int a = 10, b = 5, c = 2; int result = a + b * c; // → 10 + (5 * 2) = 20 int x = (a + b) * c; // → (10 + 5) * 2 = 30 boolean check = (a = b) == 5; // aにbを代入 → その後、a==5を評価 ...

Most new Java developers quickly learn that they should generally compare Java Strings using String.equals(Object) rather than using ==. This is emphasized and reinforced to new developers repeatedly ...

PlatformException: PlatformException(error, Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference, null) File "message_codecs.dart", line 551, ...

Attempt to invoke virtual method 'boolean java.lang.String.equals (java.lang.Object)' on a null object reference #290 Closed ...