bicycle.java

来自「北京大学出版社的」· Java 代码 · 共 14 行

class Vehicle {
   protected void goSomewhere() {
      System.out.println( "travelling..." );
   }
}
public class Bicycle extends Vehicle {
   public void goSomewhere() {
      System.out.println( "pedalling..." );
   }
   public static void main( String[] args ) {
      Bicycle x = new Bicycle();
      x.goSomewhere();
   }
}