创建人类Preson，在以该类为父类创建一个学生子类Student，子类成员包括从父类继承来的成员和新增成员两部分，每部分包括数据成员和成员函数，再定义一个测试类TestStudent输出Student类的信息，生成Java

代码如下：

// 定义人类
class Person {
    private String name;
    private int age;
    
    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }
    
    public String getName() {
        return name;
    }
    
    public int getAge() {
        return age;
    }
    
    public void setName(String name) {
        this.name = name;
    }
    
    public void setAge(int age) {
        this.age = age;
    }
    
    public void introduce() {
        System.out.println("I am a person. My name is " + name + ", and I am " + age + " years old.");
    }
}

// 定义学生类
class Student extends Person {
    private String school;
    private String grade;
    
    public Student(String name, int age, String school, String grade) {
        super(name, age);
        this.school = school;
        this.grade = grade;
    }
    
    public String getSchool() {
        return school;
    }
    
    public String getGrade() {
        return grade;
    }
    
    public void setSchool(String school) {
        this.school = school;
    }
    
    public void setGrade(String grade) {
        this.grade = grade;
    }
    
    public void study() {
        System.out.println("I am a student. I am studying in " + school + ", and my grade is " + grade + ".");
    }
}

// 定义测试类
class TestStudent {
    public static void main(String[] args) {
        Student s = new Student("Tom", 18, "ABC High School", "Grade 12");
        s.introduce();
        s.study();
    }
}

以上代码中，Person类为父类，Student类为子类，TestStudent类为测试类。在Student类中，新增了school和grade两个成员变量，以及study()方法。在TestStudent类中，创建了一个Student对象s，并调用其introduce()和study()方法，输出其信息。