ICJ cases can be found on the International Court of Justice site:
Select Cases and then from the drop-down list 'Judgments, Advisory Opinions and Orders'
You can then search by date. Once you locate your case, select the PDF button on the top right side of the page.
If you wish to search ICJ cases by topic or case name you will need to search in multiple locations:
This is a peer reviewed online encyclopedia dealing with essential topics of international law.
Lexis Advance (Formerly LexisNexis International)
LexisNexis International contains a comprehensive collection of full text legal resources including both primary and secondary material from the United States, Canada, United Kingdom, Australia and other jurisdictions.
U.S. and foreign primary and secondary legal materials.
Includes UN Treaty Series 1946+League of Nations Treaty Series and Status of Multilateral treaties deposited with the Secretary-General series. It has a complex search process... Add your search criteria - date, parties, location, type of document prior to selecting 'Search'.
Then select PDF:
Includes the United Nations Treaty Series, the League of Nations Treaty Series, and supporting materials.
Search or browse almost 30 treaty series containing either the texts or summaries of multilateral and bilateral treaties.
There are also Treaty collections by subject area or region:
Some important topical collections of treaties include:
Some regional treaty collections (or portions of those collections) are now available on the web. These collections include the following: