count occurrences of character in string java 8
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);check how many of a word is in a string
function countOccurences(str,word)
{
// split the string by spaces in a
String a[] = str.split(",");
// search for pattern in a
int count = 0;
for (int i = 0; i < a.length; i++)
{
// if match found increase count
if (word.equals(a[i]))
count++;
}
return count;
}find number of occurrences of a substring in a string java
public static int count(String str, String target) {
return (str.length() - str.replace(target, "").length()) / target.length();
}count the number of occurrences of a character in a string java
String line = "apples.oranges.bananas";
int count = line.length() - line.replace(".", "").length();
System.out.println(count);//displays 2how to count words in string in java
String str = "I am happy and why not
and why are you not happy and you should be";
String [] arr = str.split(" ");
Map<String, Integer> map = new HashMap<>();
for (int i=0 ; i < arr.length ; i++){
if (!map.containsKey(arr[i])){
map.put(arr[i],1);
} else{
map.put(arr[i],map.get(arr[i])+1);
}
}
for(Map.Entry<String, Integer> each : map.entrySet()){
System.out.println(each.getKey()+" occures " + each.getValue() + " times");
}Copyright © 2021 Codeinu
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