java 接口 父子类的转换

//接口 父子类的转换
interface Teacher{

	public  void Teach();

}
class JavaTeacher3 implements Teacher{
String name;
public void Teach(){
System.out.println(name+“在ks”);
}
//study 学习
public void study(){
System.out.println(name+“在教英语”);
}
}
public class TestTeacher3{
public static void main(String[] args){
JavaTeacher3 jt = new JavaTeacher3();
jt.name = “李静”;
Teacher t = jt;
t.Teach();
//父类强制转换成子类
JavaTeacher3 jt1 = (JavaTeacher3)t;

		jt1.study();
	}

}