AlliedModders - Java help

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Hello,

I'm kinda new to Java but I like it and it is a lot of fun. I got some trouble finding out how to print out the first and last word in an entered sentence.

Say you have a JOptionPane.showInputDialog coming up for the user, the user enters a sentence of a minimum of 2 words. When he hits "Ok" I want the first word and last word to be displayed in the same JOptionPane.showMessageDialog.

Ex sentence. Hello world
First word: Hello
Last word: world

I was really trying on my own but did not get that far, I was able to use this on one set String. Here is my code, please help me get so I can type my own sentence.

PHP Code:


		
			
package blabla;



import javax.swing.JOptionPane;



public class blabla {

    public static void main(String[] args)

    {

        String s = "Able was I ere I saw Elba";

        String firstWord = s.substring(0, s.indexOf(' '));

        JOptionPane.showMessageDialog(null, "You have entered a total of "

                            + s.length()

                                + " characters\n"

                                    + "First word: "

                                        + firstWord

                                            + "\nLast word: "

                                                + s.substring (s.lastIndexOf(' '), s.length()));

    }

}

You need to replace the existing string with a call to JOptionPane.showInputDialog, which returns the input as a String.

Something like

PHP Code:


		
			
String s = JOptionPane.showInputDialog("Enter a sentence");

There are also more complicated forms of showInputDialog that allow you to specify a dialog title, message type, etc...

Look up the String split() function: it splits a string into an array of smaller strings, based on a certain delimiter (basically where you want to separate the strings from). You can make it so that it splits it based on a space, so you will get an array of words, in your case. Then take the 0 index and the length-1 index of that array, and those will give you the first and last words entered.

Quote:

Originally Posted by nikhilgupta345 (Post 2071947)

Hi nikilgupta345, would you mind creating an example?

Quote:

Originally Posted by jingojang (Post 2072636)

Hi nikilgupta345, would you mind creating an example?

http://docs.oracle.com/javase/7/docs...lang.String%29

Quote:

Originally Posted by jingojang (Post 2072636)

Hi nikilgupta345, would you mind creating an example?

PHP Code:


		
			
String s = "This is a string";

String[] splitString = s.split();

// splitString = {"This", "is", "a", "string"}

String firstWord = splitString[0];

String lastWord = splitString[splitString.length - 1];



System.out.println("First word: " + firstWord + " Last word: " + lastWord);

Wow, I really had a blonde moment in my previous post, didn't I?

Thanks nikilgupta345

EDIT: nikilgupta345 you should be able to type in your own sentence, not put a sentence in a String. (JOptionPane.showInputDialog)

PHP Code:


		
			
String input = JOptionPane.showInputDialog("Please input a string.");
String[] arrayOfWords = input.split(" ");
System.out.println("First word: " + arrayOfWords[0] + " Last word: " + arrayOfWords[arrayOfWords.length - 1]);