cleanser.java

建议：此程序最好放到计算机上调试

//: c06:Detergent.java
// Inheritance syntax & properties.（清洁剂）
 class Cleanser { 
 private String s = new String("Cleanser");
 public void append(String a) { s += a; } 
 public void dilute() {append("dilute()"); } 
 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();  // 稀释
 x.apply();
 x.scrub(); 
 System.out.println(x);
  } 
 }