Mega Code Archive
Two ways that a class can implement multiple interfaces
<![CDATA[
// : c08:MultiInterfaces.java
// Two ways that a class can implement multiple interfaces.
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
interface A {
}
interface B {
}
class X implements A, B {
}
class Y implements A {
B makeB() {
// Anonymous inner class:
return new B() {
};
}
}
public class MultiInterfaces {
static void takesA(A a) {
}
static void takesB(B b) {
}
public static void main(String[] args) {
X x = new X();
Y y = new Y();
takesA(x);
takesA(y);
takesB(x);
takesB(y.makeB());
}
} ///:~
]]>