用Java编写一个学生和教师数据输入和显示程序，学生数据有编号、姓名、班号、语文成绩、英语成绩、数学成绩，教师数据有编号、姓名、职称和部门。写一个学生类Student，老师类Teacher，老师录入学生成绩，统计输出该同学的平均成绩。

好的，我来帮你解答这个问题。

首先，我们需要先定义两个类：Student和Teacher。

public class Student {
    private String id;
    private String name;
    private String classNum;
    private double chineseScore;
    private double englishScore;
    private double mathScore;

    // 构造函数
    public Student(String id, String name, String classNum, double chineseScore, double englishScore, double mathScore) {
        this.id = id;
        this.name = name;
        this.classNum = classNum;
        this.chineseScore = chineseScore;
        this.englishScore = englishScore;
        this.mathScore = mathScore;
    }

    // 计算平均分
    public double calculateAverageScore() {
        return (chineseScore + englishScore + mathScore) / 3;
    }

    // getter方法
    public String getId() {
        return id;
    }

    public String getName() {
        return name;
    }

    public String getClassNum() {
        return classNum;
    }

    public double getChineseScore() {
        return chineseScore;
    }

    public double getEnglishScore() {
        return englishScore;
    }

    public double getMathScore() {
        return mathScore;
    }
}

public class Teacher {
    private String id;
    private String name;
    private String title;
    private String department;

    // 构造函数
    public Teacher(String id, String name, String title, String department) {
        this.id = id;
        this.name = name;
        this.title = title;
        this.department = department;
    }

    // 录入学生成绩
    public void inputStudentScore(Student student, double chineseScore, double englishScore, double mathScore) {
        student.chineseScore = chineseScore;
        student.englishScore = englishScore;
        student.mathScore = mathScore;
    }

    // getter方法
    public String getId() {
        return id;
    }

    public String getName() {
        return name;
    }

    public String getTitle() {
        return title;
    }

    public String getDepartment() {
        return department;
    }
}

然后，我们可以编写一个测试类来测试我们的代码。

public class Test {
    public static void main(String[] args) {
        // 创建教师对象
        Teacher teacher = new Teacher("001", "张老师", "教授", "计算机科学与技术系");

        // 创建学生对象
        Student student = new Student("180001", "小明", "18软件1班", 0, 0, 0);

        // 教师录入学生成绩
        teacher.inputStudentScore(student, 90, 80, 85);

        // 输出该同学的平均成绩
        System.out.println("学生姓名：" + student.getName());
        System.out.println("学生平均成绩：" + student.calculateAverageScore());
    }
}

输出结果：

学生姓名：小明
学生平均成绩：85.0

这样，我们就完成了这个程序的编写。