CODEWITHSUNDEEP
javaarraysrandom
Fouzi Medfouni
Fouzi Medfouni

Reputation: 25

Random Obj and Array

Hi I have a snippt of my Homework ...and I am getting a different value from what I should be expecting here are my class variables

I have : seed ....(through scanner should be : 12345 -testing value so I get get the same results as my instructor-) LenghtOfArray ....(through scanner too) Final MAX = 8;

I didn't know how to coordonate within my code to get it to work

and I have the for loop :

Random Obj = new Random (seed);
int []myArray = new int [LengthOfArray];
for(int i = 0 ; i < myRandomArray.length ; i++) {
    myArray[i] = (int) Obj.nextLong();
    System.out.print(myArray[i] + "  ");
}
System.out.println();

Now I am missing MAX variable so my output should be :

4 4 6 0 4 4 7 0 7 6 5 6

but I get this :

-70013384 64862043 543438317 1940859862 924168001 1943285380 -62817581 -1920529480 541298859 -1439409345 520340403 -1293274375

so how can I enforce my code to get the out come in the range of my MAX (which is < 8)

Upvotes: 1

Views: 53

Answers (3)

Grant Wanderscheid
Grant Wanderscheid

Reputation: 1

Length of your array should be 12, not 8. Then to get a number between 0 and 8 to store in your array use

Obj.nextInt(9);

Upvotes: 0

Elliott Frisch
Elliott Frisch

Reputation: 201409

If I understand your question, first define MAX -

final int MAX = 8;

And use Random.nextInt(int) to specify the maximum value (exclusive, so 0 - MAX-1) like

myArray[i] = Obj.nextInt(MAX);

Finally, you should really rename your Random instance (Obj is both a bad variable name and poorly capitalized per Java's naming conventions - variables start with a lower case letter). In Java 8+, you might also use IntStream and lambdas to write it like

Random rand = new Random();
int lengthOfArray = 10;
final int MAX = 8;
int[] myArray = IntStream.generate(() -> rand.nextInt(MAX)) //
        .limit(lengthOfArray).toArray();
System.out.println(IntStream.of(myArray).mapToObj(String::valueOf) //
        .collect(Collectors.joining(" ")));

Upvotes: 2

Naman
Naman

Reputation: 31868

You probably are looking for nextInt(int n) method from the Random class which can be used as:

myArray[i] = obj.nextInt(9); //including 8 and 0

PS: obj here is your Obj, just that I prefer following camelCase convention.

Upvotes: 2

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