Sep 12, 2022 · I noticed during an inheritance exercise in class today that I was writing child classes under the parent class file, while the TA, when showing his solution, wrote his child classes in their own separate file.

The parent parameter is the parent directory of the child file name or relative file path. Where parent is a File instance, it is a directory file. Where parent is a String, it's simply that directory in pathname terms.

Mar 23, 2019 · Yes, there should be one class per file. Moreover, you are using the MyDate class in the Employee class, which you need to extend and you cannot extends more than one class, so it's better use the predefined Date class which is present java.util.Date .

Apr 12, 2018 · Use File's getParentFile() method and String.lastIndexOf() to retrieve just the immediate parent directory. Mark's comment is a better solution than lastIndexOf() : file.getParentFile().getName();

Jan 2, 2025 · File (File parent, String child): Creates a new File instance from a parent abstract pathname and a child pathname string. File (String pathname): Creates a new File instance by converting the given pathname string into an abstract pathname.

Jan 10, 2025 · Overriding in Java occurs when a subclass (child class) implements a method that is already defined in the superclass or Base Class. The overriding method must have the same name, parameters, and return type as the method in the parent class. This allows subclasses to modify inherited behavior while

Jan 30, 2019 · Below programs will illustrate the use of the getParent () function: Example 1: We are given a file object of a file, we have to get the Parent of the file object. Output: Example 2: We are given a file object of a directory, we have to get the Parent of the file object. Output:

If parent is null then the new File instance is created as if by invoking the single-argument File constructor on the given child pathname string. Otherwise the parent pathname string is taken to denote a directory, and the child pathname string is taken to denote either a directory or a file.

Sep 1, 2011 · The java doc for java.io.File(File parent, String child) says the following: If the child pathname string is absolute then it is converted into a relative pathname in a system-dependent way. That made me think that if I have the following code: