Java 运行结果

class Meal{
Meal(){System.out.println("Meal()");}
}
class Bread{
Bread(){System.out.println("Bread()");}
}
class cheese{
cheese(){System.out.println("cheese()");}
}
class Lettuce{
Lettuce(){System.out.println("Lettuce()");}
}
class Lunch extends Meal{
Lunch(){System.out.println("Lunch()");}
}
class PortableLunch extends PortableLunch{
private Bread b = new Bread();
private Cheese c = new cheese();
private Lettuce l = new Lettuce();
public SandWich() {
System.out.println("SandWich()");
}
public static void main(String[] args){
new Sandwich();
}
}

你自己运行下，就知道了结果了，不必用的。