Here is one way you could do it in Java: public static int countChar(String str, char c) { int count = 0; for (int i = 0; i < str.length(); i++) { if (str.charAt(i) == c) { count++; } } return count; } You can use this method like this: String str ...
import java.util.Scanner; public class CharNum { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.println("请输入一个字符串:"); String string = scanner.nextLine(); System.out.println("请输入要查找的单词:"); String son = scanner.nextLine();...
Some developers may prefer to use core Java. There are many ways for counting the number of occurrences of a char in a String. Let’s start with a simple/naive approach: StringsomeString="elephant";charsomeChar='e';intcount=0;for(inti=0; i < someString.length(); i++) {if(someStr...
@Test public void givenString_whenUsingLooping_thenVerifyCounts() { Map<Character, Integer> charCount = new HashMap<>(); for (char c : str.toCharArray()) { charCount.merge(c, 1, Integer::sum); } assertEquals(3, charCount.get('a').intValue()); } In the test method, we first i...
{//Input the stringSystem.out.println("Enter the string!");Strings=Kb.next();//counter to count the number of vowels in a stringintvowels=0;for(inti=0;i
Java Strings 类 copyValueOf(data, offset, count) 方法将返回一个字符串,该字符串表示指定数组中的字符序列。 语法 public static String copyValueOf(char[] data, int offset, int count) 参数 data - 字符数组。 offset - 子数组的初始偏移量。 count - 子数组的长度。 返回值 此方法返回一个字符串...
//package com.java2s; // Released under the Apache License, Version 2.0 public class Main { /**/* ww w .j ava 2 s .co m*/ * Returns the number of times sub occurs in str * @param str * @param sub * @return */ public static int countMatches(String str, String sub) ...
String line; do { line = in .readLine(); if (line != null) { numChar += line.length(); numWords += wordcount(line); numLine++; } } while (line != null); System.out.println("File Name: " + fName); System.out.println("Number of characters: " + numChar);...
#include <string.h> voidmain() { chars[200]; intcount=0,i; printf("Enter the string:\n"); scanf("%[^\n]s",s); for(i=0;s[i]!='\0';i++) { if(s[i]==' '&&s[i+1]!=' ') count++; } printf("Number of words in given string are: %d\n",count+1); ...
java.lang.Character.charCount()是java中的内置函数,用于确定表示指定字符所需的字符数。如果字符等于或大于0x10000,则方法返回2,否则返回1。 用法: public static intcharCount(int code) 参数:该函数接受单个参数代码。它代表测试的字符。 返回值:如果字符有效,则返回2,否则返回1。