Instantiate enum class

Question

Consider I am having the following enum class,

public enum Sample {
    READ,
    WRITE
}

and in the following class I am trying to test the enum class,

public class SampleTest {
    public static void main(String[] args) {
        testEnumSample(Sample.READ);
    }

    public static void testEnumSample(Sample sample) {
        System.out.println(sample);
    }
}

Here I am specifying Sample.READ then passing it as the parameter to the method testEnumSample. Instead if we want to instantiate the enum class and pass it as parameter what we need to do?

Answer 1

Here I need to specifying Sample.READ to pass it as parameter. Instead if we want to instantiate the enum class and pass it as parameter what we need to do?

What would "instantiate the enum class" even mean? The point of an enum is that there are a fixed set of values - you can't create more later. If you want to do so, you shouldn't be using an enum.

There are other ways of getting enum values though. For example, you could get the first-declared value:

testEnumSample(Sample.values()[0]);

or perhaps pass in the name and use Sample.valueOf:

testEnumSample("READ");

...

Sample sample = Sample.valueOf(sampleName);

If you explained what you were trying to achieve, it would make it easier to help you.