Changes between Version 8 and Version 9 of waue/2009/0717

Timestamp:

Jul 17, 2009, 2:48:00 PM (15 years ago)

Author:

waue

Comment:

--

waue/2009/0717

@@ -83 +83 @@
    * interface的成員可看成是 '''public static final'''的，不過在interface中一般不定義數據成員
  * 從某種意義上說，interface是一種特殊形式的abstract class。 
+
+ == 範例 ==
+
+{{{
+#!java
+interface CanFight {
+  void fight();
+}
+
+interface CanSwim {
+  void swim();
+}
+
+interface CanFly {
+  void fly();
+}
+
+interface CanClimb {
+  void climb();
+}
+
+class ActionCharacter {
+  public void fight() {}
+}
+
+class Hero extends ActionCharacter
+  implements CanFight, CanSwim, CanFly, CanClimb {
+  public void swim() {}
+  public void fly() {}
+  public void climb() {}
+}
+
+public class Ex09 {
+  static void t(CanFight x) {
+    x.fight();
+  }
+  static void u(CanSwim x) {
+    x.swim();
+  }
+  static void v(CanFly x) {
+    x.fly();
+  }
+  static void z(CanClimb x) {
+    x.climb();
+  }
+  static void w(ActionCharacter x) {
+    x.fight();
+  }
+  public static void main(String[] args) {
+    Hero h = new Hero();
+    t(h); // Treat it as a CanFight
+    u(h); // Treat it as a CanSwim
+    v(h); // Treat it as a CanFly
+    z(h); // Treat it as a CanClimb
+    w(h); // Treat it as an ActionCharacter
+  }
+}
+}}}