Code:
String arr[] = {"0","a","b","c"};
String result = "";
for (int i = 0; i < arr.length; i++) {
for (int j = 0; j < arr.length; j++) {
for (int j2 = 0; j2 < arr.length; j2++) {
result += arr[i] + arr[j] + arr[j2] + " \n";
}
}
}
System.out.println(result);
:joker: