Question

I have a very simple program with one textbox, and a button.

The user is told to put the name of two colors in the box, separated by a space.

For example “red green”
The output will print on the screen, “The apple is red with green dots.”.

However I need it to function when there is only one word entered on the screen. I am using an array holding the split strings. When I only type in red, I get this error.

“AWT-EventQueue-0” java.lang.ArrayIndexOutOfBoundsException:

Here is the code:

String userInput = textField.getText();
String[] userInputSplit = userInput.split(" ");
String wordOne = userInputSplit[0];
String wordTwo = userInputSplit[1];
if (wordTwo !=null){
                System.out.println("The apple is " + wordOne + " with " + wordTwo + " dots.");
                } else {
                 System.out.println("The apple is " + wordOne + " with no colored dots.");
                }

Answer 1

Could just do something easy like this:

String wordOne = userInputSplit[0];
String wordTwo = null;
if (userInputSplit.length > 1){
    //This line will throw an error if you try to access something 
    //outside the bounds of the array
    wordTwo = userInputSplit[1];  
}
if (wordTwo !=null) {
    System.out.println("The apple is " + wordOne + " with " + wordTwo + " dots.");
} 
else {
    System.out.println("The apple is " + wordOne + " with no colored dots.");
}