Java
javaTutorial
Detailed explanation and example code sharing of Java exception handling runtime exceptions
Detailed explanation and example code sharing of Java exception handling runtime exceptions
This article mainly introduces JavaException handlingRuntime exception (RuntimeException) detailed explanation and examples, friends in need can refer to it Next http://time.qq.com/?pgv_ref=aiotime
Java exception handling runtime exception (RuntimeException) detailed explanation and examples
RuntimeException
Subclass of RunntimeException:
ClassCastException
In polymorphism, you can use Instanceof to judge and avoid it
ArithmeticException
Perform if judgment, if the divisor is 0, perform return
NullPointerException
Perform if judgment to see if it is null
ArrayIndexOutOfBoundsException
Use the array length attribute to avoid crossing the boundary
These exceptions can Things that can be avoided through good programming habits of programmers
1: There is no need to handle runtime exceptions, just find the code that caused the problem and avoid it.
2: Just like a person getting angry and having a toothache, find the cause and solve it by yourself
3: This kind of exception the compiler will not check whether the programmer handles the exception
4: If it is runtime Exception, then there is no need to declare it on the function .
Case
1: Division operation function (p(int x, int y))
2: if determines if the divisor is 0, throw new ArithmeticException();
3: Function declaration throws ArithmeticException
4: main method calls p, no processing
5: Compilation passes, running normally
6: If the divisor is 0, an exception will be reported and the program will stop.
7: If it is a runtime exception, there is no need to declare it on the function.
1: The wait() method in Object class internally throws 2 exceptions IllegalMonitorStateException InterruptedException
1: Only one (throws) IllegalMonitorStateException is declared The operation is abnormal and there is no declaration.
class Demo{
public static void main(String[] args){
p(2, 1);
}
public static void p(int x, int y) {
if (y == 0) {
throw new ArithmeticException();
}
System.out.println(x / y);
}
}The above is the detailed content of Detailed explanation and example code sharing of Java exception handling runtime exceptions. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
Java Spring Interview Questions
Aug 30, 2024 pm 04:29 PM
In this article, we have kept the most asked Java Spring Interview Questions with their detailed answers. So that you can crack the interview.
How do you handle exceptions effectively in PHP (try, catch, finally, throw)?
Apr 05, 2025 am 12:03 AM
In PHP, exception handling is achieved through the try, catch, finally, and throw keywords. 1) The try block surrounds the code that may throw exceptions; 2) The catch block handles exceptions; 3) Finally block ensures that the code is always executed; 4) throw is used to manually throw exceptions. These mechanisms help improve the robustness and maintainability of your code.
Break or return from Java 8 stream forEach?
Feb 07, 2025 pm 12:09 PM
Java 8 introduces the Stream API, providing a powerful and expressive way to process data collections. However, a common question when using Stream is: How to break or return from a forEach operation? Traditional loops allow for early interruption or return, but Stream's forEach method does not directly support this method. This article will explain the reasons and explore alternative methods for implementing premature termination in Stream processing systems. Further reading: Java Stream API improvements Understand Stream forEach The forEach method is a terminal operation that performs one operation on each element in the Stream. Its design intention is
TimeStamp to Date in Java
Aug 30, 2024 pm 04:28 PM
Guide to TimeStamp to Date in Java. Here we also discuss the introduction and how to convert timestamp to date in java along with examples.
PHP: A Key Language for Web Development
Apr 13, 2025 am 12:08 AM
PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7
Java Program to Find the Volume of Capsule
Feb 07, 2025 am 11:37 AM
Capsules are three-dimensional geometric figures, composed of a cylinder and a hemisphere at both ends. The volume of the capsule can be calculated by adding the volume of the cylinder and the volume of the hemisphere at both ends. This tutorial will discuss how to calculate the volume of a given capsule in Java using different methods. Capsule volume formula The formula for capsule volume is as follows: Capsule volume = Cylindrical volume Volume Two hemisphere volume in, r: The radius of the hemisphere. h: The height of the cylinder (excluding the hemisphere). Example 1 enter Radius = 5 units Height = 10 units Output Volume = 1570.8 cubic units explain Calculate volume using formula: Volume = π × r2 × h (4
PHP vs. Python: Understanding the Differences
Apr 11, 2025 am 12:15 AM
PHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.
Create the Future: Java Programming for Absolute Beginners
Oct 13, 2024 pm 01:32 PM
Java is a popular programming language that can be learned by both beginners and experienced developers. This tutorial starts with basic concepts and progresses through advanced topics. After installing the Java Development Kit, you can practice programming by creating a simple "Hello, World!" program. After you understand the code, use the command prompt to compile and run the program, and "Hello, World!" will be output on the console. Learning Java starts your programming journey, and as your mastery deepens, you can create more complex applications.
