diff --git a/headers.mk b/headers.mk
index 4a8f766..cc035c8 100644
--- a/headers.mk
+++ b/headers.mk
@@ -92,5 +92,5 @@ gdrom/command_packet_format.hpp: regs/gdrom_command_packet_format.csv regs/gen/g
 
 # ISO9660
 
-iso9660/%.hpp: iso9660/%.csv iso9660/byte_position.py
-	python iso9660/byte_position.py $< > $@
+iso9660/%.hpp: iso9660/%.csv iso9660/byte_position_cpp.py
+	python iso9660/byte_position_cpp.py $< > $@
diff --git a/iso9660/byte_position.py b/iso9660/byte_position.py
index 8e7110b..3c13644 100644
--- a/iso9660/byte_position.py
+++ b/iso9660/byte_position.py
@@ -2,11 +2,6 @@ import sys
 from dataclasses import dataclass
 from os import path
 
-from csv_input import read_input
-from generate import renderer
-
-from pprint import pprint
-
 def parse_bp(s):
     if ' to ' in s:
         start0, end0 = s.split(' to ')
@@ -71,54 +66,3 @@ def parse(rows):
             name=field_name,
             content=content_name
         )
-
-type_dict = {
-    1: 'uint8_t',
-    2: 'uint16_t',
-    4: 'uint16_le_be',
-    8: 'uint32_le_be',
-}
-
-def header():
-    yield "#pragma once"
-    yield ""
-    yield "#include <cstdint>"
-    yield "#include <cstddef>"
-    yield ""
-    yield '#include "uint_le_be.hpp"'
-    yield ""
-
-def render_fields(input_name, fields):
-    yield "namespace iso9660 {"
-
-    yield f"struct {input_name} {{"
-    for field in fields:
-        field_size = (field.end - field.start) + 1
-        if field.content == 'numerical_value':
-            assert field_size in type_dict, field
-            type = type_dict[field_size]
-            yield f"const {type} {field.name};"
-        else:
-            if field_size == 1:
-                yield f"const uint8_t {field.name};"
-            elif field_size == 0:
-                yield f"const uint8_t {field.name}[];"
-            else:
-                yield f"const uint8_t {field.name}[{field_size}];"
-    yield "};"
-
-    for field in fields:
-        yield f"static_assert((offsetof (struct {input_name}, {field.name})) == {field.start - 1});"
-
-    yield "}" # namespace
-
-if __name__ == "__main__":
-    input_file = sys.argv[1]
-    input_name0, _ = path.splitext(input_file)
-    _, input_name = path.split(input_name0)
-    rows = read_input(input_file)
-    fields = list(parse(rows))
-    render, out = renderer()
-    render(header())
-    render(render_fields(input_name, fields))
-    sys.stdout.write(out.getvalue())
diff --git a/iso9660/byte_position_cpp.py b/iso9660/byte_position_cpp.py
new file mode 100644
index 0000000..b479d8f
--- /dev/null
+++ b/iso9660/byte_position_cpp.py
@@ -0,0 +1,58 @@
+import sys
+from os import path
+
+from csv_input import read_input
+from generate import renderer
+
+from byte_position import parse
+
+type_dict = {
+    1: 'uint8_t',
+    2: 'uint16_t',
+    4: 'uint16_le_be',
+    8: 'uint32_le_be',
+}
+
+def header():
+    yield "#pragma once"
+    yield ""
+    yield "#include <cstdint>"
+    yield "#include <cstddef>"
+    yield ""
+    yield '#include "uint_le_be.hpp"'
+    yield ""
+
+def render_fields(input_name, fields):
+    yield "namespace iso9660 {"
+
+    yield f"struct {input_name} {{"
+    for field in fields:
+        field_size = (field.end - field.start) + 1
+        if field.content == 'numerical_value':
+            assert field_size in type_dict, field
+            type = type_dict[field_size]
+            yield f"const {type} {field.name};"
+        else:
+            if field_size == 1:
+                yield f"const uint8_t {field.name};"
+            elif field_size == 0:
+                yield f"const uint8_t {field.name}[];"
+            else:
+                yield f"const uint8_t {field.name}[{field_size}];"
+    yield "};"
+
+    for field in fields:
+        yield f"static_assert((offsetof (struct {input_name}, {field.name})) == {field.start - 1});"
+
+    yield "}" # namespace
+
+if __name__ == "__main__":
+    input_file = sys.argv[1]
+    input_name0, _ = path.splitext(input_file)
+    _, input_name = path.split(input_name0)
+    rows = read_input(input_file)
+    fields = list(parse(rows))
+    render, out = renderer()
+    render(header())
+    render(render_fields(input_name, fields))
+    sys.stdout.write(out.getvalue())
diff --git a/iso9660/byte_position_java.py b/iso9660/byte_position_java.py
new file mode 100644
index 0000000..c0633b5
--- /dev/null
+++ b/iso9660/byte_position_java.py
@@ -0,0 +1,68 @@
+import sys
+from os import path
+
+from csv_input import read_input
+from generate import renderer
+
+from byte_position import parse
+
+size_to_accessor = {
+    1: "getByte",
+    4: "getShortLE",
+    8: "getIntLE",
+}
+
+def _camelcase(name, first_upper):
+    want_upper = first_upper
+    for c in name:
+        if c == '_':
+            want_upper = True
+        else:
+            yield c.upper() if want_upper else c
+            want_upper = False
+
+def pascalcase(name):
+    return "".join(_camelcase(name, first_upper=True))
+
+def camelcase(name):
+    return "".join(_camelcase(name, first_upper=False))
+
+def render_fields(input_name, fields):
+    yield "package filesystem.iso9660;"
+
+
+    yield f"public class {pascalcase(input_name)} extends ByteParser {{"
+    for field in fields:
+        if "_res" in field.name.lower():
+            continue
+
+        yield f"public static final int {field.name.upper()}_START = {field.start - 1};"
+        yield f"public static final int {field.name.upper()}_END = {field.end - 1};"
+
+    yield f"{pascalcase(input_name)}(byte[] array, int offset) {{"
+    yield "super(array, offset);"
+    yield "}"
+
+    for field in fields:
+        if "_res" in field.name.lower():
+            continue
+
+        if field.content == 'numerical_value':
+            field_size = (field.end - field.start) + 1
+            accessor = size_to_accessor[field_size]
+
+            yield f"public int {camelcase(field.name)}() {{"
+            yield f"return {accessor}({field.name.upper()}_START);"
+            yield "}"
+
+    yield "}"
+
+if __name__ == "__main__":
+    input_file = sys.argv[1]
+    input_name0, _ = path.splitext(input_file)
+    _, input_name = path.split(input_name0)
+    rows = read_input(input_file)
+    fields = list(parse(rows))
+    render, out = renderer()
+    render(render_fields(input_name, fields))
+    sys.stdout.write(out.getvalue())