IPHONE5竟然有透明機殼~也太酷了
Java string null check by != null or !str.equals(null)? - Stack OverflowWhat's the best way to check for not null values in java. String query ="abcd"; query != null vs !query.equals(null). which is better?why? ... 1st one is better (and the only option), because 2nd one will throw NPE, when your value is actually null. As si...
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