This is a typical bidirectional consistency problem. It is well discussed in this link as well as this link. As per the articles in the previous 2 links you need to fix your setters in both sides of the bidirectional relationship. An example setter for the One side is in this link. An example setter … Read more
As you are creating a database from scratch, you could use: Here is an identical scenario.
Your MainController doesn’t have a zero-argument constructor. If the FXMLLoader encounters a fx:controller attribute on the root element, it attempts to create an instance of that controller by (effectively) calling the zero-argument constructor of the class specified in the attribute. To fix this (the simplest way), remove the fx:controller attribute from the FXML file, and … Read more
Please remove M2_HOME as environment variable, it is already set by the mvn script. The only things you need to do is: add apache-maven-3.x.x/bin to your path, set JAVA_HOME as environment variable. So no need to add %JAVA_HOME%/bin to your path Try to run mvn -v from /Library/Maven-3.3.3/bin/ folder first to confirm the installation is … Read more
You may use Graphics.drawPolygon(int[], int[], int) where the first int[] is the set of x values, the second int[] is the set of y values, and the int is the length of the array. (In a triangle’s case, the int is going to be 3) Example: Output:
You should include cascade=”all” (if using xml) or cascade=CascadeType.ALL (if using annotations) on your collection mapping. This happens because you have a collection in your entity, and that collection has one or more items which are not present in the database. By specifying the above options you tell hibernate to save them to the database when saving their parent.
Finally found a forum post that outlined what the registry is supposed to look like when not broken. Added key HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment Added String Value CurrentVersion = 1.7 Added key HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment\1.7 Added String Value JavaHome = C:\Program Files\Java\jre7 Running cmd java -version and Eclipse now works
None of these did it for me. I did find the answer on MSDN. There were hints to it though. The architecture in the error is referring to 32 vs 64 bits. My solution was to find out which my app is running under (Access) which 2010 is 32b. I found this by looking in … Read more
From the community documentation: hibernate.hbm2ddl.auto Automatically validates or exports schema DDL to the database when the SessionFactory is created. With create-drop, the database schema will be dropped when the SessionFactory is closed explicitly. e.g. validate | update | create | create-drop So the list of possible options are, validate: validate the schema, makes no changes to … Read more
From Effective Java, Item #43 – “Return empty arrays or collections, not null” demonstrates returning an empty collection and perhaps even demonstrates using these emptyList(), emptySet(), and emptyMap() methods on the Collections class to get an empty collection that also has the additional benefit of being immutable. From Item #15 “Minimize Mutability”. From Collections-emptySet-Collections-emptyList-Collections Its a type of programming idiom. This is for people that do not … Read more