Regular expressions with java.util.regex

Question

Hello Guys,
I wrote last time this
* Uses split to break up a string of input separated by
* commas and/or whitespace.
* See: http://developer.java.sun.com/developer/technicalArticles/releases/1.4regex/
* Change: I have slightly modified the source
import java.util.regex.*;
public class Splitter {
public static void main(String[] args) throws Exception {
// Create a pattern to match breaks
Pattern p = Pattern.compile("[<>\\s]+");
// Split input with the pattern
String[] result =
p.split("<element attributname1 = \"attributwert1\" attributname2 = \"attributwert2\">");
for (int i=0; i<result.length; i++)
if (result.equals(""))
System.out.println("EMPTY");
else
System.out.println(result[i]);
int res = result.length - 1;
System.out.println("\nStringlaenge: " + res);
I wonder, why I got an empty element in reult[0]. Have anyone an idea?
We'll come together next time
... �nhan Inay ([email protected])

Answer 1

What is wrong with this Pattern?
Pattern p = Pattern.compile("^<[a-zA-Z0-9_\\"=]+[\\s]*$>");
This time i used following Split:
p.split("<element attributname1=\"attributwert1\" attributname2=\"attributwert2\">");
I've got a compilation error:
U:\qms_neu\htdocs\inay\Source\myWork\Regex-Samples>javac Splitter.java
Splitter.java:14: illegal start of expression
Pattern p = Pattern.compile("^<[a-zA-Z0-9_\\"=]+[\\s]*$>");
^
Splitter.java:14: illegal character: \92
Pattern p = Pattern.compile("^<[a-zA-Z0-9_\\"=]+[\\s]*$>");
^
Splitter.java:14: illegal character: \92
Pattern p = Pattern.compile("^<[a-zA-Z0-9_\\"=]+[\\s]*$>");
^
Splitter.java:14: unclosed string literal
Pattern p = Pattern.compile("^<[a-zA-Z0-9_\\"=]+[\\s]*$>");
^
Splitter.java:17: ')' expected
p.split("<element attributname1=\"attributwert1\" attributname2
=\"attributwert2\">");
^
Splitter.java:14: unexpected type
required: variable
found : value
Pattern p = Pattern.compile("^<[a-zA-Z0-9_\\"=]+[\\s]*$>");
^
Splitter.java:18: cannot resolve symbol
symbol : variable result
location: class Splitter
for (int i=0; i<result.length; i++)
^
Splitter.java:19: cannot resolve symbol
symbol : variable result
location: class Splitter
if (result.equals("")){
^
Splitter.java:21: cannot resolve symbol
symbol : variable result
location: class Splitter
System.out.println(result[0]);
^
Splitter.java:24: cannot resolve symbol
symbol : variable result
location: class Splitter
System.out.println(result[i]);
^
Splitter.java:25: cannot resolve symbol
symbol : variable result
location: class Splitter
int res = result.length - 1;
^
11 errors