You can read method desc
using org.objectweb.asm.Type
String desc = "(ILjava/lang/String;)[I";
// params
for(Type type : Type.getArgumentTypes(desc)){
System.out.println(type.getClassName());
}
//return type
System.out.println(Type.getReturnType(desc).getClassName());
output
int
java.lang.String
int[]