ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

Programming in Java Netbeans - A Step by Step Tutorial for Beginners: Lesson 31

Updated on October 23, 2019
dwachira profile image

Danson Wachira is a certified Trainer in Computer Science, Information Technology and related studies.

Lesson 31: Types of programming errors

As a beginner programmer in Java, you’ll encounter a number of errors in programming. The good thing about most compilers is that they will underline most of the design errors within the code window to alert you about them.

Making programming errors is common but as you become more used and experienced in writing codes you shall learn how to detect, isolate and correct errors which are likely to be present in the program.

Most errors will occur because of minor omissions like forgetting to match braces, improper commenting, wrong method declaration, missing a semicolon at the end of a statement, missing quotes in strings etc. Most of these errors are design errors but in general, we have the following types of errors in programming:

Types of programming errors
Types of programming errors | Source

Types of programming errors

  • Design or Syntax errors

These are errors that occur due to violation of rules of the programming language. The good thing about Syntax errors is that most compilers can detect and isolate these errors. Java NetBeans underlines these type of errors in wavy red lines. If Syntax errors are not corrected then the program cannot run.

  • Semantic errors

Semantic errors occur when a programmer obeys the syntax rules of the programming language but use statements that are out of context. For example, a programmer may define a variable and later try to use it when it is out of scope.

  • Run-time errors

In most cases, run-time errors will not stop a program to run but it will produce erroneous result. For example, you may have wanted to generate a range of random numbers and multiply each generated number by a constant value. In such a case, if the loop is not correctly set then you many have a run-time error. Generally it is a difficult task to isolate run-time errors.

Java Programming Syntax Errors and Logical Errors

  • Logical errors

As the name suggest, logical errors usually results from poor understanding of the program specification and inaccurate translation of the program algorithm. For example, the following code will cause a logical error since variable i will never be less or equal to zero.

for(int i = 1; i<=0; i++)

  • Latent errors

One of the difficult errors to correct in programming is the latent error. This type of error may occur when certain types of operations are executed in the program but not in all cases. Take for example the following statement:

Ratio=(x+y)/(p-q);

The above statement will generate a latent error if and only if when p and q are equal such that we’ll be dividing a number by zero. These types of errors are best detected by using all possible combinations of test data.

  • System errors

System errors are usually beyond the control of a programmer because they are usually caused by a hardware failure. For example, hard disk may fail to respond when writing into a file, graphic display drivers may fail or program may be accessing a memory location which is not available.

The best way to approach error handling in any programming language is to be familiar with many types of errors and develop various tricks of detecting, isolating and correcting those errors. While some errors such as syntax errors are easy to detect and correct other types such as logical and latent errors are tricky and difficult to trace and correct.

Sometimes error handling in programming may entirely depend on the experience and wit of the programmer. In the next lesson, we shall specifically look at error handling in Java programming language.

<< Lesson 30 | Lesson 32 >>

Comments

    0 of 8192 characters used
    Post Comment
    • profile image

      Ahmed 

      7 years ago

      Thanks for this tutorial, very helpful

    working

    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, hubpages.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: https://maven.io/company/pages/privacy

    Show Details
    Necessary
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
    Features
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Marketing
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Statistics
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)
    ClickscoThis is a data management platform studying reader behavior (Privacy Policy)