?? ex15.java
字號:
// interfaces/Ex15.java
// TIJ4 Chapter Interfaces, Exercise 15, page 330
/* Modify the previous exercise by creating an abstract class and
* inheriting that into the derived class.
*/
interface History {
void u();
void v();
}
interface Exam {
void w();
void x();
}
interface Labs {
void y();
void z();
}
interface Workup extends History, Exam, Labs {
void zz();
}
abstract class Doctor {
private int i = 0;
abstract void doc();
}
class Anesthesiologist extends Doctor implements Workup {
private int j = 0;
public void u() {}
public void v() {}
public void w() {}
public void x() {}
public void y() {}
public void z() {}
public void zz() {}
public void doc() {} // must override abstract method in Doctor
}
public class Ex15 {
public static void m1(History history) { history.v(); }
public static void m2(Exam exam) { exam.w(); }
public static void m3(Labs labs) { labs.y(); }
public static void m4(Workup workup) { workup.zz(); }
public static void main(String[] args) {
Anesthesiologist anes = new Anesthesiologist();
m1(anes);
m2(anes);
m3(anes);
m4(anes);
}
}
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