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count occurrences of character in string java 8

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Talented Toucan answered on June 17, 2020 Popularity 10/10 Helpfulness 4/10

answer count occurrences of character in string java 8

related Java Program to Count the Number of Occurrences of Substring in a String

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count occurrences of character in string java 8

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String someString = "elephant";
long count = someString.chars().filter(ch -> ch == 'e').count();
assertEquals(2, count);
 
long count2 = someString.codePoints().filter(ch -> ch == 'e').count();
assertEquals(2, count2);

Popularity 10/10 Helpfulness 4/10 Language java

Source: www.baeldung.com

Tags: character count java java-8 string

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Contributed on Jun 17 2020

Talented Toucan

0 Answers Avg Quality 2/10

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Java Program to Count the Number of Occurrences of Substring in a String

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package com.javaguides.strings.examples;

/**
 * 
 * Java program to count number of occurrence of substring in given string.
 * @author javaguides.net
 * 
 */
public class CountOccuranceOfSubString {

    public static void main(String[] args) {
        int count = countOccurrencesOf("javadevelopersguides", "java");
        System.out.println("Count number of occurrences of substring 'java' " +
            " in string 'javadevelopersguides' : " + count);
        int count1 = countOccurrencesOf("javajavaguides", "java");
        System.out.println("Count number of occurrences of substring 'java'" +
            "  in string 'javajavaguides' : " + count1);
    }

    public static boolean hasLength(String str) {
        return (str != null && !str.isEmpty());
    }

    /**
     * Count the occurrences of the substring {@code sub} in string {@code str}.
     * @param str string to search in
     * @param sub string to search for
     */
    public static int countOccurrencesOf(String str, String sub) {
        if (!hasLength(str) || !hasLength(sub)) {
            return 0;
        }

        int count = 0;
        int pos = 0;
        int idx;
        while ((idx = str.indexOf(sub, pos)) != -1) {
            ++count;
            pos = idx + sub.length();
        }
        return count;
    }
}

Popularity 8/10 Helpfulness 3/10 Language java

Source: www.javaguides.net

Tags: count java j

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Contributed on Dec 17 2022

Deepika Sahu

0 Answers Avg Quality 2/10

count the number of occurrences of a character in a string java

Comment

String line = "apples.oranges.bananas";
int count = line.length() - line.replace(".", "").length();
System.out.println(count);//displays 2

Popularity 10/10 Helpfulness 3/10 Language java

Source: stackoverflow.com

Tags: character char

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Contributed on May 31 2021

Successful Shrike

0 Answers Avg Quality 2/10

count the occurrences of strings in java

Comment

main(){
    String[] array ={"a","ab","a","abc","abc","a","ab","ab","a"};
    Map<String,Integer> hm = new HashMap();

    for(String x:array){

        if(!hm.containsKey(x)){
            hm.put(x,1);
        }else{
            hm.put(x, hm.get(x)+1);
        }
    }
    System.out.println(hm);
}

Popularity 7/10 Helpfulness 2/10 Language java

Source: Grepper

Tags: count java

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Contributed on Apr 14 2023

Super Sloth

0 Answers Avg Quality 2/10

java string count occurrences of substring

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public class SubstringOccurrenceCounter {
    public static int countOccurrences(String string, String substring) {
        int count = 0;
        int index = 0;

        while (index != -1) {
            index = string.indexOf(substring, index);
            if (index != -1) {
                count++;
                index += substring.length();
            }
        }

        return count;
    }

    public static void main(String[] args) {
        String string = "Java is awesome and Java is powerful";
        String substring = "Java";
        int occurrenceCount = countOccurrences(string, substring);

        System.out.println("Number of occurrences: " + occurrenceCount);
    }
}

Popularity 6/10 Helpfulness 1/10 Language java

Source: Grepper

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Contributed on Sep 12 2023

YOU.com

0 Answers Avg Quality 2/10

count occurrences of character in string java 8

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count occurrences of character in string java 8

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Java Program to Count the Number of Occurrences of Substring in a String

count the number of occurrences of a character in a string java

count the occurrences of strings in java

java string count occurrences of substring

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