java - 如何在java中向用户显示选定的数组内容？

Question

I have created a random number generator and I also have an array of 30 items, however I require it to use the numbers generated to get the positions of the items in the array and display it. Sorry if I don't make much sense, I'm still trying to understand it myself!

Here's my random number generator code!

public void passRndNum() throws IOException

    ArrayList <Integer> aNumber = new ArrayList <Integer>();

    for (int i = 0; i < 29; i++)
    {
        aNumber.add(new Integer(i));
    }
    Collections.shuffle(aNumber);
    for (int i = 0;i < 2 ; i++)
    {
        aPlayer[i].receiveCard(aNumber.get(i));
    }

}

Answer 1

Is it possible to create random number between 0 and 29

Yes.

Random rnd = new Random();
rnd.nextInt(30);

to represent a counter

Yes.

int counter = rnd.nextInt(30);

of an array of 30 items

Yes, you can have an array of 30 items. Lets call it ... myArray .

and then call that counter and item to the display?

Yes.

System.out.println(counter + ": " + myArray[counter]);