How to find special characters in a string in java | Java program to check and get special characters in a String

Program to find special characters in a string

In this section, you will learn how to find special characters from a string in Java along with counting the total number of special characters in a given string.

Let's try to create a simple example :

  ➤ Example : FindSpecialChar.java;

1. import java.util.Scanner;
   
   class FindSpecialCharactetrs {
       public static void main(String args[]) {
           Scanner input = new Scanner(System.in);
   
           String str;
           char find_special_charactetr[] = new char[1000];
   
           System.out.print("\nEnter a string :");
           str = input.nextLine();
   
           int p, special_charactetr= 0;
           char a[] = str.toCharArray();
           int len = a.length;
   
   
           for(int i = 0; i<len; i++){
             p = a[i];
             if (p >= 65 && p <= 90 || p >= 97 && p <= 122 || p == 32 || p >= 48 && p <= 57) {
               continue;
             } else {
               find_special_charactetr[special_charactetr] = a[i];
               special_charactetr++;
             }
           }
   
           if (special_charactetr > 0){
             System.out.println("\n\n\t______________ OUTPUT ______________");
             System.out.println("\nSpecial characters is :"+String.valueOf(find_special_charactetr));
             System.out.println("There are "+special_charactetr+" special characters");
             System.out.println("\n\t------------------------------------");
           } else {
             System.out.println("\n\n\t______________ OUTPUT ______________");
             System.out.println("\n Note that : No any special characters in : {"+str+"}");
             System.out.println("\n\t------------------------------------");
           }
       }
   }
   
   

 import java.util.Scanner;

class FindSpecialCharactetrs {
    public static void main(String args[]) {
        Scanner input = new Scanner(System.in);  
        String str;
        char find_special_charactetr[] = new char[150];  

        System.out.print("\nEnter a string : ");
        str = input.nextLine(); 

        int p, special_charactetr = 0;
        char a[] = str.toCharArray();
        
        int len = a.length;

        for (int i = 0; i < len; i++) {
            p = a[i];
            if (p >= 65 && p <= 90 || p >= 97 && p <= 122 || p == 32 || p >= 48 && p <= 57) {
                continue;
            } else {
                find_special_charactetr[special_charactetr] = a[i];
                special_charactetr++;
            }
        }


        if (special_charactetr > 0) {
            System.out.println("\n\n\t______________ OUTPUT ______________");
            System.out.println("\nSpecial characters is :" + String.valueOf(find_special_charactetr));
            System.out.println("There are " + special_charactetr + " special characters");
            System.out.println("\n\t------------------------------------");
            System.out.println("\n###### Thanks For Visit 'www.coderwebsite.com' aa####### ");
            
        } else {        
            System.out.println("\n\n\t______________ OUTPUT ______________");
            System.out.println("\n Note that : No any special characters in : {"+str+"}");
            System.out.println("\n\t------------------------------------");
            System.out.println("\n###### Thanks For Visit 'www.coderwebsite.com' ####### ");
        }

    }
}

Output 1:

• Enter a string : #Welc@me t@ c@derwebsite!

•  

• ______________ OUTPUT ______________

•  

• Special characters is ::#@@@!

• There are 5 special characters

• ------------------------------------

Output 2:

• Enter a string : Welcome to coderwebsite

•  

• ______________ OUTPUT ______________

•  

• Note that : No any special characters in : {Welcome to coderwebsite}

• ------------------------------------

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