extending an interface in java

foo.java

gregf@jupiter:~/JAVA$ javac Test.java
Test.java:8: no interface expected here
public class Test extends Foo {
                          ^
1 error
gregf@jupiter:~/JAVA$ cat Test.java 


interface Foo {

   public void bar();
}

public class Test extends Foo {

    public static void main(String [] args){

    }
        
   public void bar() {

   }
}