Is there any way to generate ID combined with alphabets in java?

Question

I have created a students registration project and I need to give registration number on my own for those who are registering in my website. My Registration Id should be ABC0000001 so on. I tried this following code to generate reg no.

 for(int i=0000001;i<3;i++){

  System.out.println("ABC"+i);

}

But I got output as ABC1 ABC2 ABC3. This is not needed. Please advice.

Answer 1

Numbers do not have significant leading zeros. (Never mind that the code actually uses an octal number literal in Java.)

See String.format and the Format Syntax . In particular, '0' flag , width modifier, and the 'd' (decimal integer) conversion are useful here.

for(int i=1; i<3; i++){
  // % - start of format
  // 0 - 0-pad the result
  // 7 - set result width to 7 characters wide
  // d - display as decimal integer
  String id = String.format("ABC%07d", i);
  System.out.println(id);
}

Answer 2

Do like this

for(int i=1;i<3;i++){

  System.out.println("ABC00000"+i);

}