Macey  Legros

Macey Legros

1600676280

Java File Class Tutorial | Java.io File Class in Java Example

Java File class represents the path of directories and files. It provides the methods for renaming, deleting, and obtaining the properties of a file or directory. The File class is the wrapper class for the file name and its directory path.

Java File Class

The File class is Java’s representation of the file or directory pathname. Because file and directory names have different formats on different platforms, a simple string is not adequate to name them. A File class contains several methods for working with the pathname, deleting and renaming files, creating new directories, listing the contents of an index, and determining several common attributes of files and directories.

  1. It is an abstract representation of file and directory pathnames.
  2. The pathname, whether abstract or in the string form can be either absolute or relative. The parent of the abstract pathname may be obtained by invoking a getParent() method of this class.
  3. First of all, we should create a File class object by passing a filename or directory name to it. The file system may implement restrictions to certain operations on the actual file-system object, such as the reading, writing, and executing. These restrictions are collectively known as access permissions.
  4. Instances of a File class are immutable; that is, once created, the abstract pathname represented by the File object will never change.

The pathname can be absolute or relative.

#java #java.io #java.io file class

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Java File Class Tutorial | Java.io File Class in Java Example
Macey  Legros

Macey Legros

1600676280

Java File Class Tutorial | Java.io File Class in Java Example

Java File class represents the path of directories and files. It provides the methods for renaming, deleting, and obtaining the properties of a file or directory. The File class is the wrapper class for the file name and its directory path.

Java File Class

The File class is Java’s representation of the file or directory pathname. Because file and directory names have different formats on different platforms, a simple string is not adequate to name them. A File class contains several methods for working with the pathname, deleting and renaming files, creating new directories, listing the contents of an index, and determining several common attributes of files and directories.

  1. It is an abstract representation of file and directory pathnames.
  2. The pathname, whether abstract or in the string form can be either absolute or relative. The parent of the abstract pathname may be obtained by invoking a getParent() method of this class.
  3. First of all, we should create a File class object by passing a filename or directory name to it. The file system may implement restrictions to certain operations on the actual file-system object, such as the reading, writing, and executing. These restrictions are collectively known as access permissions.
  4. Instances of a File class are immutable; that is, once created, the abstract pathname represented by the File object will never change.

The pathname can be absolute or relative.

#java #java.io #java.io file class

Tyrique  Littel

Tyrique Littel

1600135200

How to Install OpenJDK 11 on CentOS 8

What is OpenJDK?

OpenJDk or Open Java Development Kit is a free, open-source framework of the Java Platform, Standard Edition (or Java SE). It contains the virtual machine, the Java Class Library, and the Java compiler. The difference between the Oracle OpenJDK and Oracle JDK is that OpenJDK is a source code reference point for the open-source model. Simultaneously, the Oracle JDK is a continuation or advanced model of the OpenJDK, which is not open source and requires a license to use.

In this article, we will be installing OpenJDK on Centos 8.

#tutorials #alternatives #centos #centos 8 #configuration #dnf #frameworks #java #java development kit #java ee #java environment variables #java framework #java jdk #java jre #java platform #java sdk #java se #jdk #jre #open java development kit #open source #openjdk #openjdk 11 #openjdk 8 #openjdk runtime environment

Samanta  Moore

Samanta Moore

1621118940

How to Convert ODT Files to PDF in Java

Convert Office Open Document Text File (ODT) to standard PDF, DOCX, PNG, and JPG using Java.

Microsoft has maintained its position in the spotlight for formatted document creation and editing for good reason. Its extreme ease of use and lack of a learning curve has transformed the Microsoft Office Suite into a household name for most computer users in the United States as well as globally. This is propagated further through its almost ubiquitous use in education, as students are raised and taught using these applications.

The issue that arises with these programs, however, is their operation costs. For Apple and other non-Windows-based Operating Systems, the purchasing fees for Office can be steep. This, then, creates a paywall separating potential users from programs to which they are already accustomed. As an answer this problem, Microsoft created the OpenOffice application, which is a free, opensource version of the classic Office Suite. Within this application, you can perform almost all of the same functions as Office Suite, including creating text documents like one would with Microsoft Word. These text documents can be made using OpenOffice Writer, and are formatted using the .ODT file type. While this file type can be opened and saved using OpenOffice Writer and Word, in order to convert the file to a different format such as PDF you will need to run it through a conversion process.

The following APIs will allow you to convert your ODT documents to PDF, DOCX, PNG, and JPG for use in whatever way you need. The goal of this tutorial is to provide a simple and efficient means for instantly converting your ODT files without needing to find or download any extraneous programming.

#java #tutorial #api #pdf #java api #pdf converter #api access keys #api tutorial #java api tutorials #java apis

Ambert Lency

Ambert Lency

1600669449

Top 10 Java Classes from Utility Package

Java.util package contains the collection’s framework, legacy collection classes, event model, date and time facilities, internationalization, and miscellaneous utility classes (a string tokenizer, a random-number generator, and a bit array). Here is the list of most commonly used top ten Java utility classes:

1. Java Arrays Class

Java.util package provides an Arrays class that contains a static factory that allows arrays to be viewed as lists. The class contains various methods for manipulating arrays like sorting and searching. The methods in this class throw a NullPointerException, if the specified array reference is null.

#java-class #java-tutorial #java #java-utility-class

Samanta  Moore

Samanta Moore

1620458875

Going Beyond Java 8: Local Variable Type Inference (var) - DZone Java

According to some surveys, such as JetBrains’s great survey, Java 8 is currently the most used version of Java, despite being a 2014 release.

What you are reading is one in a series of articles titled ‘Going beyond Java 8,’ inspired by the contents of my book, Java for Aliens. These articles will guide you step-by-step through the most important features introduced to the language, starting from version 9. The aim is to make you aware of how important it is to move forward from Java 8, explaining the enormous advantages that the latest versions of the language offer.

In this article, we will talk about the most important new feature introduced with Java 10. Officially called local variable type inference, this feature is better known as the **introduction of the word **var. Despite the complicated name, it is actually quite a simple feature to use. However, some observations need to be made before we can see the impact that the introduction of the word var has on other pre-existing characteristics.

#java #java 11 #java 10 #java 12 #var #java 14 #java 13 #java 15 #verbosity