JAVA自定义类的排序

摘抄自 b站尚硅谷JAVA教程

 

通过实现 Comparable 或者 Camparator来完成

 

 

package com.LearnJava.Compare;

public class myClass implements Comparable{

    private String name;
    private double price;

    public myClass(String name, double price) {
        this.name = name;
        this.price = price;
    }

    @Override
    public String toString() {
        return "myClass{" +
                "name='" + name + '\'' +
                ", price=" + price +
                '}';
    }

    @Override
    public int compareTo(Object o) {
        myClass m = (myClass) o;
        if(this.price!= m.price){
            return Double.compare(this.price,((myClass) o).price);
        }else {
            return -this.name.compareTo(m.name);
        }
    }
}

 

 

 

 Arrays.sort(m, new Comparator() {
            @Override
            public int compare(myClass o1, myClass o2) {
                return Double.compare(o1.getPrice(),o2.getPrice());
            }
        });