What if the string in the Java split is not found

Question

    String incomingNumbers[ ] = writtenNumber.split("\\-"); 

The program accepts natural language numbers such as thirty-two or five.
So if five is entered, what lands in my incomingNumbers array?

Answer 1

You get an array of size 1 holding the original value:

Input       Output -----       ------ thirty-two  {"thirty", "two"} five        {"five"} 

You can see this in action in the following program:

class Test {     static void checkResult (String input) {         String [] arr = input.split ("\\-");         System.out.println ("Input   : '" + input + "'");         System.out.println ("    Size: " + arr.length);         for (int i = 0; i < arr.length; i++)             System.out.println ("    Val : '" + arr[i] + "'");         System.out.println();     }      public static void main(String[] args) {         checkResult ("thirty-two");         checkResult ("five");     } } 

which outputs:

Input   : 'thirty-two'     Size: 2     Val : 'thirty'     Val : 'two'  Input   : 'five'     Size: 1     Val : 'five'