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Cannot Set Int Field To Java.lang.class

To be clear, this is my BiroModel class look like: public class BiroModel extends Model { public String idbiro = ""; public String biro = ""; public BiroModel() { } public The key concept you should understand about updating Java objects via sun.misc.Unsafe is that all Java fields could be addressed by their offsets from the address of the object. You have made a bad choice for "the specified object". posted 5 years ago You are calling field.get with the wrong argument. have a peek here

set public void set(Object obj, Object value) throws NullPointerException, IllegalArgumentException, IllegalAccessException Sets the field represented by this Field object on the specified object argument to the specified new value. To get an instance from a class you can try these options: Class clazz = MyObject.class; // How to call the default constructor from the class: MyObject myObject1 = clazz.newInstance(); // asked 2 years ago viewed 7337 times active 1 month ago Upcoming Events 2016 Community Moderator Election ends Nov 22 Linked 2 IllegalArgumentException: the error message does not make sense Related If the field has a primitive type, the value is wrapped in an object before being returned, otherwise it is returned as is.

posted 5 years ago Oliver Bachmann wrote:if (field.getType().getName().equals("java.lang.String")) Don't do that, please. Access the value of a field1Java reflective assignment of field to null resulting in an IllegaArgumentException Hot Network Questions I am new in US (I just have SSN but no California Obtain a Field object for that field, make it accessible and update it. The Modifier class should be used to decode the modifiers.

How safe is 48V DC? Previous page: Getting and Setting Field Values Next page: Methods FAQs Search RecentTopics FlaggedTopics HotTopics Best Topics Register / Login Win a copy of Cybersecurity Lexicon or Cyber-Physical Attack Recovery Procedures: The problem is, I put instantiation code of new object (using reflection that is) only once, outside the inner for. You can read more about Java memory layout in Memory introspection using sun.misc.Unsafe and reflection article.

java reflection share|improve this question edited May 28 '09 at 9:44 Tom Hawtin - tackline 108k20157254 asked May 28 '09 at 9:24 colinjwebb 2,08652030 add a comment| 6 Answers 6 active get public Object get(Object obj) throws NullPointerException, IllegalArgumentException, IllegalAccessException Returns the value of the field represented by this Field, on the specified object. Why does the Minus World exist? http://stackoverflow.com/questions/24693853/can-not-set-java-lang-integer-field-to-java-lang-integer See Field.get for the detailed procedure.

Join them; it only takes a minute: Sign up Can not set java.lang.Integer field to java.lang.Integer up vote 7 down vote favorite 2 User declaration: @Entity public class User { @Id If the underlying field is not of type boolean, the method throws an IllegalArgumentException. getModifiers public int getModifiers() Returns the Java language modifiers for the field represented by this Field object, encoded in an integer. Posted By tech-ebooks (0 replies) Yesterday, 03:51 PM in Reviews / Advertising Learn Niche Technology , browse...

setShort public void setShort(Object obj, short s) throws NullPointerException, IllegalArgumentException, IllegalAccessException Sets the value of the field represented by this Field object on the specified object argument to the specified short https://coderanch.com/t/551103/java/java-lang-Reflection-throwing-error What physical evidence exists that shows motor proteins "walking" within a cell? If the specified object is not an instance of the class or interface declaring the underlying field, the method throws an IllegalArgumentException. I am new in US (I just have SSN but no California ID in 10 days) but I need change my Cash to Cashier Check to pay the Rent I just

posted 5 years ago What else could you use? navigate here See Field.get for the detailed procedure. You can even do that for arrays, for instance String[].class is the class for String arrays, and String[][].class is the class for arrays of arrays of Strings. If I just use '.class': Object value = field.get(theLoadedClass); I will get this error: java.lang.IllegalArgumentException: Can not set int field myClass.field to java.lang.Class Thanks.

I think Hibernate is confusing objects and ID fields. It can only convert types that are related as described by the specification for Class.isAssignableFrom(). setLong public void setLong(Object obj, long l) throws NullPointerException, IllegalArgumentException, IllegalAccessException Sets the value of the field represented by this Field object on the specified object argument to the specified long Check This Out Compare elements iteratively The cost of switching to electric cars?

getName public String getName() Returns the simple name of the field represented by this Field object. See Field.set for the detailed procedure. So instead of 'MyObject.class' I just have the '.class'.

in forum NetBeans Replies: 0 Last Post: 01-06-2010, 02:19 PM [SOLVED] [newbie] getting the constructors of a class (java.lang.reflect) By jon80 in forum New To Java Replies: 1 Last Post: 05-19-2009,

String s = new String((String)o); System.out.println( "String "+s ); } } } catch (java.lang.IllegalAccessException e) { e.printStackTrace(); } } } and this is the error message: Exception in thread "main" java.lang.IllegalArgumentException: The format is the Java language modifiers for the represented field, if any, followed by the field type, followed by a space, followed by the fully-qualified name of the class declaring Field.setInt() is invoked to set a field that is of the reference type Integer with a value of primitive type. If, after possible unwrapping, the new value cannot be converted to the type of the underlying field by an identity or a widening conversion, the method throws an IllegalArgumentException.

Here is the code which I wrote to experiment with the Field class : Java Code: import java.lang.reflect.*; class TwoSe { void field() { Container hm= new Container("Raeder"); Field[] f=hm.getClass().getDeclaredFields(); String If you're having problems using it, let's see how you're calling it. Here are the details of the Exception that I am getting : Java Code: Exception in thread "main" java.lang.RuntimeException: java.lang.IllegalArgumentException: Can not set java.lang.Object field Container.bag to java.lang.String at TwoSe.field(Sample.java:12) at this contact form Admittedly the documentation isn't all that clear, but it still doesn't support that choice.

If the underlying field's value cannot be converted to an int by an identity or a widening conversion, the method throws an IllegalArgumentException. The exception is for the final static field PI. Port fee transparency If I receive written permission to use content from a paper without citing, is it plagiarism? This is a second article in the "Forbidden Java actions" series started with Forbidden Java actions: object assignments, type conversions etc on the low level in Java.

SCJP 1.4 - SCJP 6 - SCWCD 5 - OCEEJBD 6 - OCEJPAD 6 How To Ask Questions How To Answer Questions Post Reply Bookmark Topic Watch Topic New Topic How do fonts work in LaTeX? This is computed as the exclusive-or of the hashcodes for the Field's declaring class name and its simple name. The value is automatically wrapped in an object if it has a primitive type.

All rights reserved. How to show that something is not completely metrizable Why is looping over find's output bad practice? and I'm a little bit baffled. Make it accessible and remove //'final' modifier for our 'CONSTANT' field Field modifiersField = Field.class.getDeclaredField( "modifiers" );

base is the owner of a field for instance fields and the Class object for static fields. Operator ASCII art How Did The Dred Scott Decision Contribute to the Civil War? int.class.isAssignableFrom(Integer.class) == false NoSuchFieldException for Non-Public Fields The astute reader may notice that if the FieldSpy example shown earlier is used to get information on a non-public field, it will fail: Why did the best potions master have greasy hair?

Otherwise, the value is retrieved from the underlying instance or static field. See Field.get for the detailed procedure. The new value is automatically unwrapped if the underlying field has a primitive type. Instead of writing things like these: String instance = new String(); String s = new String((String)o); Just write this, which has the same effect, except that it does not unnecessarily create

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