARY, monitor);
}

So if you can get a IJavaElement, you can check those classes to emulate the same result.

It uses a org.eclipse.jdt.internal.core.CreateTypeHierarchyOperation