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Java Reflection, java.lang.IllegalAccessException Error


Java Reflection, java.lang.IllegalAccessException Error

By : Arun Dharmar
Date : November 21 2020, 07:01 PM
Does that help what function are you trying to execute exactly? looks to me like you are just picking the first method without actually checking what it is. try to pick a specific method which is public.
code :


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java.lang.IllegalAccessException: Can not call newInstance() on the Class for java.lang.Class

java.lang.IllegalAccessException: Can not call newInstance() on the Class for java.lang.Class


By : HyperHD Games
Date : March 29 2020, 07:55 AM
hope this fix your issue In my spring project, I implemented a generic controller for serve as base for all my controller (each entity from my project have one specific controller). Right now, when I am trying access a view mapped by the controller, I am facing this error: , Your base class is misleading. You have
code :
@SuppressWarnings("unchecked")
public controller(Class<?> classe) {
    this.entity = (E) classe;
}
private final E entity;
private final Class<E> entityClass;
@SuppressWarnings("unchecked")
public controller(Class<?> classe) {
    this.entity = (E) classe;
}
public controller(Class<E> classe) {
    this.entityClass = classe;
}
return new ModelAndView("privado/"+this.entity.getClass().getName()+"/cadastra", "command", this.entity.getClass().newInstance());
return new ModelAndView("privado/"+this.entityClass.getName()+"/cadastra", "command", this.entityClass.newInstance());
java.lang.IllegalAccessException: can not access a member of class java.util.Collections$UnmodifiableCollection with mod

java.lang.IllegalAccessException: can not access a member of class java.util.Collections$UnmodifiableCollection with mod


By : TheProApps
Date : March 29 2020, 07:55 AM
will be helpful for those in need I have classes PrimitiveProperty and ComplexProperty and the interface Property. I want to create an implementation of Property which enforces an empty unmodifiable Set of Property instances as return value of Property.getProperties, e.g. , Here is the problem:
code :
leaf="#{item.properties.isEmpty()}"
Set<Object> set = Collections.unmodifiableSet(new HashSet<>());
for (Method method : set.getClass().getMethods()) {
    if ("isEmpty".equals(method.getName())) {
        method.invoke(set); // IllegalAccessException.
    }
}
leaf="#{empty item.properties}"
Unity - Android 6.0 - Crash with java.lang.IllegalAccessException: java.lang.Class<com.unity3d.player.n$1> is not

Unity - Android 6.0 - Crash with java.lang.IllegalAccessException: java.lang.Class<com.unity3d.player.n$1> is not


By : Zig
Date : March 29 2020, 07:55 AM
java.lang.RuntimeException:IllegalAccessException

java.lang.RuntimeException:IllegalAccessException


By : Xab3r
Date : March 29 2020, 07:55 AM
like below fixes the issue logcat is showing me error , You should make it public like below:
code :
public class DomainRegistration extends AppCompatActivity {
Java reflection error Java.lang.NoSuchMethodException, but method exists

Java reflection error Java.lang.NoSuchMethodException, but method exists


By : SMA3699048
Date : March 29 2020, 07:55 AM
Does that help I can't get to work java reflection in Spring boot with Controller and JdbcTemplate. , Your code attempts to call the method on an instance of Class.
code :
Method method = repository.getDeclaredMethod("selectOne", Long.class);
CompanyRepository repsitoryObj = new CompanyRepository();
method.invoke(repsitoryObj, id);
public JsonResponseDataModel selectOneAuto(Long id, CompanyRepository repository, HttpServletResponse response){

    final JsonResponseDataModel result = new JsonResponseDataModel();
    System.out.println("The name of class is " + repository.getClass().getName());

    Method[] methods = repository.getClass().getMethods();
    for (Method method : methods) {
    System.out.println("Method: " + method.getName());
    }

    try {
    //Method method = repository.getClass().getMethod("selectOne", Long.class);
    Method method = repository.getClass().getDeclaredMethod("selectOne", Long.class);
    method.invoke(repository, id);

    logger.info("selectOneAuto : id={} ", id);
    } catch (EmptyResultDataAccessException e) {
    result.setEmptyResultDataAccessException("id", id.toString());
    } catch (DataAccessException e) {            
    e.printStackTrace();            
    } catch (NoSuchMethodException e) {            
    e.printStackTrace();            
    } catch (IllegalAccessException e) {            
    e.printStackTrace();            
    } catch (InvocationTargetException e) {            
    e.printStackTrace();            
    }
    return result;
}
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