publicclassMain{publicstaticvoidmain(String[]args){Stringstr="Hello, World!";chartargetChar='o';intlastIndex=str.lastIndexOf(targetChar);if(lastIndex==-1){System.out.println("字符 '"+targetChar+"' 未在字符串中找到。");}else{System.out.println("字符 '"+targetChar+"' 最后一次出现的位置...
string strset = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; int first = strinfo.find_first_of(strset); if (first == string::npos) { cout << "not find any characters" << endl; return -1; } int last = strinfo.find_last_of(strset); if (last == string::npos) { cout ...
Java之StringFind packageDemo_1_22_String;publicclassStringFind {publicstaticvoidmain(String[] args) { String str= "www.ccc.com"; String str1= "**@@www.ccc.com##"; System.out.println(str.contains("ccc"));//true 表示字符串存在System.out.println(str.contains("aa"));//false 表示字符...
java public class Main { public static void main(String[] args) { char charToFind = 'a'; String str = "Hello, how are you? I hope you are fine."; // 找到字符最后一次出现的位置 int lastIndex = str.lastIndexOf(charToFind); // 检查字符是否出现 if (lastIndex != -1) { // 截...
一、String基本操作方法 首先说一下基本操作方法,字符串的基本操作方法中包含以下几种: (1)获取字符串长度length() (2)获取字符串中的第i个字符charAt(i) (3)获取指定位置的字符方法getChars(4个参数) 1、 获取字符串长度方法length() 格式:int length = str.length(); ...
编写一个简单的 Java 程序,演示 lastIndexOf() 方法查找字符串的用法,并输出结果。代码如下: public static void main(String[] args) { String words=”today,monday,Sunday”; System.out.println(“原始字符串是'”+words+”‘”); System.out.println(“lastIndexOf(\”day\”)结果:”+words.lastIndex...
findLast(findLastIndex)/find(findIndex)|findAny/findFirst 查找 查找元素:返回当前流的任意元素。 java findAny()方法返回当前流的任意元素 findFirst()方法返回当前流的第一个元素。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6); Syste...
This is a substring example. // 3. 提取从索引7开始，长度为5的子字符串 String substring3 = originalString.substring(7, 12); System.out.println(substring3); // 输出: World // 4. 提取最后一个单词 int lastIndex = originalString.lastIndexOf(" "); String substring4 = originalS...
string.lastIndexOf(intch,intindex) or string.lastIndexOf(string str,intindex) lastIndexOf() Parameters To find the last index of a character,lastIndexOf()takes these two parameters: ch- the character whose last index is to be found ...
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