[20-05-13][Thinking in Java 13]Java Interfaces 3 - Multiple Interfaces
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内容图文
1
package
test_11_1;
2
3
public
interface
CanFight {
4
5
void
fight();
6 }
1
package
test_11_1;
2
3
public
interface
CanSwim {
4
5
void
swim();
6 }
1
package
test_11_1;
2
3
public
interface
CanFly{
4
5
void
fly();
6 }
1
package
test_11_1;
2
3
public
interface
CanFlyStop {
4
5
void
flyStop();
6 }
1
package
test_11_1;
2
3
public
interface CanFlyHigh extends CanFly, CanFlyStop{
45void flyHigh();
6 }
1
package
test_11_1;
2
3
public
interface CanFlyLow extends CanFly, CanFlyStop{
45void flyLow();
6 }
1
package
test_11_1;
2
3
public
class
ActionCharacter {
4
5
public
void
fight() {
6 System.out.println("ActionCharacter fight");
7 }
8 }
1
package
test_11_1;
2
3
public
class Hero extends ActionCharacter implements CanFight, CanSwim, CanFlyHigh, CanFlyLow {
4 5// 未直接继承接口CanFly和CanFlyStop，但CanFlyHigh及CanFlyLow继承接口CanFlyHigh和CanFlyStop
6// fight()在基类ActionCharacter中已提供定义，所以即使Hero中未显式提供fight定义，也可以创建Hero对象 7 @Override
8publicvoid fly() {
9 System.out.println("Hero fly");
10 }
1112 @Override
13publicvoid flyStop() {
14 System.out.println("Hero flyStop");
15 }
1617 @Override
18publicvoid flyLow() {
19 System.out.println("Hero flyLow");
20 }
2122 @Override
23publicvoid flyHigh() {
24 System.out.println("Hero flyHigh");
25 }
2627 @Override
28publicvoid swim() {
29 System.out.println("Hero flySwim");
30 }
3132 }
1
package
test_11_1;
2
3
public
class
Adventure {
4
5
public
static
void
t(CanFight x) {
6
x.fight();
7
}
8
9
public
static
void
u(CanSwim x) {
10
x.swim();
11
}
12
13
public
static
void
v(CanFly x) {
14
x.fly();
15
}
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17
public
static
void
w(CanFlyStop x) {
18
x.flyStop();
19
}
20
21
public
static
void
x(CanFlyHigh x) {
22
x.flyHigh();
23
x.fly();
24
x.flyStop();
25
}
26
27
public
static
void
y(CanFlyLow x) {
28
x.flyLow();
29
x.fly();
30
x.flyStop();
31
}
32
33
public
static
void
z(ActionCharacter x) {
34
x.fight();
35
}
36
37
public
static
void
main(String[] args) {
38
39 Hero hero = new Hero();
40// Hero可依次向上转型为每一个接口41 t(hero);
42 u(hero);
43 v(hero);
44 w(hero);
45 x(hero);
46 y(hero);
47 z(hero);
48 }
4950 }
结果如下：
ActionCharacter fight
Hero flySwim
Hero fly
Hero flyStop
Hero flyHigh
Hero fly
Hero flyStop
Hero flyLow
Hero fly
Hero flyStop
ActionCharacter fight
原文：https://www.cnblogs.com/mirai3usi9/p/12885377.html
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