public static void main(String[] args) {
// TODO Auto-generated method stub
Trans job1=new Trans();
Trans job2=new Bus();
Trans job3=new Plane();
Trans job4=new Ship();
job1.mean();
job2.mean();
job3.mean();
job4.mean();
}
public class HelloWorld{
static String className="java开发一班";
}
public static void main(String args){
System.out.println(HelloWorld.className);
}
