#2: How to count character Occurrence in a given String | Java interview Program for testers

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[PrasadPoojar-mk]

public class A {

public static void main(String[] args) {
String str="Java is object oriented language";
int count=0;
for (int i = 0; i < str.length()-1; i++) {

if (str.charAt(i)=='a') {

}
}
System.out.print(count);
}
}

[olenakhomenko]

Get count for specific character and for all characters need only to remove filter condition:
List<String> characters = Arrays.asList(str.split(""));
Map<String, Long> map = characters.stream()
.filter(s -> s.equalsIgnoreCase("a"))
-> i, Collectors.counting()));

[nikhilmucharla]

The simple way is :
String str = "character Occurrence in a given String";

long result =

System.out.println(result);

[christenajacoub]

We need to use the toLowerCase since if we can search with 'j' it will discard the J in "Java" Word, giving the wrong count in this case

public class Occurrence {
public static void main(String[] args) {
String str="Java is Object oriented language";
char neededLetter= 'j';
int count=0;
for(char
if(letter==neededLetter)
count ++;
}
System.out.println("The character "+neededLetter+" is having: "+count);

}

[sunil_gowda]

how to count all the character count? i mean all the letters with its count ?