踩坑日記-三元運算子
這篇紀錄運算子，在使用上可能會遇到的坑，避免再次踩坑。
Example
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| String message = "123";
message == null ? "{}" : message
Error exmaple:
StringBuilder out = new StringBuilder("[Message]:" + message == null ? "{}" : message);
System.out.println(out.toString());
Output:123
Correct exmaple:
StringBuilder out = new StringBuilder("[Message]:" + (message == null ? "{}" : message));
System.out.println(out.toString());
Output:[Message]:123
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