Exception in thread, bound must be positive at java.util.random.nextInt and at main -

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as new beginner in java, having trouble text adventure game, , work on it, realized unable run it. have searched google, looked here, , found no answer how fix problem.

here's error:

exception in thread "main" java.lang.illegalargumentexception: bound must positive @ java.util.random.nextint(random.java:388) @ iproject.iproject.main(iproject.java:47)

and here code:

package iproject;  import java.util.random; import java.util.scanner;  /**  *  * @author twinbranch*/ public class iproject {  /**  *  * @param args  */ public static void main (string[] args) {  scanner in = new scanner(system.in); random rand = new random();   string[] enemies = {  }; int maxenemyhealth = 75; int enemyattackdamage = 25;   int health = 100;  int attackdamage = 50; int numhealthpots = 3; int healthpotionhealamount = 30; int healthpotiondropchance = 33; //percentage  boolean running = true; {  game: while (running) { system.out.println();  int enemyhealth = rand.nextint(maxenemyhealth); string enemy = enemies[rand.nextint(enemies.length)]; system.out.println("\t# " + enemy + "has appeared! #\n");

the second error: 

public int nextint(int bound) { if (bound <= 0) throw new illegalargumentexception(badbound);

i not want post whole code this, because take approximately 400 lines.

so, initial question is, know wrong code? errors making code.

the problem enemies.length zero.


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