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Check whether the entered value is a letter or not in Java
To check whether the entered value is a letter or not in Java, use the Character.isLetter() method.
We have a value to be checked.
char val = 'D';
Now let us use the Character.isLetter() method.
if (Character.isLetter(val)) {
System.out.println("Character is in Lowercase!");
}else {
System.out.println("Character is in Uppercase!");
}Let us see the complete example now to check for letter.
Example
public class Demo {
public static void main(String []args) {
System.out.println("Checking whether the given value is a Letter or not...");
char val = 'D';
System.out.println("Value: "+val);
if (Character.isLetter(val)) {
System.out.println("Value is a letter!");
}else {
System.out.println("Value is a number!");
}
}
}Output
Checking whether the given value is a Letter or not... Value: D Value is a letter!
Let us see another example.
Example
public class Demo {
public static void main(String []args) {
System.out.println("Checking whether the given value is a Letter or not...");
int val = 20;
System.out.println("Value: "+val);
if (Character.isLetter(val)) {
System.out.println("Value is a letter!");
}else {
System.out.println("Value is not a letter!");
}
}
}Output
Checking whether the given value is a Letter or not... Value: 20 Value is not a letter!
Updated on: 26-Jun-2020
5K+ Views
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