- Java code
public class Person { public String name="aaa"; public Person(){ System.out.println("person"); } public Person(String name){ System.out.println(name); } private Person(List list){ System.out.println("list"); }}- Java code
public void test3() throws Exception{ Class cla=Class.forName("com.itcast.reflect.Person"); Constructor c = cla.getDeclaredConstructor(List.class); c.setAccessible(true); Person p = (Person) c.newInstance(new ArrayList()); System.out.println(p.name); }运行后出错如下：java.lang.NoSuchMethodException: com.itcast.reflect.Person.<init>(java.awt.List)
at java.lang.Class.getConstructor0(Unknown Source)
at java.lang.Class.getDeclaredConstructor(Unknown Source)
at com.itcast.reflect.demo2.test3(demo2.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:70)
at org.junit.internal.runners.TestMethod.runTestUnprotected(TestMethod.java:75)
at org.junit.internal.runners.TestMethod$2.run(TestMethod.java:148)
at org.junit.internal.runners.Roadie.runProtected(Roadie.java:81)
at org.junit.internal.runners.TestMethod.runTestProtected(TestMethod.java:146)
at org.junit.internal.runners.TestMethod.run(TestMethod.java:139)
at org.junit.internal.runners.JUnit4ClassRunner.invokeTestMethod(JUnit4ClassRunner.java:88)
at org.junit.internal.runners.JUnit4ClassRunner.runMethods(JUnit4ClassRunner.java:51)
at org.junit.internal.runners.JUnit4ClassRunner$1.run(JUnit4ClassRunner.java:44)
at org.junit.internal.runners.Roadie.runProtected(Roadie.java:81)
at org.junit.internal.runners.TestClass.runProtected(TestClass.java:100)
at org.junit.internal.runners.JUnit4ClassRunner.run(JUnit4ClassRunner.java:42)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
请高手指教……
------解决方案--------------------
java.awt.List？
------解决方案--------------------
private Person(List list)这里的List是java.awt.List，传入的参数是ArrayList，ArrayList并没有继承或实现java.awt.List
------解决方案--------------------
引入jar 包时引错了， 应该引入 java.util.List,而不是 java.awt.List
------解决方案--------------------
刚才运行了下，你用java.util.List，是可以执行的