I use idea api createFileChooser as follows,but can not search the file I want, what's the problem?

PsiFile ps = PsiManager.getInstance(project).findFile(virtualFiles[0]);
TreeFileChooser.PsiFileFilter psiFileFilter = new TreeFileChooser.PsiFileFilter() {
    @Override
    public boolean accept(PsiFile psiFile) {
        return true;
    }
};
//PsiFile ps = PsiFileFactory.getInstance(project).createFileFromText("psi", StdFileTypes.CLASS,null);
TreeFileChooser fileChooser = TreeClassChooserFactory.getInstance(project).createFileChooser("选择类",ps, StdFileTypes.CLASS, psiFileFilter);
fileChooser.showDialog();