Sorry if this question was made already, I've made a deep search and nothing.
Now, I know that:
String.format("%05d", price);
Will be padding my price with zeros to the left, so a price of 25 will result in 00025
What if I want to pad them to the right, so the result is 25000 ? How do I do that using only String.format patterns?
You could use:
String.format("%-5s", price ).replace(' ', '0')
Can I do this using only the format pattern?
String.format
uses Formatter.justify
just like the String.printf
method. From this post you will see that the output space is hard-coded, so using the String.replace
is necessary.
试试这个 :
String RightPaddedString = org.apache.commons.lang.StringUtils.rightPad(InputString,NewStringlength,'paddingChar');
Please try to read this doc, look if the library of apache commons StringUtils
can help you
I've made a code like this :
import org.apache.commons.lang3.StringUtils;
public static void main(String[] args) {
String str = "123";
str = StringUtils.leftPad(str,10,"0"); //you can also look the rightPad function.
System.out.println(str);
}
Credits to beginnersbook.com , this is a working solution for the problem:
public class PadRightTest {
public static void main(String[] argv) {
System.out.println("#" + rightPadZeros("mystring", 10) + "@");
System.out.println("#" + rightPadZeros("mystring", 15) + "@");
System.out.println("#" + rightPadZeros("mystring", 20) + "@");
}
public static String rightPadZeros(String str, int num) {
return String.format("%1$-" + num + "s", str).replace(' ', '0');
}
}
and the output is:
#mystring00@
#mystring0000000@
#mystring000000000000@
Use this function for right padding.
private String rightPadding(String word, int length, char ch) {
return (length > word.length()) ? rightPadding(word + ch, length, ch) : word;
}
how to use?
rightPadding("25", 5, '0');
In my case I solved this using only native Java.
StringBuilder sb = new StringBuilder("1234");
sb.setLength(9);
String test = sb.toString().replaceAll("[^0-9]", "0");
System.out.println(test);
So it printed out : 123400000
如果您想不使用格式或任何功能,请使用这个简单的技巧System.out.println(price+"000");
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