How to print duplicate characters from the string with its count.?

     

 

• How to print duplicate characters from the string with its count.?

Input: Sateesh
Output:
Char: S, Count: 2 times.
Char: a, Count: 1 times.
Char: t, Count: 1 times.
Char: e, Count: 2 times.
Char: h, Count: 1 times.

public class Demo1 {

public static void main(String[] args) {

String s="sateesh";

     

      int count=0,len=0;

      while(len!=1)

        {  

         

          char name[]=s.toCharArray();

              len=name.length;

              count=0;

              for(int j=0;j<len;j++)

              {

                  if((name[0]==name[j])&&((name[0]>=65&&name[0]<=91)||                                                                                                        (name[0]>=97&&name[0]<=123))) 

                      count++;

              }

              if(count!=0)

                System.out.println(name[0]+" "+count+" Times");

              s=s.replace(""+name[0],"");          

        }

       

     

}

}

Output:
Char: S, Count: 2 times.
Char: a, Count: 1 times.
Char: t, Count: 1 times.
Char: e, Count: 2 times.
Char: h, Count: 1 times.

more programs visit http://sateeshm.com/

We can say if two strings are an anagram of each other if they contain the same characters but at different orders.

    

 We can say if two strings are an anagram of each other if they contain the same characters but at different orders.

String str1="sateesh";

String str2="sateehs";

Output: Same 

import java.util.Arrays;

public class Demo1 {

public static void main(String[] args) {

    String str1="sateesh";

    String str2="sateehs";

       

        boolean [] char_set = new boolean[256];

        boolean [] char_set1 = new boolean [256];

        for(int i =0;i<str1.length();i++){

            int val1 = str1.charAt(i);

            int val2 = str2.charAt(i);

            char_set[val1] = true;

            char_set1[val2] = true;

        }

        if(Arrays.equals(char_set, char_set1)){

            System.out.println("Same");

        }

        else

        {

        System.out.println("Not a same");

        }

     

}

}

Output:

same

more programs visit http://sateeshm.com/

   

 

• How to reverse the words from the given string sentence?

String: MSK Technologies

Output: KSM seigolonhceT 

public class Demo1 {

public static void main(String[] args) {

String s="MSK Technologies";

String[] words = s.split(" ");

        int x,y;

        String reverseString = "";

         

        for ( x = 0; x < words.length; x++) 

        {

            String word = words[x];

             

            String reverseWord = "";

             

            for ( y = word.length()-1; y >= 0; y--) 

            {

                reverseWord = reverseWord + word.charAt(y);

            }

             

            reverseString = reverseString + reverseWord + " ";

        }

         

        System.out.println(s);

         

        System.out.println(reverseString);

         

        

    }

     

}

Output:

KSM seigolonhceT 

more programs visit http://sateeshm.com/

   

 remove first and last occurrence of string java

String: codedecode

input: e

Output: coddecod

public class Demo200 {

public static void main(String[] args) {

String s="codedecode";

char ch='e';

for (int i = 0; i < s.length(); i++)

    {

 

       

        if (s.charAt(i) == ch)

        {

            s = s.substring(0, i) +

                s.substring(i + 1);

            break;

        }

    }

 

   

    for (int i = s.length() - 1; i > -1; i--)

    {

 

       

        if (s.charAt(i) == ch)

        {

            s = s.substring(0, i) +

                s.substring(i + 1);

            break;

        }

    }

  System.out.println(s);

}

}

Output:

coddecod

more programs visit http://sateeshm.com/

  

 Count the unique characters in a given String

String: Sateesh

Output: 3

public class Demo200 {

public static void main(String[] args) {

String s="sateesh";

StringBuffer str=new StringBuffer(s);

for (int i = 0; i < str.length(); i++)

    {

        int flag = 0;

        for (int j = 0; j < str.length(); j++)

        {

            

            if (str.charAt(i) == str.charAt(j) && i != j)

            {

                flag = 1;

               

                break;

            }

        }

        if (flag == 0)

            System.out.print(str.charAt(i));

    }

}

}

Output:

3

more programs visit http://sateeshm.com/

 

 Display unique characters in a given String

String: Sateesh

Output: ath

public class Demo200 {

public static void main(String[] args) {

String s="sateesh";

StringBuffer str=new StringBuffer(s);

for (int i = 0; i < str.length(); i++)

    {

        int flag = 0;

        for (int j = 0; j < str.length(); j++)

        {

           

            if (str.charAt(i) == str.charAt(j) && i != j)

            {

                flag = 1;

               

                break;

            }

        }

        if (flag == 0)

            System.out.print(str.charAt(i));

    }

}

}

Output:

ath

more programs visit http://sateeshm.com/

 Count the number of divisible numbers in a given range

Range: 1-100

Number : 2

Output: 50

import java.util.Scanner;

public class Demo {

public static void main(String[] args) {

int x=1,n,count=0;

Scanner s=new Scanner(System.in);

System.out.println("Enter n value");

n=s.nextInt();

do

{

if(x%n==0)

{

count=count+1;

}

x++;

}while(x<=100);

System.out.println(count);

}

}

Output:

Enter n value

2

50

more programs visit http://sateeshm.com/

Sum Of Even Or Odd Numbers Based On The N value DoWhile Loop

 

• Sum Of Even Or Odd Numbers Based On The N value DoWhile Loop

import java.util.Scanner;

public class Demo {

public static void main(String[] args) {

int x=1,n,sum=0;

Scanner s=new Scanner(System.in);

System.out.println("Enter n value");

n=s.nextInt();

do

{

if(x%2==0 && n%2==0)

{

sum=sum+x;

}

else if(x%2!=0 && n%2!=0)

{

sum=sum+x;

}

x++;

}while(x<=n);

System.out.println("sum is " +sum);

}

}

output:

Enter n value 5

sum is 9

Enter n value 6

sum is 12