java练习2 - 黑马程序员技术交流社区 - 黑马程序员IT技术论坛

/**键盘录入5个学生信息(姓名,语文成绩,数学成绩,英语成绩),按照总分从高到低输出到控制台。 */
Scanner sc = new Scanner(System.in);
TreeSet<Student> ts = new TreeSet<>(new Comparator<Student>(){
public int compare(Student o1, Student o2) {
int result = o2.getScore()-o1.getScore();
return result==0?-1:result;
}
});
System.out.println("请输入学生信息,格式:姓名,语文成绩,数学成绩,英语成绩");
for(int i=0;i<5;i++){
String line = sc.nextLine();
try {
String[] arr = line.split("，");
int c = Integer.parseInt(arr[1]);
int m = Integer.parseInt(arr[2]);
int e = Integer.parseInt(arr[3]);
ts.add(new Student(arr[0], c, m, e));
} catch (Exception e) {
System.out.println("输入格式不正确，请重新输入！");
System.out.println("格式:姓名，语文成绩，数学成绩，英语成绩");
i--;
}
}
for(Student s:ts){
System.out.println(s);
}
}
}
class Student {
String name;
int chinese;
int math;
int english;
public Student(String name, int chinese, int math, int english) {
super();
this.name = name;
this.chinese = chinese;
this.math = math;
this.english = english;
}
@Override
public String toString() {
return "Student [name=" + name + ", chinese=" + chinese + ", math=" + math + ", english=" + english + "]";
}
public int getScore(){
return chinese+math+english;
}
}

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