Detailed explanation of the definition and use of variable length parameters in Java

Java can define variable length parameters (varargs) for methods to match an uncertain number of parameters, which are defined with "..." express. In fact, this is similar to passing an array for the method, and the use method is the same as that of the array, as follows:

Calling methods is the same as normal calling methods, except that the matching parameters can be 0 to more than one. As follows:

Points to note during use:

1. When calling, if the method can match both fixed parameters and variable length parameters, the fixed parameter method will be matched first.

2. If it can match two methods containing variable parameters at the same time, the compiler will report an error because the compiler does not know which method to call.

3. A method can only have one variable parameter, and the variable parameter should be the last parameter.

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