Add Java with balanced test split

Java/test-00000-of-00001.parquet

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:257ec374cf38b35aa299ee98cfb2035c45d9d66f59e0c06a969c620c2cf4dba8
+size 22651133

Java/train-00000-of-00001.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:af2db9898bbd4f83bd1b907e4509b9e9ad2295c5360ed4f7747fa5abbd845e5d
-size 140700214
+oid sha256:286b1900259fc4c6738ab73455aa761230e568ccd143cf491c502f9c2988b2c1
+size 118260544

README.md

@@ -23,10 +23,13 @@ dataset_info:
     dtype: string
   splits:
   - name: train
-    num_bytes: 397194247
-    num_examples: 134696
-  download_size: 140700214
-  dataset_size: 397194247
+    num_bytes: 338217848
+    num_examples: 114696
+  - name: test
+    num_bytes: 58976398
+    num_examples: 20000
+  download_size: 140911677
+  dataset_size: 397194246
 - config_name: Python
   features:
   - name: content
@@ -83,6 +86,8 @@ configs:
   data_files:
   - split: train
     path: Java/train-*
+  - split: test
+    path: Java/test-*
 - config_name: Python
   data_files:
   - split: train