System.out.println(myName); http://stackoverflow.com/questions/6952363/java-replace-a-character-at-a-specific-index-in-a-string
在 Java 中,可以使用StringBuilder或StringBuffer类来动态修改字符串。 publicstaticStringreplaceCharacter(StringoriginalString,charreplaceChar){// 创建 StringBuilder 对象,用于存储替换后的字符串StringBuilderreplacedString=newStringBuilder();// 此处将替换字符添加到新的字符串中// ...// 返回替换后的字符串returnre...
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.charAt(originalString.length()-1);char[]charArray=originalString.toCharArr...
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 = ...
在某些情况下,Java编译器会自动创建一个Character对象。 例如,将一个char类型的参数传递给需要一个Character类型参数的方法时,那么编译器会自动地将char类型参数转换为Character对象。 这种特征称为装箱,反过来称为拆箱。 //原始字符 'a' 装箱到 Character 对象 ch 中Character ch = 'a';//原始字符 'x' 用 test...
// Program to replace the + characterclassMain{publicstaticvoidmain(String[] args){ String str1 ="+a-+b";// replace "+" with "#" using replaceAll()// need to escape "+" System.out.println(str1.replaceAll("\\+","#"));// #a-#b ...
Return a new string where all "l" characters are replaced with "p" characters: String myStr = "Hello"; System.out.println(myStr.replace('l', 'p')); Try it Yourself » Definition and UsageThe replace() method searches a string for a specified character, and returns a new string whe...
方法1 加号 “+” 拼接 和 方法2 String contact() 方法 的时间和空间成本都很高(分析在本文末尾),不能用来做批量数据的处理。 源代码,供参考 代码语言:javascript 代码运行次数:0 运行 AI代码解释 packagecnblogs.twzheng.lab2;/** * */importjava.util.ArrayList;importjava.util.List;importorg.apache.commo...
要理解String的不可变性,首先看一下String类中都有哪些成员变量。 在JDK1.6中,String的成员变量有以下几个: public final class String implements java.io.Serializable, Comparable, CharSequence { /** The value is used for character storage. */
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...