java需求:键盘录入3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

好的，请按照以下步骤进行操作：

1. 创建一个名为`Student`的Java类，该类包含学生的姓名和各科成绩。具体代码如下：

public class Student {
    private String name;
    private int chineseScore;
    private int mathScore;
    private int englishScore;

    public Student(String name, int chineseScore, int mathScore, int englishScore) {
        this.name = name;
        this.chineseScore = chineseScore;
        this.mathScore = mathScore;
        this.englishScore = englishScore;
    }

    public String getName() {
        return name;
    }

    public int getTotalScore() {
        return chineseScore + mathScore + englishScore;
    }
}

2. 在主类中，使用`Scanner`类从键盘录入学生信息，并将学生放入一个列表中。然后按照总分从高到低排序并输出到控制台。具体代码如下：

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        List<Student> students = new ArrayList<>();

        Scanner scanner = new Scanner(System.in);
        for (int i = 0; i < 3; i++) {
            System.out.println("请输入第" + (i + 1) + "个学生的姓名：");
            String name = scanner.nextLine();

            System.out.println("请输入第" + (i + 1) + "个学生的语文成绩：");
            int chineseScore = scanner.nextInt();

            System.out.println("请输入第" + (i + 1) + "个学生的数学成绩：");
            int mathScore = scanner.nextInt();

            System.out.println("请输入第" + (i + 1) + "个学生的英语成绩：");
            int englishScore = scanner.nextInt();

            scanner.nextLine(); // 读取换行符

            Student student = new Student(name, chineseScore, mathScore, englishScore);
            students.add(student);
        }

        Collections.sort(students, new Comparator<Student>() {
            @Override
            public int compare(Student s1, Student s2) {
                return s2.getTotalScore() - s1.getTotalScore();
            }
        });

        System.out.println("按总分从高到低排序的学生信息如下：");
        for (Student student : students) {
            System.out.println("姓名：" + student.getName() + "，总分：" + student.getTotalScore());
        }
    }
}

以上代码实现了键盘录入3个学生信息，并按照总分从高到低输出到控制台。你可以根据需求进行适当的修改。