Home > Java > JavaBase > body text

How to implement java string formatting and add 0 if the length is insufficient

王林
Release: 2019-11-26 16:12:06
Original
5509 people have browsed it

How to implement java string formatting and add 0 if the length is insufficient

You can fill in the number of digits with one line of code, but if you can fill in the number of digits with one line of code, you need to fill in spaces in front of it, and if you want to fill in 0, you need an integer type, use The function you get is String.format, which can format integers, strings, dates, etc.

Recommended free learning videos: java free video tutorials

For example:

System.out.println(String.format(“%09d”, 123);
Copy after login

Output: 000000123

System.out.println(String.format(“%9s”, “123″);
Copy after login

Output: 123

The code is as follows:

System.out.println(String.format(“%09d”, Long.parseLong(“123″)));
Copy after login

Output: 000000123

The example code is as follows:

public static String addZeroForNum(String str, int strLength) {
    int strLen = str.length();
    if (strLen < strLength) {
        while (strLen < strLength) {
            StringBuffer sb = new StringBuffer();
            sb.append("0").append(str);// 左补0
            // sb.append(str).append("0");//右补0
            str = sb.toString();
            strLen = str.length();
        }
    }
    return str;
}
Copy after login

Recommended java related article tutorials: java quick start

The above is the detailed content of How to implement java string formatting and add 0 if the length is insufficient. For more information, please follow other related articles on the PHP Chinese website!

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!