Add README for java code dataset

README.md

@@ -1,26 +1,15 @@
 ---
 configs:
-- config_name: default
+- config_name: java
   data_files:
-  - split: train
-    path: data/train-*
-dataset_info:
-  features:
-  - name: text
-    dtype: string
-  splits:
-  - name: train
-    num_bytes: 450915319
-    num_examples: 73035
-  download_size: 137984025
-  dataset_size: 450915319
+    - split: train
+      path: data/java-*.parquet
 ---
 
 # LangMap-TheStack-java-100M
 
-Code finetuning dataset for **java** streamed from
-[bigcode/the-stack](https://huggingface.co/datasets/bigcode/the-stack).
+Code finetuning dataset for **java** streamed from [bigcode/the-stack](https://huggingface.co/datasets/bigcode/the-stack).
 
-- **Target tokens**: 100,000,000
+- **Tokens collected**: 100,000,000 (target: 100,000,000)
 - **Tokenizer**: `allenai/OLMo-3-1025-7B`
 - **Schema**: `{"text": [...]}` (sanitised source code)