How to get random known numbers in java

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Hello everybody!

im new in java and i got trouble with random in java.

i have list of data numbers:

1120,2014,3741,4563

and i want make random with these 4 numbers, but just random one of them.

ex: 3741.

i jave try this code:

Java

private static int skills;
	private static int getSkills() {
		switch(Rnd.get(skills)) {
		case 1120:
			skills= 1120;
			break;
		case 2014:
			skills= 2014;
			break;
                case 3741:
			skills= 3741;
			break;
		}
		return skills;
	}

Posted 3-Sep-14 2:22am

EADever

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[no name] 3-Sep-14 8:36am

please specify your problem in brief

3 solutions

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CPallini · Answer 1 · 2014-09-03T03:03:00

Put your data numbers inside an array, randomly select the array index and finally pick the array item corresponding to the selected index.
If you need to pick a different number at each extraction, then have a look at my tip: "Random extraction of 5 cards from a deck"[^] (I know it is C++, but here just the algorithm matters).

kjburns1980 · Answer 2 · 2014-09-04T06:29:00

Solution 3

Java

public int getRandom() {
  int[] numbers = {1120,2014,3741,4563};
  Random rnd = new Random();
  int index = (int)(rnd.nextDouble() * 4.);
  return numbers[index];
}

Posted 4-Sep-14 6:29am

kjburns1980

EADever · Answer 3 · 2014-09-03T02:43:00

Solution 1

i have a idea like this:

Java

private static final int[] skills = { 
		13016,
		13026,
	}; 

	private static int getSkillsForWeapon() {
		return Rnd.get(skills);
	}

this code will random one of two skills value?

Posted 3-Sep-14 2:43am

EADever

How to get random known numbers in java

3 solutions

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