Question

/**
 * Testing Arrays
 * @author N002213F
 * @version 1.0
 */
public class JavaArrays {

    public void processNames(String[] arg) {
        //-- patented method, stop, do not read ;)
    }

    public void test() {

        // works fine
        String[] names1 = new String[] { "Jane", "John" };
        processNames(names1);

        // works fine, nothing here
        String[] names2 = { "Jane", "John" };
        processNames(names2);

        // works again, please procced
        processNames(new String[] { "Jane", "John" });

        // fails, why, are there any reasons?
        processNames({ "Jane", "John" });

        // fails, but i thought Java 5 [vargs][1] handles this
        processNames("Jane", "John");
    }
}

Answer 1

processNames({ "Jane", "John" });

This fails, why, are there any reasons?

You didn’t specify a type. Java doesn’t do type inference here; it expects you to specify that this is a string array. The answers to this question may help for this, too

processNames("Jane", "John"); 

This fails too, but I thought Java 5 varargs handles this

If you want varargs, then you should write your method as such:

public void processNames(String... arg)

Note the ... instead of []. Just accepting an array doesn’t entitle you to use varargs on that method.