count the repeated character in one string

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count the repeated character in one string

to find the how character occurrence in one String (for example the string is -java means there is 2 'a 'was repeated )

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December 22, 2010 at 11:17 AM

Hi Friend,

Try the following code:

import java.util.*;

class  CountCharacters {
  public static void main(String[] args) throws Exception{
  Scanner input=new Scanner(System.in);
  System.out.print("Please enter string ");
  System.out.println();
  String str=input.nextLine();
  String st=str.replaceAll(" ", "");

  char[]third =st.toCharArray();
  for(int counter =0;counter<third.length;counter++){
  char ch= third[counter];
  int count=0;
  for ( int i=0; i<third.length; i++){
  if (ch==third[i])
  count++;
}
boolean flag=false;
for(int j=counter-1;j>=0;j--){
if(ch==third[j])
flag=true;
}
if(!flag){
System.out.println("Character :"+ch+" occurs "+count+" times ");
}
}
}
}

Thanks


March 24, 2013 at 11:30 PM

//program to find number of repeating characters in a string

//Developed by Subash

import java.util.Scanner;

public class NoOfRepeatedChar

{

public static void main(String []args)

{

//input through key board

Scanner sc = new Scanner(System.in);

System.out.println("Enter a string :");

String s1= sc.nextLine();

        //formatting String to char array

        String s2=s1.replace(" ","");
        char [] ch=s2.toCharArray();

        int counter=0;

        //for-loop tocompare first character with the whole character array

        for(int i=0;i<ch.length;i++)
        {
            int count=0;

            for(int j=0;j<ch.length;j++)
            {
                 if(ch[i]==ch[j])
                    count++; //if character is matching with others
            }
            if(count>1)
            {
                boolean flag=false;

                //for-loop to check whether the character is already refferenced or not 
                for (int k=i-1;k>=0 ;k-- )
                {
                    if(ch[i] == ch[k] ) //if the character is already refferenced
                        flag=true;
                }
                if( !flag ) //if(flag==false) 
                    counter=counter+1;
            }
        }
    if(counter > 0) //if there is/are any repeating characters
System.out.println("Number of repeating charcters in the given string is/are " +counter);

else

System.out.println("Sorry there is/are no repeating charcters in the given string");

}

}

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