Error in Eclipse when compiling code but not when is validated - eclipse

Question

I have Eclipse Java EE IDE Helios Service Release 2 Build id: 20110218-0911; I am trying use them with SeleniumRC and when I compile the code appears the next error message:
Type mismatch: cannot convert from DataProviderSites to annotation
The attribute DataProviderSites is undefined for the annotation type Test
However, when I validate the code, is visualized "the validation completed with no errors or warnings"
The Code in DataProviderSites.java is:
package script;
import org.junit.Test;
import junit.framework.TestCase;
import com.thoughtworks.selenium.SeleneseTestBase;
import org.junit.AfterClass;
import org.openqa.selenium.server.SeleniumServer;
import org.testng.annotations.*;
import java.io.File;
import jxl.*;
public class DataProviderSites extends SeleneseTestBase {
#BeforeClass
public void setUp() throws Exception {
SeleniumServer seleniumserver=new SeleniumServer();
seleniumserver.boot();
seleniumserver.start();
setUp("http://www.examinator.ws/", "*firefox");
selenium.open("/");
selenium.windowMaximize();
selenium.windowFocus();
}
#DataProviderSites
(name = "DPS1")
public Object[][] createData1() throws Exception{
Object[][] retObjArr=getTableArray("test\\Resources\\Data\\sitios.xls",
"DataPool", "TestData");
return(retObjArr);
}
#Test(DataProviderSites = "DPS1")
public void testDataProviderSites(String nombre) throws Exception {
selenium.type("sitio", nombre);
if (selenium.isTextPresent("examinator"))
selenium.click("xpath=/descendant::button[#type='submit']");
else
selenium.waitForPageToLoad("30000");
selenium.click("xpath=/descendant::a[text()='"+nombre+"']");
}
#AfterClass
public void tearDown(){
selenium.close();
selenium.stop();
}
public String[][] getTableArray(String xlFilePath, String sheetName, String tableName) throws Exception{
String[][] tabArray=null;
Workbook workbook = Workbook.getWorkbook(new File(xlFilePath));
Sheet sheet = workbook.getSheet(sheetName);
int startRow,startCol, endRow, endCol,ci,cj;
Cell tableStart=sheet.findCell(tableName);
startRow=tableStart.getRow();
startCol=tableStart.getColumn();
Cell tableEnd= sheet.findCell(tableName, startCol+1,startRow+1, 100, 64000, false);
endRow=tableEnd.getRow();
endCol=tableEnd.getColumn();
System.out.println("startRow="+startRow+", endRow="+endRow+", " +
"startCol="+startCol+", endCol="+endCol);
tabArray=new String[endRow-startRow-1][endCol-startCol-1];
ci=0;
for (int i=startRow+1;i<endRow;i++,ci++){
cj=0;
for (int j=startCol+1;j<endCol;j++,cj++){
tabArray[ci][cj]=sheet.getCell(j,i).getContents();
}
}
return(tabArray);
}
}
Anybody have a idea to resolve this?

Answer 1

Just click the error and click "Convert to TestNG(Annotations)".

Answer 2

Validation does not check the logic like it does not check for syntax of code.
But when we compile the program it will check for syntax so you got type cast exception.
Validation success does not mean program is correct.
I think annotations(#Test(DataProviderSites = "DPS1"), #DataProviderSites
(name = "DPS1")) causes the exception.