static String[] names = new String[100];
    static int[] phonenumber = new int[100];
    public static void main(String[] args){

        for(int i = 0; i < 100;i++){
            names[i] = createRandomName();
            phonenumber[i] = createRandomPhoneNumber();
            System.out.println(names[i]+'\t'+phonenumber[i]);
        }
    }

    private static int createRandomPhoneNumber() {
        String nr="";
        Random r = new Random();
        char[] nrs = {'1','2','3','4','5','6','7','8','9','0'};
        for(int i = 0; i < 8; i++){
            nr = nr + nrs[r.nextInt(10)];
        }
        return Integer.parseInt(nr);
    }

    private static String createRandomName() {
        String name="";
        Random r = new Random();
        char[] letters = {'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','f','z'};
        for(int i = 0; i < r.nextInt(10)+4; i++){
            name = name + letters[r.nextInt(letters.length-1)];
        }
        return name;
    }