相关疑难解决方法(0)

我试图在java中学习比较器,我在网上找到了这个很好的例子,我的问题是如何更改这些代码,以便按年龄和降序排列宠物名称,以便最老的是第一个,最小的是最后一个？

class Dog implements Comparator<Dog>, Comparable<Dog>{
private String name;
private int age;
Dog(){
}

Dog(String n, int a){
  name = n;
  age = a;
}

public String getDogName(){
  return name;
}

public int getDogAge(){
  return age;
}

// Overriding the compareTo method
public int compareTo(Dog d){
  return (this.name).compareTo(d.name);
}

// Overriding the compare method to sort the age 
public int compare(Dog d, Dog d1){
  return d.age - d1.age;
}
}

public class Example{
public static void main(String args[]){
  // Takes …