Update knowledge learnt

students/asdfghjkxd/knowledge.md

@@ -1,7 +1,18 @@
-### Tool/Technology 1
+### Java
 
-List the aspects you learned, and the resources you used to learn them, and a brief summary of each resource.
+Java is a high-level, object-oriented and general-purpose programming language. It is used primary in the backend for RepoSense.
 
-### Tool/Technology 2
+#### Aspects Learned
 
-...
+Some of the aspects I have learnt regarding Java:
+
+* Using the IntelliJ Java Profiler to analyse code run time and memory usage to identify possible areas of optimisation
+* Learning more about different code design patterns such as the Builder pattern
+* Learning how to adapt design patterns for our own needs
+
+#### Resources Used
+
+* Java Source Code
+  * The source code for Java was used to verify the time and memory usage of the code given by the code profiler, by cross-referencing bottlenecks identified in the code profile with the source code to identify inefficient code in the codebase
+* Online Java resources such as [baeldung.com](https://www.baeldung.com/)
+  * The resources provided alternative ways of achieving a certain results, which may help to increase the efficiency of the code