Comparable and Comparator both are interfaces and can be used to sort collection elements. But what's the difference between them: Comparable :This interface has one methodcompareTo.Class whose objects to be sorted must implement this Comparable interface. In this case there is one form or way ...
Comparator位于包java.util下,而Comparable位于包 java.lang下. Comparable 是一个对象本身就已经支持自比較所须要实现的接口(如 String、Integer 自己就能够完毕比較大小操作。已经实现了Comparable接口) 自己定义的类要在增加list容器中后可以排序,可以实现Comparable接口。在用Collections类的sort方法排序时,假设不指定Compa...
如果是通过评分(rank)进行排序,User类写法如下 public class User implements Comparable<User>{ private Integer id; private Integer rank; private Integer age; private String name; //getter and setter public User(Integer rank, Integer age, String name) { this.rank = rank; this.age = age; this.n...
如果我们的排序方式一般不会变化,我们知道要排序什么字段,在创建对象的时候可以直接实现Comparable接口。 如果我们还不清楚要比较什么字段,那么可以等到后续确定的时候实现Comparator接口,Comparator接口是从外部进行排序,不会对对象产生影响。 参考 Whats-the-difference-between-Comparable-and-Comparator-Interface-Java...
publicclassUserimplementsComparable<User>{privateInteger id;privateInteger rank;privateInteger age;privateString name;//getter and setterpublicUser(Integer rank, Integer age, String name){this.rank = rank;this.age = age;this.name = name;
如果我们的排序方式一般不会变化,我们知道要排序什么字段,在创建对象的时候可以直接实现Comparable接口。 如果我们还不清楚要比较什么字段,那么可以等到后续确定的时候实现Comparator接口,Comparator接口是从外部进行排序,不会对对象产生影响。 参考 Whats-the-difference-between-Comparable-and-Comparator-Interface-Java...
Comparator interface belongs to java.util package while comparable belongs to java.lang package. 20th Aug 2020, 7:15 AM Vishakha Shrivastav + 4 Ajay Usage of Java function Arays.sort() and Collection.sort(): If you are using Comparable for Sorting then you can use Arrays.sort() and ...
如果我们的排序方式一般不会变化,我们知道要排序什么字段,在创建对象的时候可以直接实现Comparable接口。 如果我们还不清楚要比较什么字段,那么可以等到后续确定的时候实现Comparator接口,Comparator接口是从外部进行排序,不会对对象产生影响。 参考 Whats-the-difference-between-Comparable-and-Comparator-Interface-Java...
2、https://stackoverflow.com/questions/6176019/comparing-long-values-using-collections-sortobject 3、http://www.java2blog.com/2013/02/difference-between-comparator-and-comparable-in-java.html 4、http://www.geeksforgeeks.org/comparable-vs-comparator-in-java/...
Java Comparable Java Comparator This article will discuss comparable and comparators and find the difference between their definitions and their use cases in Java. Java Comparable A Comparable object in Java is used to compare itself with the other objects. We need to implement the java.lang....