java empty a set code example

Example 1: java list to set

Set<Foo> foo = new HashSet<Foo>(myList);

Example 2: create an empty array in java

public static void main(String args[])
{
    int array[] = new int[4];
    int number = 5, i = 0,j = 0;
    while (i<4){
        array[i]=number;
        i=i+1;
    }
    while (j<4){
        System.out.println(array[j]);
        j++;
    }
}