How to count in java

How do you count words in Java?

Write a Java program to count the number of words in a string?

  1. public class WordCount {
  2. static int wordcount(String string)
  3. {
  4. int count=0;
  5. char ch[]= new char[string.length()];
  6. for(int i=0;i<string.length();i++)
  7. {
  8. ch[i]= string.charAt(i);

How do you add a count in Java?

The increment operator adds on to the value stored in the variable and stores the result within the variable.

  1. Define the variable that you will use to keep count. …
  2. Set the variable to the initial value from which you want to begin counting. …
  3. Use the increment operator, ++, to increase the value of your variable by one.

How many digits are in a number Java?

For the numbers represented in decimal form, if we take their log in base 10 and round it up then we’ll get the number of digits in that number: int length = (int) (Math. log10(number) + 1); Note that log100 of any number is not defined.

How do I count repeated words in a string in Java?


  1. public class DuplicateWord {
  2. public static void main(String[] args) {
  3. String string = “Big black bug bit a big black dog on his big black nose”;
  4. int count;
  5. //Converts the string into lowercase.
  6. string = string.toLowerCase();
  7. //Split the string into words using built-in function.
  8. String words[] = string.split(” “);

What is StringTokenizer in Java?

The java. util. StringTokenizer class allows an application to break a string into tokens. This class is a legacy class that is retained for compatibility reasons although its use is discouraged in new code. Its methods do not distinguish among identifiers, numbers, and quoted strings.

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What does count ++ do in Java?

4 Answers. count++ is post increment where ++count is pre increment. suppose you write count++ means value increase after execute this statement. but in case ++count value will increase while executing this line.

How do I convert a number to a string in Java?

Common ways to convert an integer

  1. The toString() method. This method is present in many Java classes. …
  2. String.valueOf() Pass your integer (as an int or Integer) to this method and it will return a string: …
  3. StringBuffer or StringBuilder. These two classes build a string by the append() method. …
  4. Indirect ways.

How do you count unique digits in Java?

To count unique digits in a given number N(for example, 1091 having three unique digits, 1,0 & 9, so the function should return 3) in java. Given a number N, for example, take 1091, here the count of digits is 4 but the count of unique digits is 3 ie 1,0 & 9 are unique (since 1 is repeated).

How do you count digits?

Logic to count number of digits in an integer

  1. Input a number from user. …
  2. Initialize another variable to store total digits say digit = 0 .
  3. If num > 0 then increment count by 1 i.e. count++ .
  4. Divide num by 10 to remove last digit of the given number i.e. num = num / 10 .
  5. Repeat step 3 to 4 till num > 0 or num !=

How do you find the first digit of a number?

To finding first digit of a number is little expensive than last digit. To find first digit of a number we divide the given number by 10 until number is greater than 10. At the end we are left with the first digit.

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How do you know if a number has the same number?

Given two integers A and B, the task is to check whether both the numbers have equal number of digits. Approach: While both the numbers are > 0, keep dividing both the numbers by 10. Finally, check if both the numbers are 0.

How do you count words in a string?


  1. Define a string.
  2. To counts the words present in the string, we will iterate through the string and count the spaces present in the string. …
  3. If a string starts with a space, then we must not count the first space as it is not preceded by a word.
  4. To count the last word, we will increment the count by 1.

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