Method to operate the java dynamic parameter list

To operate the list of dynamic parameters in java, the varargs mechanism is used. Using variable parameters, it is possible to define a parameter that ends with an ellipsis (...), allowing for the transmission of any number of parameters to the method。

The following is an example of a list of operational dynamic parameters using variable parameters:

"false."　　I don't knowOkayDynamicparameterexample

　　I don't knowStaticI don't knowI'm sorrySprings

Dynamicparams()"param1");

Dynamicparams()"param1","param2");

Dynamicparams()"param1","param2","param3");

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　　I don't knowStaticI don't knowDynamicparams()Bring...Params)

Hey, system.I'm sorry" number of parameters: " +I don't know;

　　For (Not i =0; i params. Length; i++)

Hey, system.I'm sorryParameter + (i +)1) +" : +Params[i];

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In the above example, we define a method called dynamicparams, which uses variable parameters in the list of parameters. This means that the method can accept an arbitrary number of string type parameters。

In the main method, we used the dynamicparams method three times, passing different numbers of parameters. Within the dynamicparams method, we first output the number of parameters that are passed, then use the cycle to run through and output each parameter。

When the above code is implemented, the following output results will be obtained:

Number of parameters: 1

Parameter 1: param1

Number of parameters: 2

Parameter 1: param1

Parameter 2: param2

Number of parameters: 3

Parameter 1: param1

Parameter 2: param2

Parameter 3: param3

By using variable parameters, we can be flexible in transmitting an arbitrary number of parameters to the method, thus making it more universal and scalable。