Thanks for reply Michael, it is working now. But i have a question about that 
also. If I use some jars in different versions, is it a problem? I mean that:
<dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-coverage</artifactId>
            <version>2.5.4</version>
        </dependency>
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-image</artifactId>
            <version>2.4.4</version>
        </dependency>

Would that be a problem?
--- On Tue, 5/12/09, Michael Bedward <[email protected]> wrote:

From: Michael Bedward <[email protected]>
Subject: Re: [Geotools-gt2-users] ImageLab Tutorial - WorldImageReader  Question
To: "Leon L." <[email protected]>, "gt2-users" 
<[email protected]>
Date: Tuesday, May 12, 2009, 7:41 AM

Hi Leon,

It looks like your missing the geoapi jar from your local repository.
Below is a pom.xml that I've just tested with the ImageLab code and
GeoTools 2.5.4.  You'll see that it has only a few explicity
dependencies - the other required jars being pulled in my the magic of
maven.

Hope this helps
Michael

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/maven-v4_0_0.xsd";>
    <modelVersion>4.0.0</modelVersion>
    <groupId>org.geotools.demo</groupId>
    <artifactId>imagelab</artifactId>
    <packaging>jar</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>imagelab</name>
    <url>http://maven.apache.org</url>
    <build>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.0.2</version>
                <configuration>
                    <source>1.5</source>
                    <target>1.5</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-coverage</artifactId>
            <version>2.5.4</version>
        </dependency>
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-image</artifactId>
            <version>2.5.4</version>
        </dependency>
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-render</artifactId>
            <version>2.5.4</version>
        </dependency>
    </dependencies>

    <repositories>
        <repository>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
            <id>ibiblio</id>
            <name>Ibiblio - the public's library and digital archive</name>
            <url>http://www.ibiblio.org/maven2</url>
        </repository>

        <repository>
            <id>osgeo</id>
            <name>Open Source Geospatial Foundation Repository</name>
            <url>http://download.osgeo.org/webdav/geotools/</url>
        </repository>

        <repository>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
            <id>geotools</id>
            <name>Geotools repository</name>
            <url>http://maven.geotools.fr/repository</url>
        </repository>
    </repositories>

</project>



      
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