JavaStringWonders

Example Count for same type of character in String using array :

public class countAlphabets{
   
    public static void main(String[] args){
          
          char[] chars = "Hello World".toLowerCase().toCharArray();
          int[] count = new int[26];
          for(int i = 0; i< chars.length;i++)
          {
            if(chars[i] <= 122 && chars[i] >= 97)
             {
                    count[(chars[i]-97)]++;
             }                 
          }
          for(int i = 0; i < 26; i++)
          {
             if(count[i] != 0)  
                System.out.println(((char)(i+97)) + "\t" + count[i]);
          }
}

Example to remove spaces between a String:

String myString = "Hello World"; 

myString = myString.replaceAll(" ","");  

or  

myString = "Hello World".replaceAll("\\s+",""); 

System.out.println("After remove space myString::"+myString);