小白求助，如何解决要求？？？？？？

public class JsonText {

public static void main(String[] args) {

Student student = new Student();

System.out.println(student);

}

}

class Student{

private String name;

private Integer age;

private char sex;

private float score;

/**

* 不建议用isPass,容易发生错误

*/

private Boolean isPass;

public Student() {
    this.name = "张三";
    this.age = 18;
    this.sex = '男';
    this.score = 66.6f;
    this.isPass = Boolean.TRUE;
}
@Override
public String toString() {
    return "Student{" +
            "name='" + name + '\'' +
            ", age=" + age +
            ", sex=" + sex +
            ", score=" + score +
            ", isPass=" + isPass +
            '}';
}

}