java泛型接口

泛型接口

测试代码

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 1 interface TestInterface<T> {
 2     void test(T item);
 3 }
 4 
 5 class TestInterfaceImp1 implements TestInterface<String> {
 6 
 7     @Override
 8     public void test(String item) {
 9         System.out.println(item);
10     }
11 }
12 
13 class TestInterfaceImp2<T> implements TestInterface<T> {
14 
15     @Override
16     public void test(T item) {
17         System.out.println(item);
18     }
19 }



​

调用代码

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 1         System.out.println("generic interface test");
 2         TestInterface<String> testInterface1 = new TestInterfaceImp1();
 3         testInterface1.test("hi");
 4         for (Method item : testInterface1.getClass().getMethods()) {
 5             if (item.getName() == "test") {
 6                 System.out.println(item.getParameterTypes()[0].getName());
 7             }
 8         }
 9 
10         TestInterface<String> testInterface2 = new TestInterfaceImp2<>();
11         testInterface2.test("hi");
12         for (Method item : testInterface2.getClass().getMethods()) {
13             if (item.getName() == "test") {
14                 System.out.println(item.getParameterTypes()[0].getName());
15             }
16         }



​

输出结果

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1 generic interface test
2 hi
3 java.lang.String
4 java.lang.Object
5 hi
6 java.lang.Object
​

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