testface2.java

来自「JAVA程序设计课程中各章节的程序实例。」· Java 代码 · 共 37 行

//Interface
interface callback
{
	void callback(int param);
}

class client2 implements callback {

public void callback (int p) {

System.out.println("Another version of callback");

System.out.println("p Squared is " + (p*p));

}

}

class testface2 {

	public static void main(String args[]) {

		callback c = new client();

		client2 c2 = new client2();

		c.callback(42);

		c = c2; // Now c refers to client2 object.

		c.callback(42);



	}

}