java实列化十个学生，按分数排序

public class Demo {
    public static void main(String args[])
    {
        Student[] s = new Student[10];
       for(int i=0;i            s[i]=new Student((101+i)+"","Tom"+(i+1),(int)(Math.random()*100));
       }

       System.out.println("未排序前：");
       print(s);
       for(int i =0;i            for(int j =i;j                if(s[i].getChengji()                    Student ss =s[i];
                   s[i]=s[j];
                   s[j]=ss;
               }
           }
       }
       System.out.println("排序后：");
       print(s);
    }

    private static void print(Student[] s) {
        for(Student as: s)
            System.out.println(as);

    }
}

class Student {
    private String id;
    private String name;
    private double chengji;

    public Student(String id, String name, double chengji) {
        this.id = id;
        this.name = name;
        this.chengji = chengji;
    }

    public double getChengji() {
        return this.chengji;
    }

    public String toString(){
        return "编号："+this.id+", 名字："+this.name+",成绩："+this.chengji;
    }

}