diamondinheritance13.java

Thinking in Java第四版 课后习题的源码

// interfaces/DiamondInheritance13.java
// TIJ4 Chapter Interfaces, Exercise 13, page 328
/* Create an interface, and inherit two new interfaces from that
* interface. Multiply inherit a third interface from the second
* two. 
*/

interface CanDo {
	void doIt();
}

interface CanDoMore extends CanDo {
	void doMore();
}

interface CanDoFaster extends CanDo {
	void doFaster();
}

interface CanDoMost extends CanDoMore, CanDoFaster {
	void doMost();
}

class Doer implements CanDoMost {
	public void doIt() {}
	public void doMore() {}
	public void doFaster() {}
	public void doMost() {}
}

public class DiamondInheritance13 {
	public static void main(String[] args) {
		Doer d = new Doer();
		((CanDoMore)d).doMore();
		((CanDoFaster)d).doFaster();
		((CanDo)d).doIt();	
	}
}