detergent.java

建议：此程序最好放到计算机上调试

public class Detergent extends Cleanser {

public void scrub() {
append(" Detergent.scrub()"); 
super.scrub();
}
public void foam() { append(" foam()"); }
public static void main(String[] args) 
{ Detergent x = new Detergent();
 x.dilute();
 x.apply();
 x.scrub();
 x.foam();
 System.out.println(x);
 System.out.println("Testing base class:");
 Cleanser.main(args); } }