System.out.println(myName); http://stackoverflow.com/questions/6952363/java-replace-a-character-at-a-specific-index-in-a-string
1. 完整代码示例 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();charlastCha...
public String replace(char oldChar, char newChar); 1. Returns a string resulting from replacing all occurrences of {@code oldChar} in this string with {@code newChar}. If the character {@code oldChar} does not occur in the character sequence represented by this {@code String} object, t...
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...
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...
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. */
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....
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')); } }...