使用String.format方法: 这是最常见且简单的方法之一,特别适用于需要在字符串左侧补零的情况。 java public static String padLeftWithZeros(int number, int totalLength) { return String.format("%0" + totalLength + "d", number); } // 示例 System.out.println(padLeftWithZeros(123, 5)); // 输出...
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...
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...
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,...
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...
String.format("%d", 93); // prints 93 Specifying a width: String.format("|%20d|", 93); // prints: | 93| Left-justifying within the specified width: String.format("|%-20d|", 93); // prints: |93 | Pad with zeros: String.format("|%020d|", 93); // prints: |000000000000000...
public boolean endsWith(String suffix) JavaString endsWith()方法示例 在下面的例子中,我们有两个字符串str1和str2,我们正在检查字符串是否以指定的后缀结尾。 publicclassEndsWithExample{publicstaticvoidmain(String args[]){Stringstr1=newString("This is a test String");Stringstr2=newString("Test ABC"...
Pad a String with Zeros or Spaces in Java Learn how to pad a String in Java with a specific character. Read more→ 2. Syntax We can use one of thesePrintStreammethods to format the output: System.out.printf(format, arguments); System.out.printf(locale, format, arguments); ...
1 String.format("%d", 93); // prints 93 Specifying a width: 1 String.format("|%20d|", 93); // prints: | 93| Left-justifying within the specified width: 1 String.format("|%-20d|", 93); // prints: |93 | Pad with zeros: 1 String.format("|%020d|", 93); // prints...
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) ...