2、定义student类，其中包括4个变量（name，age，gender，score），一个构造方法和show（）方法。 name为string类型，用于存储学生姓名； age为int类型，用于存储

public  class  Student {

    private  String name;
    private  int  age;
    private  boolean  gender;
    private  int  score;

    public  Student(String name,  int  age,  boolean  gender,  int  score) {
        this .name = name;
        this .age = age;
        this .gender = gender;
        this .score = score;
    }

    public  void  show() {
        System.out.println( "姓名：" +name);
        System.out.println( "年龄：" +age);
        System.out.println( "性别：" +(gender? "女" : "男" ));
        System.out.println( "成绩：" +score);
    }

    public  static  void  main(String[] args) {
        Student st =  new  Student( "小明" , 16 , false , 98 );
        st.show();
    }

}