w3resource

Java String Exercises: Check whether a specified character is happy or not

Java String: Exercise-87 with Solution

Write a Java program to check whether a specified character is happy or not. A character is happy when the same character appears to its left or right in a string.

Sample Solution:

Java Code:

import java.util.*;
public class Main
{
public boolean aCharacterIsHappy(String stng) 
{
  int l = stng.length();
  boolean char_happy = true;
  for (int i = 0; i < l; i++) 
  {
    if (stng.charAt(i) == 'z') 
	{
      if (i > 0 && stng.charAt(i-1) == 'z')
        char_happy = true;
      else if (i < l-1 && stng.charAt(i+1) == 'z')
        char_happy = true;
      else
        char_happy = false;
    }
  }
  return char_happy;
}
public static void main (String[] args)
    {
      Main m= new Main();
      String str1 =  "azzlea";
      System.out.println("The given string is: "+str1);
      System.out.println("Is Z happy in the string: "+m.aCharacterIsHappy(str1));
	  }
}

Sample Output:

The given string is: azzlea
Is z happy in the string: true

The given string is: azmzlea
Is z happy in the string: falses

Pictorial Presentation:

Java String Exercises: Check whether a specified character is happy or not

Flowchart:

Flowchart: Java String Exercises -Check whether a specified character is happy or not.

Java Code Editor:


Improve this sample solution and post your code through Disqus

Previous: Write a Java program to count the number of triples (characters appearing three times in a row) in a given string.
Next: Write a Java program to return a string where every appearance of the lowercase word 'is' has been replaced with 'is not'.

What is the difficulty level of this exercise?



Java: Tips of the Day

Parsing dates:

import java.io.*;
import java.util.*;
import java.text.*;

String s = "2001/09/23 14:39";

SimpleDateFormat formatter = new SimpleDateFormat ("yyyy/MM/dd H:mm");
Date d = formatter.parse(s, new ParsePosition(0));