Count Uppercase, Lowercase,Special character and Numeric values in Java
Count Uppercase, Lowercase, Special character and Numeric values in Java
In this article, we will discuss the concept of the Count Uppercase, Lowercase, Special character and Numeric values in Java
In this post, we are going to learn how to count Uppercase, Lowercase, Special character and Numeric values of the given String in Java programming language
Uppercase, Lowercase, Special character and Numeric values in Java
Find Uppercase, Lowercase, Special character and Numeric values using for loop
The program allows the user to enter a String and then it counts and display the total number of upper case, lower case, numeric values and special characters of the given string using for loop in Java programing language
Program 1
import java.util.Scanner; public class CountUpperLowerOthers{ public static void main(String args[]){ //variable declaration String str; int upper=0,lower=0,num=0,Special=0; //vriable declaration and initialization Scanner scan=new Scanner(System.in); //create a scanner object for input System.out.println("Enter the String "); str=scan.nextLine(); for(int i=0; i<str.length(); i++){ char ch=str.charAt(i); if(ch>='A' && ch<='Z'){//check uppercase upper++; } else if(ch>='a' && ch<='z'){ //check lower case lower++; } else if(ch>='0' && ch<='9'){ //check numeric num++; } else{ Special++; } } System.out.println("\nlowercase letters: "+lower); System.out.println("uppercase letters: "+upper); System.out.println("Number: "+num); System.out.println("Special characters: "+Special); } }
When the above code is executed, it produces the following result
Enter the String code4coding.com-Learn_Coding lowercase letters: 22 uppercase letters: 2 Number: 1 Special characters: 3
Approach
- Declare a String variable as String str;
- Declare and initialize some integer variables as int upper=0,lower=0,num=0,Special=0;
- The user asked to enter a string to count upper case, lower case, Numeric, Special characters
- The given string is stored in the variable str;
- A for-loop is used to count total characters of the given string
- It is initialized as i=0, checks the condition whether i<str.length(); and executes the loop until the given condition becomes true
- Use an if statements to test (ch>=’A’ && ch<=’Z’), if it is true, The upper becomes upper + 1(upper=upper+1);
- When it is false, control moves to the else-if part and evaluates the test-expression of else-if. if it is true, The lower becomes lower + 1(lower=lower+1);
- When it is false, control moves to the next else-if part and evaluates the test-expression of else-if. If it is true The num becomes num+1(num=num+1);
- When it is false, control moves to the else part and executes the else part statements. the special becomes special+1
- Finally, the program displays the total number of the upper case, lower case, Numeric, Special characters of the given string
Find Uppercase, Lowercase, Special character and Numeric values using while loop
The program allows the user to enter a String and then it counts and display the total number of upper case, lower case, numeric values and special characters of the given string using while loop in Java programing language
Program 2
import java.util.Scanner; public class CountUpperLowerOthers1{ public static void main(String args[]){ //variable declaration String str; int upper=0,lower=0,num=0,Special=0; //vriable declaration and initialization Scanner scan=new Scanner(System.in); //create a scanner object for input System.out.println("Enter the String "); str=scan.nextLine(); int i=0; while(i<str.length()){ char ch=str.charAt(i); if(ch>='A' && ch<='Z'){ upper++; } else if(ch>='a' && ch<='z'){ lower++; } else if(ch>='0' && ch<='9'){ num++; } else{ Special++; } i++; } System.out.println("\nlowercase letters: "+lower); System.out.println("uppercase letters: "+upper); System.out.println("Number: "+num); System.out.println("Special characters: "+Special); } }
When the above code is executed, it produces the following result
Enter the String URL:code4coding.com lowercase letters: 13 uppercase letters: 3 Number: 1 Special characters: 2
Approach
- Declare a String variable as String str;
- Declare and initialize an integer variables as int upper=0,lower=0,num=0,Special=0;
- The user asked to enter a string to count upper case, lower case, Numeric, Special characters
- The given string is stored in the variable str;
- A while-loop is used to count total characters of the given string.
- It is initialized as i=0, checks the condition whether i<str.length(); and executes the loop until the given condition becomes true
- Use an if condition to test (ch>=’A’ && ch<=’Z’), if it is true, The upper becomes upper + 1(upper=upper+1);
- When it is false, control moves to the else-if part and evaluates the test expression of else-if . if it is true The lower becomes lower + 1(lower=lower+1);
- When it is false, control moves to the next else-if part and evaluates the test-expression of else-if. if it is true The num becomes num+1(num=num+1);
- When it is false, control moves to the else part and executes the else part statements. the special becomes special+1
- Finally, the program displays the total number of the upper case, lower case, Numeric, Special characters of the given string
Find Uppercase, Lowercase, Special character and Numeric values using do-while loop
The program allows the user to enter a String and then it counts and display the total number of upper case, lower case, numeric values and special characters of the given string using do-while loop in Java programing language
Program 3
import java.util.Scanner; public class CountUpperLowerOthers2{ public static void main(String args[]){ //variable declaration String str; int upper=0,lower=0,num=0,Special=0; //vriable declaration and initialization Scanner scan=new Scanner(System.in); //create a scanner object for input System.out.println("Enter the String "); str=scan.nextLine(); int i=0; do{ char ch=str.charAt(i); if(ch>='A' && ch<='Z'){ upper++; } else if(ch>='a' && ch<='z'){ lower++; } else if(ch>='0' && ch<='9'){ num++; } else{ Special++; } i++; }while(i<str.length()); System.out.println("lowercase letters: "+lower); System.out.println("uppercase letters: "+upper); System.out.println("Number: "+num); System.out.println("Special characters: "+Special); } }
When the above code is executed, it produces the following result
Enter the String code4coding.com-Java,C,C++,Python lowercase letters: 26 uppercase letters: 4 Number: 1 Special characters: 7
Approach
- Declare a String variable as String str;
- Declare and initialize an integer variables as int upper=0,lower=0,num=0,Special=0;
- The user asked to enter a string to count upper case, lower case, Numeric, Special characters
- The given string is stored in the variable str;
- A do-while-loop is used to count total characters of the given string.
- It is initialized as i=0, checks the condition whether i<str.length(); and executes the loop until the given condition becomes true
- Use an if condition to test if(ch>=’A’ && ch<=’Z’), if it is true, The upper becomes upper + 1(upper=upper+1);
- When it is false, control moves to the else-if part and evaluates the test-expression of else-if. if it is true The lower becomes lower + 1(lower=lower+1);
- When it is false, control moves to the next else-if part and evaluates the test-expression of else-if. if it is true The num becomes num+1(num=num+1);
- When it is false, control moves to the else part and executes the else part statements. the special becomes special+1
- Finally, the program displays the total number of the upper case, lower case, Numeric, Special characters of the given string
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