('0'); } // 将原始字符串附加到末尾 sb.append(originalString); return sb.toString(); } public static void main(String[] args) { String originalString = "abc"; int targetLength = 10; String paddedString = leftPadWithZeros(originalString, targetLength); System.out.println(paddedString); /...
如果你倾向于手动处理,StringBuilder也可以实现左补零的功能。 publicclassMain{publicstaticvoidmain(String[]args){intnumber=7890;StringpaddedNumber=padLeftWithZeros(number,10);System.out.println(paddedNumber);// 输出 0000007890}publicstaticStringpadLeftWithZeros(intnumber,inttotalLength){StringBuildersb=newSt...
publicstaticStringleftPad(Stringinput,intlength,StringpadStr){if(input==null||padStr==null){returnnull;}if(input.length()>=length){returninput;}intpadLength=length-input.length();StringBuilderpaddedString=newStringBuilder();paddedString.append(padStr.repeat(padLength));paddedString.append(input);re...
String <-- NumberFormatter NumberFormatter : +formatNumber(int num): String 在类图中,我们定义了一个NumberFormatter类,其中包含一个formatNumber()方法用于将数字格式化为固定长度的字符串。 序列图 NumberFormatterClientNumberFormatterClientformatNumber(10)Convert number to stringPad with zeros"10" 在序列图中,...
fun Int.padWithZeros(): String { return this.toString().padStart(4, '0') } Share Improve this answer Follow answered Mar 4 at 16:02 Dr Adams 27444 silver badges88 bronze badges Add a comment -3 No packages needed: String paddedString = i < 100 ? i < 10 ? "00" + i : ...
Java String split() returns an array after splitting the string using the delimiter or multiple delimiters such as common or whitespace. Java String replaceAll() The String.replaceAll(regex, replacement) in Java replaces all occurrences of a substring matching the specified regular expression with th...
You can play with this code by changing each of these metadata to get a feel of it. For example, you can change the length to pad more or fewer zeros e.g.%06dwill always create aleft padded numeric String of six-digit. By the way, while usingString.format()method you must remember...
Left-justifying within the specified width: String.format("|%-20d|", 93); // prints: |93 | Pad with zeros: String.format("|%020d|", 93); // prints: |00000000000000000093| Print positive numbers with a “+”: (Negative numbers always have the “-” included): ...
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leftPad(Stringstr,intsize)rightPad(Stringstr,intsize)center(Stringstr,intsize)//Optional pad character in place of empty space. Useful in padding a number with zerosleftPad(Stringstr,intsize,charpadChar)rightPad(Stringstr,intsize,charpadChar)center(Stringstr,intsize,charpadChar) ...