Macey  Legros

Macey Legros

1600702260

Assertion in Java Example | Java Assertion Tutorial

Java assertion is an inbuilt statement that ensures the correctness of any assumptions which have been done in the program. When an assertion is executed, it is assumed to be true. If the assertion is false, the JVM will throw an Assertion error. Assertions in Java can be done with the help of the assert keyword.

Suppose there is a condition that you, as a programmer or a developer, while testing your code, want to make sure exists, such as making sure that a particular method shall  return only negative values; Java has a (relatively) new feature made available just for that.

The feature is called assertion, and wherein one can assert the existence of a particular condition. It is done with the help of the keyword assert. Assertions are generally used for testing and scarcely used in the release code. Release code is usually run with assertions disabled.

#Why to use Assertions

  1. We can make sure that an unreachable looking code is unreachable.
  2. We can make sure that assumptions written in the comments are right.
         if ((x & 1) == 1)  
         {  }
         else // x must be even 
         { assert (x % 2 == 0); }
  1. We can make sure the default switch case is not reached.
  2. We can check the object’s state.
  3. At the beginning of the method
  4. After the method invocation.

#assertion #java #assert

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Buddha Community

Assertion in Java Example | Java Assertion Tutorial
Samanta  Moore

Samanta Moore

1623861240

What is Assertion in Java? How to use Assertion in Java

Table of Contents

What is Assertion in Java?

The assertion in Java is used to ensure the correctness of any program’s assumptions as the assertion is assumed to be true when it is executed. The Java Virtual Machine throws an error named AssertionError if the assertion is false. The assertion in Java has found its application mainly for testing purposes. Boolean expressions are used along with assertion statements. An assertion is a statement, and the ‘asset’ keyword is used to carry out an assertion in Java.

#full stack development #assertion in java #assertion in java #assertion in java #what is assertion in java #how to use assertion in java

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

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

Macey  Legros

Macey Legros

1600702260

Assertion in Java Example | Java Assertion Tutorial

Java assertion is an inbuilt statement that ensures the correctness of any assumptions which have been done in the program. When an assertion is executed, it is assumed to be true. If the assertion is false, the JVM will throw an Assertion error. Assertions in Java can be done with the help of the assert keyword.

Suppose there is a condition that you, as a programmer or a developer, while testing your code, want to make sure exists, such as making sure that a particular method shall  return only negative values; Java has a (relatively) new feature made available just for that.

The feature is called assertion, and wherein one can assert the existence of a particular condition. It is done with the help of the keyword assert. Assertions are generally used for testing and scarcely used in the release code. Release code is usually run with assertions disabled.

#Why to use Assertions

  1. We can make sure that an unreachable looking code is unreachable.
  2. We can make sure that assumptions written in the comments are right.
         if ((x & 1) == 1)  
         {  }
         else // x must be even 
         { assert (x % 2 == 0); }
  1. We can make sure the default switch case is not reached.
  2. We can check the object’s state.
  3. At the beginning of the method
  4. After the method invocation.

#assertion #java #assert

Samanta  Moore

Samanta Moore

1621096440

Functions for Strings in Java

In this tutorial, you will learn how to make better use of built-in functions for Strings in Java to program more quickly, effectively, and aesthetically.

What Is a String?

Firstly, of course, we have to initialize our string. What is a string used for?

  • You want to look at your string as a line, not as a mass of symbols.
  • If you have a long text, you want to work with the words, not the letters.
  • If you have lots of information, you need functions that solve questions as quickly as possible.

#java #tutorial #java strings #java tutorial for beginners #java string #string tutorial