创建一个教师类包含两个成员变量（姓名年龄）成员方法（展示的方法打印姓名年龄）2、创建一个测试类实例化两个对象并进行赋值，调用成员方法3、进行封装写出两个构造方法（无参和有参），getter和setter方法并通过getter和setter方法进行赋值和获取值

好的，下面是我的回答：

1. 创建教师类：

public class Teacher {
    private String name;
    private int age;

    public Teacher() {}

    public Teacher(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public void display() {
        System.out.println("姓名：" + name + "，年龄：" + age);
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

2. 创建测试类：

public class TestTeacher {
    public static void main(String[] args) {
        Teacher t1 = new Teacher();
        t1.setName("张三");
        t1.setAge(30);
        t1.display();

        Teacher t2 = new Teacher("李四", 35);
        t2.display();
    }
}

3. 封装：

public class Teacher {
    private String name;
    private int age;

    public Teacher() {}

    public Teacher(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public void display() {
        System.out.println("姓名：" + name + "，年龄：" + age);
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        if (age < 0 || age > 100) {
            System.out.println("年龄不合法！");
            return;
        }
        this.age = age;
    }
}