How to code for generate multiple sets of random number?

Question

How to code if the sets of random numbers can be indicated by users? I am now having java program for generating one set of random numbers, I want to add the function that I can indicate how many sets of random numbers generated. How can I do? Please help.

int[] numberSet = new int[6];
int   randomNumber;
boolean duplicate;
//input


//processing
for (int i=0; i<numberSet.length; i++){
    duplicate = false;
    randomNumber = generateRandomValue();
    
    


//output
System.out.println("The numbers for the set : ");
for (int i=0; i<numberSet.length; i++){
    if(i==(numberSet.length-1)){
        System.out.print( numberSet[i]);
    }
    else{
        System.out.print( numberSet[i] + ", ");
    }
    
}

System.out.println("");
}



public static int generateRandomValue(){
return (int) (Math.random()*49) + 1 ;
}

Answer 1

You could do some thing like this :

    public static int[] generateRandomValueSet(int n){
       Set<Integer> set = new HashSet();
       while(set.size() < n ){
          set.add( (int) (Math.random()*49) + 1);
       }
    
       int[] arr = new int[n];
       int index = 0;
       for(Integer x :set ){
        arr[index++] = x;
       }
       return arr;
    }