test7.2

这个题目用到多重继承：Detergent继承了Cleanser,然后Test2继承了Detergent

class Cleanser{

private String s="Cleanser";

public void append(String a){s+=a;}

public void dilute(){append(" delute()");}

public void apply(){append(" apply()");}

public void scrub(){append(" scrub()");}

public String toString(){return s;}

public static void main(String[] args)

{
Cleanser x=new Cleanser();
x.dilute();x.apply();x.scrub();
System.out.println(x);

}

}

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.foam();x.scrub();
System.out.println(x);
System.out.println("Testing base class");
Cleanser.main(args);
}

}

public class Test2 extends Detergent {
public void scrub()
{append(" Test2.scrub()");super.scrub();}
public void sterilize(){append(" sterilize()");}
public static void main(String[] args) {
Test2 t=new Test2();
t.dilute();t.apply();t.foam();
t.sterilize();t.scrub();
System.out.println(t);
System.out.println("Testing Detergent class");
Detergent.main(args);
}

}