Get Each Character Count From String/Line In Java | Java Basics

#JavaInspires

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 Hi Guys,

Welcome to Java Inspires.😀

In this post, we will see how to get each character count from a string.

Here, we will take a string and convert to char array. Then we iterate over char array and put each character count in map. Here is the code.

JavaBasicExample.java

package com.javainspires;

import java.util.HashMap;
import java.util.Map;

/**
 * 
 * @author Java Inspires
 *
 */
public class JavaBasicExample {

	public static void main(String[] args) {

		// take a string
		String testStr = "AADDDFFGGGGGGGUUFZZZZZZZZZZZZZZ";
		// convert string to char array
		char[] chararr = testStr.toCharArray();
		// take a map to store char count
		Map<Character, Integer> charCount = new HashMap<Character, Integer>();

		// iterate over char array
		for (char c : chararr) {
			// check for char in map
			if (charCount.containsKey(c)) { // if avaialble
				// get count and increment by 1
				int count = charCount.get(c);
				charCount.put(c, count + 1);
			} else {
				// put char in map with count 1
				charCount.put(c, 1);
			}
		}
		// print count map
		System.out.println(charCount);
	}

}

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Output:

{A=2, D=3, U=2, F=3, G=7, Z=14}

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