Java LinkedList排序

LinkedList通过Collections.sort进行排序，代码如下：

降序

public class Person1 implements Comparable < Person1 > {
    private Float height;
    private String name;

    Person1(float height) {
        this.height = height;
    }

    public Float getHeight() {
        return height;
    }

    public void setHeight(float height) {
        this.height = height;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override public int compareTo(Person1 p) {
        if (this.getHeight() < p.getHeight()) {
            return 1;

        } else if (this.getHeight() > p.getHeight()) {
            return - 1;
        } else {
            return 0;
        }
    }
}

public class Question3_1 {

    public static void main(String[] args) {
        Person1 p1 = new Person1(23.4f);
        p1.setName("Stud1");
        Person1 p2 = new Person1(2.34f);
        p2.setName("Stud2");
        Person1 p3 = new Person1(34.32f);
        p3.setName("Stud3");
        Person1 p4 = new Person1(56.45f);
        p4.setName("Stud4");
        Person1 p5 = new Person1(21.4f);
        p5.setName("Stud5");

        LinkedList < Person1 > al = new LinkedList < Person1 > ();

        al.add(p1);
        al.add(p2);
        al.add(p3);
        al.add(p4);
        al.add(p5);

        Collections.sort(al); //这里控制降序
        for (Person1 p: al) System.out.println(p.getName() + " " + p.getHeight());
    }
}

运行结果：

Stud4 56.45
Stud3 34.32
Stud1 23.4
Stud5 21.4
Stud2 2.34

升序

修改上面代码 Collections.sort(al,Collections.reverseOrder());//更改为升序

	运行结果：



	Stud2 2.34
Stud5 21.4
Stud1 23.4
Stud3 34.32
Stud4 56.45