The indexOf() method in java is a specialized function to find the index of the first occurrence of a substring in a string. This method has 4 overloads.
String son = scanner.nextLine(); int num = wordCount(string, son); System.out.println(son + "在字符串中出现的次数:" + num); } public static int wordCount(String str, String word) { int count = 0; while (str.contains(word)) { count++; str = str.substring(str.indexOf(word) + ...
The substring "lo" appears 2 times in the string. 1. 3. 使用正则表达式计数字符串 除了上述方法,我们还可以使用正则表达式来计数字符串中特定字符或子字符串的出现次数。Java中的Pattern和Matcher类提供了正则表达式的支持。 下面是一个示例代码,该代码使用正则表达式计算字符串中字符’d’的出现次数。 importja...
Today, I am going to share with you Java interview questions from Google, which were asked to one of my readers during the telephonic round. How do you count the number of words in a given String in Java? You can count words in Java String by using the split() method of String. A...
//C# - Count Vowels in a String.usingSystem;classDemo{staticintCountVowels(stringstr){inti=0;intcountVowels=0;for(i=0;i<str.Length;i++){if((str[i]=='a'|| str[i]=='e'|| str[i]=='i'|| str[i]=='o'|| str[i]=='u')||(str[i]=='A'|| str[i]=='E'|| str[i]...
Note:Index in Python starts from 0, not 1. count() Return Value count()method returns the number of occurrences of the substring in the given string. Example 1: Count number of occurrences of a given substring # define stringstring ="Python is awesome, isn't it?"substring ="is" ...
substring = "Welcome" count = len(re.findall(substring, string)) # Example 5: Count occurrences of acharacter in multiple strings array of strings = ["Python", "Java", "Spark","Pandas"] character_to_count = "a" count = sum(string.count(character_to_count) for string in strings) ...
# count vowels in a string# declare, assign stringstr="Hello world"# declare countcount=0# iterate and check each characterforiinstr:# check the conditions for vowelsif( i=="A"ori=="a"ori=="E"ori=="e"ori=="I"ori=="i"ori=="O"ori=="o"ori=="U"ori=="u"): count+=1# pr...
import java.io.File; import java.io.FileWriter; /** * This class is used to test the performance of the method for getting how *** **/ public class CountSubString { public static void main(String[] args) throws Exception{ CountSubString count = new CountSubString(); ...
public class WordCount {public static void main (String args[]){String randomText = "The sky is blue it meets the sea which is also blue";String text = "blue";int times = 0;for (int i = 0; i < randomText.length(); i++) {if (randomText.substring(i).startsWith(text)) { ...