Hi

I've typed in the following code from a book I'm reading and it wont
compile. I know the classpath is OK as if I create a new ShowThread()
without a string initialiser then the code compiles. But as soon as I place
a String in there it wont compile. Even though the only constructor I've
given ShowThread takes a String

ShowThread.java

package thready;

public class ShowThread extends Thread {
   String message;
   /** Creates a new instance of ShowThread */
   public ShowThread(String message) {
       this.message=message;
   }

   public void run() {
       while(true) {
           System.out.println(message);
       }
   }
}

Main.java
package thready;
import java.lang.*;

public class Main {

   /** Creates a new instance of Main */
   public Main() {
   }

   public static void main(String[] args) {
       new ShowThread();  // this line compiles ok
       new ShowThread("Hello"); // this line gives error
   }

}

the error I get for the second instansiation of ShowThread is
      cant find symbol
      constructor ShowThread(java.lang.String)
      location class thready.ShowThread

Why cant the compiler see my constructor with a String argument?