Check if line is empty in java? [duplicate]

Question

Possible Duplicate:
How to check that Java String is not all whitespaces

Scanner kb = new Scanner(System.in);
String random;

System.out.print("Enter your word: ");
random = kb.nextLine();

if (random.isEmpty()) {     
    System.out.println("No input detected!");                   
} else {
    System.out.println(random);
}

The above code doesn't account for when the user makes a space. It'll still print the blank line, when the user does a space and presses enter.

How do I fix this?

Answer 1

You can trim the whitespaces using String#trim() method, and then do the test: -

if (random.trim().isEmpty())

Answer 2

Another solution could be trim and equals with empty string.

if (random.trim().equals("")){       
            System.out.println("No input detected!");                   
}

Answer 3

another solution

if (random != null || !random.trim().equals(""))
   <br>System.out.println(random);
<br>else
   <br>System.out.println("No input detected!");