s-day03--Collections里面的sort方法以及Comparable接口

s-day03/src/com/inmind/colletions04/Student.java

@@ -0,0 +1,47 @@
+package com.inmind.colletions04;
+
+import java.util.Objects;
+
+public class Student implements Comparable<Student> {
+    String name;
+    int age;
+
+    public Student(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    @Override
+    public String toString() {
+        return "Student{" +
+                "name='" + name + '\'' +
+                ", age=" + age +
+                '}';
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Student student = (Student) o;
+        return age == student.age && Objects.equals(name, student.name);
+    }
+
+    @Override
+    public int hashCode() {
+        int result = Objects.hashCode(name);
+        result = 31 * result + age;
+        return result;
+    }
+
+    /*
+    排序功能方法
+    我-它：升序
+    它-我：降序
+     */
+    @Override
+    public int compareTo(Student s) {
+//        return this.age-s.age;//升序
+        return s.age-this.age;//降序
+    }
+}