Thus "FooBah" becomes "fooBah" and "X" becomes "x", but "URL" stays as "URL". Lower case, but in the (unusual) special case when there is more than one characterĪnd both the first and second characters are upper case, we leave it alone. This normally means converting the first character from upper case to Utility method to take a string and convert it to normal Java variable nameĬapitalization. When you are de-serializing objects (or similar use case such as creating a POJO from a database), for example reading a JSON string, the objects that you need. “FooBah” becomes “fooBah”, “Z” becomes “z”, “URL” becomes “URL f.set (objectOfTheClass, new ConcurrentHashMap<> ()) You can't set any value in null Object.Fieldset (Object object, Object value) sets the field represented by this Field object on the specified object argument to the specified new value. We check if the first two characters of the name are both upper caseĪnd if so leave it alone. .set java code examples Tabnine t How to use set method in Best Java code snippets using . It's worth reading Oracle Java Tutorial - Getting and Setting Field Values. However to support the occasional use of all upper-case names, In your example, you’re trying to set the field abc of the subclass but when you change the example to new TestReflection().update(), you’re setting the field foo of TestReflection instead. Normally, you want to know what class and field you’re accessing. Thus when we extract a property or event name from the middle of anĮxisting Java name, we normally convert the first character to lowerĬase. Even more is looping over the discovered fields and just setting all of them. The specification defines the capitalization rules for properties and getter/setter methods: A instance variable on the object is not required. The JavaBeans Specification says that for a property propertyName there should be a getter method getPropertyName() and/or a setter method setPropertyName().Ī property is defined by the only presence of the getter and setter methods and can also be a computed value. Confused about naming of JavaBean properties, with respect to getters and setters String childFieldName fieldName.substring(0, firstDotLocation) Field field object.getClass(). Section 8.8 in the linked document is entitled "Capitalization of inferred names" and briefly outlines how names of properties are derived. Where is the JavaBean property naming convention defined?Īlso, a direct link to the (PDF) specification.
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