hammer.java

来自「北京大学出版社的」· Java 代码 · 共 32 行

package questions.c5;
class Tool {
   private String name = "";
   public void setName( String n ) {
      name = n;
   }
   public String getName() {
      return name;
   }
   String toString() {
      return name;
   }
}
public class Hammer extends Tool {
   private int weight;
   public void setWeight( int w ) {
      weight = w;
   }
   public int getWeight() {
      return weight;
   }
   String toString() {
      return Tool.toString() + " "
             + String.valueOf( weight );
   }
   public static void main( String[] args ) {
      Hammer sledge = new Hammer();
      sledge.setName( "sledge hammer" );
      sledge.setWeight( 10 );
      System.out.println( sledge );
   }
}