publicclassStringReplacement{publicstaticStringreplaceAt(Stringoriginal,Stringreplacement,intindex){if(index<0||index>=original.length()){thrownewIndexOutOfBoundsException("Index is out of bounds.");}// 如果替换的位置正好在字符串的起始处if(index==0){returnreplacement+original.substring(replacement.leng...
publicclassStringReplaceExample{publicstaticvoidmain(String[]args){Stringstr="Hello, World!";intindex=7;charreplacement='J';StringReplaceExampleexample=newStringReplaceExample();if(example.isValidIndex(str,index)){StringreplacedStr=example.replaceCharAtIndex(str,index,replacement);System.out.println("Or...
方法/步骤 1 反斜杠：\\ 斜杠：/public static void main(String[] args) {String fileUrl="/pdf/test.pdf";fileUrl= fileUrl.replace("/", "\\");System.out.println("fileUrl "+fileUrl);}在fileurl用反斜杠替换旧的斜杠 2 运行结果如图，(/)斜杠替换成一个反斜杠(\) ，由于反斜杠是转义符号...
packagecn.juwatech.string;publicclassStringMethods{publicstaticvoidmain(String[] args){Stringstr="Hello, World!";// 获取字符串长度intlength=str.length(); System.out.println("Length: "+ length);// 获取特定位置的字符charcharAt=str.charAt(1); System.out.println("Char at index 1: "+ charAt...
System.out.println("Character at index 3: " + ch);// 根据字符串获取索引int index = buffer.indexOf("World"); System.out.println("Index of 'World': " + index); } } 3)StringBuilder方法 与StringBuffer基本一样的方法,但它不是线程安全。单线程中推荐使用。文档及使用代码可以参考上面StringBuffe...
privatevoidset(ThreadLocal<?>key,Object value){// We don't use a fast path as with get() because it is at// least as common to use set() to create new entries as// it is to replace existing ones, in which case, a fast// path would fail more often than not.Entry[]tab=table...
// annotations/PasswordUtils.javaimportjava.util.*;publicclassPasswordUtils{@UseCase(id=47,description="Passwords must contain at least one numeric")publicbooleanvalidatePassword(String passwd){return(passwd.matches("\\w*\\d\\w*"));}@UseCase(id=48)publicStringencryptPassword(String passwd){return...
public String replace(char oldChar, char newChar) { if (oldChar != newChar) { int ...
这个字符串用newString代替原始字符串中所有的oldString。可以用String或StringBuilder对象作为CharSequence参数。 String replace(CharSequence oldString, CharSquence newString) 14、返回一个新字符串。这个字符串包含原始字符串中从beginIndex到串尾或endIndex -1 的所有代码单元。
String sanjose = original.replaceAll("paloalto\\", "sanjose\\"); System.out.println("backgammon = " + sanjose);梦里花落0921 浏览339回答33回答 跃然一笑 replace对你replaceAll有用,使用正则表达式,\\是特殊字符的前缀,比如\\s空格,\\.任何字符等。String test = "paloalto\\paloalto\\";test ...