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...
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 = ...
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...
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 ...
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...
The replace() method replaces each matching occurrence of a character/text in the string with the new character/text. Example class Main { public static void main(String[] args) { String str1 = "bat ball"; // replace b with c System.out.println(str1.replace('b', 'c')); } }...
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. */
对于 Java 初学者， 对于 String 是不可变对象总是存有疑惑。例如如下代码：Strings="ABCabc";System....