直接上代码
public class Student{
public int age;
public double score;
public String name;
}
public class StudentSortUtil {
Comparator<Student> studentComparatorByAge = new Comparator<Student>() {
@Override
public int compare(Student lhs, Student rhs) {
if(lhs.age > rhs.age)
return 1;
return -1; //注意此处不是0
}
};
Comparator<Student> StudentComparatorByScore = new Comparator<Student>() {
@Override
public int compare(Student lhs, Student rhs) {
if(lhs.score > rhs.score)
return 1;
return -1;
}
};
public void sortByAge(ArrayList<Student> studentArray) {
Collections.sort(studentArray, studentComparatorByAge);
}
public void sortByScore(ArrayList<MovieBean> studentArray) {
Collections.sort(studentArray, studentComparatorByScore);
}
}
//使用
ArrayList<Student> studentArray;
...
new StudentSortUtil().sortByScore(studentArray);
