Add leading zeroes to a string [duplicate]

Answer 1

Using DecimalFormat:

static public void main(String[] args) {
    int vals[] = {123, 1243, 123456, 12345678};
    DecimalFormat decimalFormat = new DecimalFormat("00000000");
    for (int val : vals) {
        System.out.println(decimalFormat.format(val));
    }
}

Output:

00000123
00001243
00123456
12345678