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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"On-demand double parsing breaks on integer values","articleBody":"If a JSON stream contains an integer number, `SimdJsonParser` will throw a parse exception if it's given a schema where that number is represented as a double. This applies to bare numbers, object values, and array entries:\n\n```java\n// All of these throw a parse exception\ndouble rawDouble = new SimdJsonParser().parse(\"1\".getBytes(UTF_8), 1, double.class);\ndouble[] array = new SimdJsonParser().parse(\"[1, 2]\".getBytes(UTF_8), 6, double[].class);\nHasDouble box = new SimdJsonParser().parse(\"{\\\"value\\\": 1}\".getBytes(UTF_8), 12, HasDouble.class);\n\nrecord HasDouble(double value) {}\n```\n\nAs far as I can tell, this is because `NumberParser.parseDouble` requires `double` literals to either have a decimal point or exponent part. Should that be the case? I would expect integer number values to be permitted, since they can always be widened to doubles\n","author":{"url":"https://github.com/SamCarlberg","@type":"Person","name":"SamCarlberg"},"datePublished":"2025-08-12T22:53:39.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/70/simdjson-java/issues/70"}