Left padding a String with Zeros?

If your string contains numbers only, you can make it an integer and then do padding: String. Format("%010d", Integer. ParseInt(mystring)) If not I would like to know how it can be done Some answers in my question show who it can be done by replacing spaces by 0 s.

You can do that why if the string doesn't contain spaces.

If your string contains numbers only, you can make it an integer and then do padding: String. Format("%010d", Integer. ParseInt(mystring)); If not I would like to know how it can be done.

Some answers in my question show who it can be done by replacing spaces by 0s. You can do that why if the string doesn't contain spaces.

He never said it was a string representing a number... – Joeri Hendrickx Dec 17 '10 at 12:14 @Joeri He posted that example and for that case I mentioned the answers I got for my question and posted a link to my question. – khachik Dec 17 '10 at 12:17.

String str = "129018"; StringBuilder sb = new StringBuilder(); for (int toprepend=10-str. Length; toprepend>0; toprepend--) { sb. Append('0'); } sb.

Append(str); String result = sb.toString().

1 for being the only correct answer that doesn't use an external library – Joeri Hendrickx Dec 17 '10 at 12:15.

Org.apache.commons.lang.StringUtils. LeftPad("129018", 10, "0") the second parameter is the desired output length "0" is the padding char.

String str = "129018"; String str2 = String. Format("%10s", str). Replace(' ', '0'); System.out.

Println(str2).

This is a more round-about approach than the accepted answer. – Paul W May 26 at 12:49.

An old question, but I also have two methods. For a fixed (predefined) length: public static String fill(String text) { if (text.length() >= 10) return text; else return "0000000000". Substring(text.length()) + text; } For a variable length: public static String fill(String text, int size) { StringBuilder builder = new StringBuilder(text); while (builder.length() Append('0'); } return builder.toString(); }.

You may use apache commons StringUtils StringUtils. LeftPad("129018", 10, "0"); commons.apache.org/lang/api-2.3/org/apac....

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