Web Reference: 9 I believe you just migrated from C++, Well in java you have to initialize a data type (other then primitive types and String is not a considered as a primitive type in java ) to use them as according to their specifications if you don't then its just like an empty reference variable (much like a pointer in the context of C++). What's actually the difference between String[] and String... if any? The convention is to use String[] as the main method parameter, but using String... works too, since when you use varargs you can call the method in the same way you call a method with an array as parameter and the parameter itself will be an array inside the method body. Let's see it happen in Java terms. Here's the source code of String's equals() method: It compares the Strings character by character, in order to come to a conclusion that they are indeed equal. That's how the String equals method behaves. So datos[0].equals(usuario) will return true, because it performs a logical comparison.
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