Want to find If a given String contains only letters in Java? Use the following Java program to find If a given String contains only letters.
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import java.util.Scanner; public class StringValidation{ public boolean validtaeString(String str) { str = str.toLowerCase(); char[] charArray = str.toCharArray(); for (int i = 0; i < charArray.length; i++) { char ch = charArray[i]; if (!(ch >= 'a' && ch <= 'z')) { return false; } } return true; } public static void main(String args[]) { Scanner sc= new Scanner(System.in); System.out.println("Enter a string value: "); String str = sc.next(); StringValidation obj = new StringValidation(); boolean bool = obj.validtaeString(str); if(!bool) { System.out.println("Given String is invalid."); }else{ System.out.println("Given String is valid."); } } } |
Program Output
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Enter a string value: 24FreeWebMentor23980 Given String is invalid. |
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