java - 如何在左边填充零的整数？(How can I pad an integer with zeros on the left?)

Question

How do you left pad an int with zeros when converting to a String in java?

(你怎么离开垫的int转换成时用零String在java吗？)

I'm basically looking to pad out integers up to 9999 with leading zeros (eg 1 = 0001 ).

(我基本上是希望用前导零填充最大9999整数（例如1 = 0001 ）。)

  ask by Omar Kooheji translate from so

Answer 1

Use java.lang.String.format(String,Object...) like this:

(像这样使用java.lang.String.format(String,Object...) ：)

String.format("%05d", yournumber);

for zero-padding with a length of 5. For hexadecimal output replace the d with an x as in "%05x" .

(用于长度为5的零填充。对于十六进制输出，将d替换为x如"%05x" 。)

The full formatting options are documented as part of java.util.Formatter .

(完整的格式设置选项作为java.util.Formatter一部分进行了说明。)