How i can print the array per coloms

I tried to print an array with random numbers from 100 to 500 by using System.out.print(); but nothing has shown and when I tried using println it wasn't organized. So, how can I organize it to print 10 elements per row by using System.out.println();

And also, when I return the array it returns the location like [I@7de26db8, how I can fix that?

public int [] randomS() {
    Random rand = new Random();
    int a[] = new int[10000];
    
    for(int i=0; i<a.length; i++)
    {
        
        a[i] = rand.nextInt(500-100)+100;
        
        System.out.print(a[i]+" ");
    }
    
    return a;
    
}