IsDemo.java Source code

Introduction

Here is the source code for IsDemo.java

Source

class IsDemo {
    public static void main(String args[]) {
        char a[] = { 'a', 'b', '5', '?', 'A', ' ' };

        for (int i = 0; i < a.length; i++) {
            if (Character.isDigit(a[i]))
                System.out.println(a[i] + " is a digit.");
            if (Character.isLetter(a[i]))
                System.out.println(a[i] + " is a letter.");
            if (Character.isWhitespace(a[i]))
                System.out.println(a[i] + " is whitespace.");
            if (Character.isUpperCase(a[i]))
                System.out.println(a[i] + " is uppercase.");
            if (Character.isLowerCase(a[i]))
                System.out.println(a[i] + " is lowercase.");
        }
    }
}