static String jni_signature(Class c) { if (c == int.class) return "I"; if (c == long.class) return "J"; if (c == short.class) return "S"; if (c == byte.class) return "B"; if (c == boolean.class) return "Z"; if (c == double.class) return "D"; if (c == float.class) return "F"; if (c == char.class) return "C"; if (c == void.class) return "V"; if (c.isArray()) return "[" + jni_signature(c.getComponentType()); return "L" + name(c) + ";"; }