java.lang.IllegalArgumentException: argument type mismatch

Question

param을 이용해서 클래스의 메소드 이름까지는 읽어왔는데method.invoke 옵션을 쓰려고 하니까 자꾸 argument type mismatch라고 뜨네요제가 넣어준 data가 잘못된걸까요? 에러&#96;&#96;&#96;java.lang.IllegalArgumentException: argument type mismatch at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at kr.com.inspect.rule.RuleCompiler.runObject(RuleCompiler.java:135) at kr.com.inspect.controller.PostgreController.xlsxDir(PostgreController.java:166)&#96;&#96;&#96; Rulecompiler.java&#96;&#96;&#96; // Test.class 안의 runMethod 메서드 실행 public void runObject(Object obj, PostgreService postgreService) throws Exception { // int[] list &#61; {1, 2, 3}; System.out.println(&#34;런오브젝트 시작&#34;); // Class arguments[] &#61; new Class[]{postgreService.getClass()}; Data data &#61; new Data(); data.setPostgreService(postgreService); System.out.println(data); System.out.println(postgreService); // Source를 만들때 지정한 Method를 실행 // runMethod 메소드 지정// try {// Method objMethod &#61; obj.getClass().getMethod(&#34;runMethod&#34;, listArguments);//// // 인자로 list를 보냄// Object result &#61; objMethod.invoke(obj, list);//// return (int)result;// }catch (Exception e) {// e.printStackTrace();// } // data 가 인자로 보내져야 하는데 보내지질 않음 System.out.println(&#34;before Method&#34;); try { Class[] params &#61; null; Method[] methods &#61; obj.getClass().getDeclaredMethods(); for (Method method : methods) { params &#61; method.getParameterTypes(); System.out.println(params); } // 메소드 가져오기 (실행 됨) Method objMethod &#61; obj.getClass().getMethod(&#34;runMethod&#34;, params[0]); System.out.println(objMethod.getName()); // 문제 부분 invoke (java.lang.IllegalArgumentException: argument type mismatch) // The problem occurs here!!!!!!!!!!!!! objMethod.invoke(obj, data); System.out.println(objMethod); System.out.println(objMethod.getTypeParameters()); //objMethod. System.out.println(&#34;after Method&#34;); } catch (Exception e) { e.printStackTrace(); }// System.out.println(&#34;after Method&#34;);// Object result &#61; objMethod.invoke(obj, postgreService);// System.out.println(&#34;after invoke&#34;);// return (int) result; }&#96;&#96;&#96;Test.java&#96;&#96;&#96;package kr.com.inspect.rule; public class Test { public void runMethod(Data data) throws Exception { data.metadata(); }}&#96;&#96;&#96; Data.java&#96;&#96;&#96;package kr.com.inspect.rule; import kr.com.inspect.dto.Metadata;import kr.com.inspect.service.PostgreService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.beans.factory.annotation.Qualifier;import org.springframework.stereotype.Component; import java.util.List; &#64;Componentpublic class Data { private PostgreService postgreService; public Data() { } &#64;Autowired public void setPostgreService(PostgreService postgreService) { this.postgreService &#61; postgreService; } public PostgreService getPostgreService() { return this.postgreService; } public void metadata() { // System.out.println(&#34;metadata() called&#34;); System.out.println(postgreService); //List<Metadata> metadata &#61; postgreService.getMetadata(); //System.out.println(metadata.get(1)); //return metadata; //Metadata metadata &#61; postgreService.getMetadataById(id); //System.out.println(metadata); //return metadata; // return true; // TODO Auto-generated method stub }} &#96;&#96;&#96;

초보자1212 · Answer

type mismatch 니까 넘기는 곳과 받는 곳의 데이터 타입이 불일치라서 그런거아닌가하네요

hua · Answer

단순히 System.out.println(postgreService); 출력만 하면 되서 void로 설정한건데 문제인건가요?

java.lang.IllegalArgumentException: argument type mismatch

2개의 답변

#invoke 목록