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我試圖建立一個優先級隊列,但是當我測試它時似乎有一些不一致。我忽略了方法compareTo()
,但不知何故它返回了年齡最小的學生。這是爲什麼 ?是不是22歲(最高)的學生?下面是代碼:優先隊列實現
public class Student implements Comparable<Student> {
private String name;
private int age;
public Student(int i) {
age = i;
}
public int getAge(){
return this.age;
}
public int print(){
return age;
}
@Override
public int compareTo(Student s) {
if(this.age < s.getAge()){return -1;}
else if(this.age > s.getAge()){return 1;}
else{return 0;}
}
public static void main(String[] args) {
Queue<Student> q = new PriorityQueue<Student>();
q.offer(new Student(21));
q.offer(new Student(18));
q.offer(new Student(22));
Student s = q.poll();
System.out.println(s.print());
}
非常感謝您的幫助 – user2326847 2013-05-11 12:31:08