Why Does System.console() Return Null When Debugging in Eclipse?-javaTutorial-php.cn

Home

Java

javaTutorial

Why Does System.console() Return Null When Debugging in Eclipse?

Susan Sarandon

Dec 12, 2024 pm 07:55 PM

Why Does System.console() Return Null When Debugging in Eclipse?

System.console() Returns Null in Eclipse Debug Mode

When using the readLine method of BufferedReader to read input or a new password from a user, masking the password with the java.io.Console class is preferred. However, encountering a null return from System.console() while debugging in Eclipse can be frustrating.

Unfortunately, this issue is attributed to a bug (#122429) in Eclipse itself. The workaround involves disabling console logging during debugging:

Navigate to the Eclipse Preferences window (Window > Preferences on Windows/macOS, Eclipse > Preferences on Linux).
Expand the "Java" node and select the "Console" subcategory.
Clear the "Show console only for active contents" checkbox.

This modification allows System.console() to function correctly even when debugging in Eclipse.

The above is the detailed content of Why Does System.console() Return Null When Debugging in Eclipse?. For more information, please follow other related articles on the PHP Chinese website!

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Is Java Platform Independent if then how?May 09, 2025 am 12:11 AM

Java is platform-independent because of its "write once, run everywhere" design philosophy, which relies on Java virtual machines (JVMs) and bytecode. 1) Java code is compiled into bytecode, interpreted by the JVM or compiled on the fly locally. 2) Pay attention to library dependencies, performance differences and environment configuration. 3) Using standard libraries, cross-platform testing and version management is the best practice to ensure platform independence.

The Truth About Java's Platform Independence: Is It Really That Simple?May 09, 2025 am 12:10 AM

Java'splatformindependenceisnotsimple;itinvolvescomplexities.1)JVMcompatibilitymustbeensuredacrossplatforms.2)Nativelibrariesandsystemcallsneedcarefulhandling.3)Dependenciesandlibrariesrequirecross-platformcompatibility.4)Performanceoptimizationacros

Java Platform Independence: Advantages for web applicationsMay 09, 2025 am 12:08 AM

Java'splatformindependencebenefitswebapplicationsbyallowingcodetorunonanysystemwithaJVM,simplifyingdeploymentandscaling.Itenables:1)easydeploymentacrossdifferentservers,2)seamlessscalingacrosscloudplatforms,and3)consistentdevelopmenttodeploymentproce

JVM Explained: A Comprehensive Guide to the Java Virtual MachineMay 09, 2025 am 12:04 AM

TheJVMistheruntimeenvironmentforexecutingJavabytecode,crucialforJava's"writeonce,runanywhere"capability.Itmanagesmemory,executesthreads,andensuressecurity,makingitessentialforJavadeveloperstounderstandforefficientandrobustapplicationdevelop

Key Features of Java: Why It Remains a Top Programming LanguageMay 09, 2025 am 12:04 AM

Javaremainsatopchoicefordevelopersduetoitsplatformindependence,object-orienteddesign,strongtyping,automaticmemorymanagement,andcomprehensivestandardlibrary.ThesefeaturesmakeJavaversatileandpowerful,suitableforawiderangeofapplications,despitesomechall

Java Platform Independence: What does it mean for developers?May 08, 2025 am 12:27 AM

Java'splatformindependencemeansdeveloperscanwritecodeonceandrunitonanydevicewithoutrecompiling.ThisisachievedthroughtheJavaVirtualMachine(JVM),whichtranslatesbytecodeintomachine-specificinstructions,allowinguniversalcompatibilityacrossplatforms.Howev

How to set up JVM for first usage?May 08, 2025 am 12:21 AM

To set up the JVM, you need to follow the following steps: 1) Download and install the JDK, 2) Set environment variables, 3) Verify the installation, 4) Set the IDE, 5) Test the runner program. Setting up a JVM is not just about making it work, it also involves optimizing memory allocation, garbage collection, performance tuning, and error handling to ensure optimal operation.

How can I check Java platform independence for my product?May 08, 2025 am 12:12 AM

ToensureJavaplatformindependence,followthesesteps:1)CompileandrunyourapplicationonmultipleplatformsusingdifferentOSandJVMversions.2)UtilizeCI/CDpipelineslikeJenkinsorGitHubActionsforautomatedcross-platformtesting.3)Usecross-platformtestingframeworkss

See all articles