Help in Regex

[Frederico Benevides]

I'm was studying this code

import java.util.Scanner;
 
class ScannerTest2 {
 
    public static void main(String[] args) {

        String input = "10 apples 20 oranges 33 pears";
        Scanner s = new Scanner(input).useDelimiter("\\d\\d\\s");
        
        while( s.hasNext())
            System.out.println(s.next());
        s.close();
    }
}
 

So my interest is to this the same program using Pattern, so I tried and wrote this:

import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
public class Test {

public static void main(String[] args) {

//Pattern p = Pattern.compile("\\d\\d\\s");
Pattern p = Pattern.compile("\\D+*");
Matcher m = p.matcher("10 apples 20 oranges 33 pears");

boolean b = m.matches();

System.out.println(b);

while(m.find()) {
System.out.println(m.group());
}
}
 
}
 

My problem is that the second program, is writing with space before the words, and I don't wanna this, because in the program using scanner don't do, and I want to learn how to do the same thing using Pattern.....

So, have some one have any idea ?

Thank you.

[Ilja Preuss]

Do you know what \\D stands for? Why would it lead to spaces being included?

Hope this helps you getting into the right direction - teaching a man to fish, and all that...

[Frederico Benevides]

I know what is \D , is to get everything that is not a number...

I know will get the space too... but I don't know how to get only the words... if I choose \w+ will get the numbers too, that's my problem.

Thank you.

[Alan Moore]

So you want to match anything that's not a digit or a whitespace character? Take a look at negated character classes. Also, there's a good regex tutorial here:

http://www.regular-expressions.info/

[Ilja Preuss]

Or one of the other predefined character classes, as described in the JavaDoc for the Pattern class - for example \p{Alpha}. Of course this depends on what *exactly* you want to match...

[Frederico Benevides]

I used \p{Alpha} worked here, and I used too [a-z]+ worked too.

Thank for the help and for the site;

[]'s Frederico.