The throw keyword in Java is used to explicitly throw an exception from a method or any block of code. The caller must catch the exceptions. If you do not handle the exception in the try-catch block, compiling will fail. But almost every other method in the java library or even user-defined may throw an exception or two.
First of all, we need to know about what is an Exception. An exception is a kind of error at the runtime. There are a lot of exceptions in Java-like ArithmeticException, NullPointerException, ArrayIndexOutOfBound exception, etc.
Suppose we are dividing a number by zero, it will not return any compilation error, but it will return runtime error, and it’s under ArithmeticException. Again, if we add a further element in Array beyond its capacity, then it returns the ArrayIndexOutOfBound exception.
We can define our own sets of rules or conditions and throw an exception explicitly using the throw keyword. We can set a condition like dividing by 5 will return ArithmeticException, and we can throw it using the throw keyword. We can also use throw keyword in Custom Exception.
#java #arithmeticexception #nullpointerexception #arrayindexoutofbound
The throws keyword in Java allows developers to check their code for invalid entry and prepare further steps if an exception occurs.
Learn about the throws keyword in Java with examples. In simple words, the throws keyword is used to declare an exception. It gives an indication to the developer about the exception that may occur. It is better for the developer to provide the exception handling code so that the normal flow of the program is maintained. There are two ways to handle the code:
What will happen if you do not handle the code? You will get a compilation error if the exception is a checked exception.
#java #exception handling #keyword #exception handling in java #example code #exception handling tutorial in java #throws
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
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
In this video, we use the this keyword in Java to access an object’s instance variables, invoke an object’s instance methods, and return the current object. Thank you for watching and happy coding!
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#keyword #java #using the this keyword in java #what is the this keyword
In Java, the program that is coded by the programmer can be used in a very unexpected way by the user, due to this, the program may fail in different sort of ways during execution. The main objective of a programmer should be to write a code that does not fail unexpectedly. That unexpected stopping of the program while execution is known as an exception, it disrupts the normal execution flow of a program.
An exception is an event that interrupts the normal flow of execution. It is a disruption during the execution of the Java program. The Exception Handling in Java is one of the powerful mechanisms to handle runtime errors so that the normal flow of the application can be maintained. Let’s see the difference between Error v/s Exception.
#java #exception #java exception handling