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Chapter 4 - 2
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- 1An identifier may only containLetters, numbers, $ , or _ .
Also, the first character is not allowed to be a number, and reserved words are not allowed.
By convention, methods begin with a lowercase letter but are not required to - 2Method signature: ExceptionYou can list as many types of exceptions as you want in this clause sepa-
rated by commas - 3A vararg parameterIt must be the last element in a method’s parameter list. This implies you are only allowed to have one vararg parameter per method. You can pass in an
array, or you can list the elements of the array and let Java create it for you. You can even
omit the vararg values in the method call and Java will create an array of length zero for
you. - 4Vararg: empty parameterJava will create an empty array if no parameters are passed for a
vararg. However, it is still possible to pass null explicitly:
walk(int i, int... nums);
walk(1);
walk(1, 1);
walk(1, null); // throws a NullPointerException
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- OCA Java Fichas sobre Chapter 4 - 2, creado por Everton Gonçalves el 23/11/2018.
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- Everton Gonçalves
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