1.　　编写一个程序，用户键盘录入若干个学生的姓名和分数（程序每次提示用户输入“Y”或“N”决定是否继续录入学生信息，如果用户输入“N”则用户输入完毕）。用户录入完毕后，程序按成绩由高到低的顺序输出学生的姓名和分数（姓名和分数之间用一个空格分割）。【说明：键盘输入可以使用Scanner类】-1. Write a program, the user' s keyboard input number of student names and scores (each time the program prompts the user to enter " Y"　or " N"　to determine whether to enter student information, if the user enters " N"　entered by the user is finished). After the user input is completed, the program results in descending order according to the output of the student' s name and scores (between names and scores divided by a space). [Note: You can use the keyboard to enter Scanner class}