Not able to get the latest image tag from repository

[irfanjs]

I have written following code from using SDK

   ListImagesRequest re1 = new ListImagesRequest();
		        re1.setRepositoryName("test1");
		        ListImagesResult res1 = ecr.listImages(re1);
		        System.out.println(res1.getImageIds());

Im getting all image IDs but , how to get the latest image tag ?? . I did not not find any method for that .
Do I have to apply any filter ?

[irfanjs]

can someone please suggest ?
Im blocked