下面是完整的代码示例,展示了如何实现“java string替换最后一个字符”: importjava.util.Scanner;publicclassReplaceLastCharacter{publicstaticvoidmain(String[]args){Scannerscanner=newScanner(System.in);System.out.println("请输入原始字符串:");StringoriginalString=scanner.nextLine();charlastChar=originalString.ch...
=-1){StringreplacedString=originalString.substring(0,lastIndex)+'X'+originalString.substring(lastIndex+1);System.out.println("Original String: "+originalString);System.out.println("Replaced String: "+replacedString);}else{System.out.println("Character not found in the string.");}}}...
从该方法中,我们可以看到,该方法中是一直循环直至find()返回false,每一次find匹配到换行(我们调用String.replaceAll时传入的匹配字符串是”\n”)都会执行appendReplacement方法,那么这个家伙到底做了什么呢? 1publicMatcher appendReplacement(StringBuffer sb, String replacement) {23//If no match, return error4if(f...
public void replaceFirst(String string) { System.out.println(string.replaceFirst("\\d{2}", "--")); System.out.println(string.replace("\\d{2}", "--")); System.out.println(string.replace("29", "--")); System.out.println(string.replaceAll("\\d{2}", "--")); } // year = ...
1. Delete Last Character usingStringBuffer.deleteCahrAt() ThedeleteCharAt()method is a member of theStringBufferclass which deletes a character at a specified index. publicStringBufferdeleteCharAt(intindex) In the following example, we have a string “Hello, World!” and we are using theString...
replace各个方法的定义 一、replaceFirst方法 publicStringreplaceFirst(String regex, String replacement){returnPattern.compile(regex).matcher(this).replaceFirst(replacement); } 二、replace方法 publicStringreplace(CharSequence target, CharSequence replacement){returnPattern.compile(target.toString(), Pattern.LITERAL...
The index of the first character is 0, while the index of the last character is length()-1. For example, the following code gets the character at index 9 in a string: String anotherPalindrome = "Niagara. O roar again!"; char aChar = anotherPalindrome.charAt(9); Indices begin at 0...
true如果字串是空的,或只Character#isWhitespace(int) white space包含程式代碼點,則傳回 ,否則false為。 IsEmpty true如果 為 ,則傳回 ,且只有在 為時 #length()0。 JniIdentityHashCode 類別String 代表字元字串。 (繼承來源 Object) JniPeerMembers 類別String 代表字元字串。 PeerReference 類別String ...
long l) Inserts the string representation of the long argument into this sequence. StringBufferinsert(int offset, Object obj) Inserts the string representation of the Object argument into this character sequence. StringBufferinsert(int offset, String str) Inserts the string into this character sequenc...
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