import java.util.Arrays;
import java.util.Comparator;
public class TestComparator {
public static class Student {
public String name;
public int id;
public int age;
public int gao;
public Student(String name, int id, int age,int gao) {
this.name = name;
this.id = id;
this.age = age;
this.gao = gao;
}
}
public static class IdAscendingComparator implements Comparator<Student> {
@Override
public int compare(Student o1, Student o2) {
return o1.id - o2.id;
}
}
public static class IdDescendingComparator implements Comparator<Student> {
@Override
public int compare(Student o1, Student o2) {
return o2.id - o1.id;
}
}
public static class AgeAscendingComparator implements Comparator<Student> {
@Override
public int compare(Student o1, Student o2) {
return o1.age - o2.age;
}
}
public static class AgeDescendingComparator implements Comparator<Student> {
@Override
public int compare(Student o1, Student o2) {
return o2.age - o1.age;
}
}
public static class gaoComparator implements Comparator<Student> {
@Override
public int compare(Student o1, Student o2) {
return o1.gao - o2.gao;
}
}
public static class Descending implements Comparator<Student> {
@Override
public int compare(Student o1, Student o2) {
return o2.gao - o1.gao;
}
}
public static void printStudents(Student[] students) {
for (Student student : students) {
System.out.println("Name : " + student.name + ", Id : " + student.id + ", Age : " + student.age + ", gao : " + student.gao);
}
System.out.println("===========================");
}
public static void main(String[] args) {
Student student1 = new Student("A", 1, 23 ,156);
Student student2 = new Student("B", 2, 21,199);
Student student3 = new Student("C", 3, 22,195);
Student[] students = new Student[]{student3, student2, student1};
printStudents(students);
Arrays.sort(students,new gaoComparator());
printStudents(students);
Arrays.sort(students,new Descending());
printStudents(students);
/*Arrays.sort(students, new IdAscendingComparator());
printStudents(students);
Arrays.sort(students, new IdDescendingComparator());
printStudents(students);
Arrays.sort(students, new AgeAscendingComparator());
printStudents(students);
Arrays.sort(students, new AgeDescendingComparator());
printStudents(students);*/
}
}