ex14.java

Java编程宝典Thinking in Java第四版（4th）原书章节后习题及答案

// interfaces/Ex14.java
// TIJ4 Chapter Interfaces, Exercise 14, page 330
/* Create three interfaces, each with two methods. Inherit a new interface
* that combines the three, adding a new method. Create a class by 
* implementing the new interface and also inheriting from a concrete class.
* Now write four methods, each of which takes one of the four interfaces as
* an argument. In main(), create an object of your class and pass it to 
* each of the methods.
*/

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();
}

class Doctor {
	private int i = 0;
	public 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 class Ex14 {
	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);
	}
}