// generate the name of a random fruit.
import java.util.Random;

// ...

static final Random wheel = new Random();
static final String[] fruits = { "peach", "orange", "cherry", "pineapple", "guava" };

// ...

// count how many possible fruits there are: 5 numbered 0..4.
int n = fruits.length;

// generate a random number =  0..4 which picks one of the 5 fruits.
int r = wheel.nextInt( n );

// turn that number into the name of a random fruit.
String fruit = fruits[ r ];