java反射出错，求助

Question

求助大神public void test4() throws Exception{
Class clazz=Class.forName("reflect.Person");
Constructor c=clazz.getDeclaredConstructor(List.class);
c.setAccessible(true);//暴力反射
Person p=(Person) c.newInstance(new ArrayList());
System.out.println(p.name);
} 
java.lang.IllegalArgumentException: argument type mismatch
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at reflect.demo2.test4(demo2.java:41)
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.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

Answer 1

package com;import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;public class Test
{
    public static void main( String[] args ) throws ClassNotFoundException, SQLException, NoSuchMethodException, SecurityException, InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException
    {
            Class clazz=Class.forName("com.Person");
            System.out.println(clazz);
            Constructor c=clazz.getDeclaredConstructor(List.class);
            c.setAccessible(true);//暴力反射
            Person p=(Person) c.newInstance(new ArrayList());
            System.out.println(p.name);
    }
}

Answer 2

看看有没有单独的只有list一个参数的构造器。

Answer 3

Person怎么写的？？？

Answer 4

public class Person
{
public Person(List list)
{

}
}
public void test4() throws Exception{
Class clazz=Class.forName("reflect.Person");
Constructor c=clazz.getDeclaredConstructor(List.class);
c.setAccessible(true);//暴力反射
Person p=(Person) c.newInstance(new ArrayList());
System.out.println(p);
} 
试过了，是可以的

Answer 5

private Person(List list)
    {
     System.out.println("list");
    
    }

Answer 6

package reflect;import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.List;public class Test { public static void main(String[] args) throws ClassNotFoundException, NoSuchMethodException, SecurityException, InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
Class clazz=Class.forName("reflect.Person");
Constructor c=clazz.getDeclaredConstructor(List.class);
c.setAccessible(true);//暴力反射
Person p=(Person) c.newInstance(new ArrayList());
System.out.println(p.name); }}
class Person{
String name = "哈哈";
private Person(List list){
System.out.println("OK");
}
}
//at reflect.demo2.test4(demo2.java:41)
看一下你这一行代码 应该是这个错误 新手猜测 错了求指教

Answer 7

demo2.java 第41行 应该是这个

Answer 8

person,有写错吗？？？