This is a bug #122429 of eclipse

Answer from swimmingfisher on Stack Overflow
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GitHub
github.com › google › error-prone › issues › 4355
SystemConsoleNull should consider the case where `System.console() == null` · Issue #4355 · google/error-prone
March 29, 2024 - However, it may still return null, both from the specification and actual implementation. ... @SuppressWarnings("SystemConsoleNull") // https://errorprone.info/bugpattern/SystemConsoleNull private static boolean systemConsoleIsTerminal() { Console systemConsole = System.console(); if (Runtime.version().feature() < 22) { return systemConsole != null; } try { return (systemConsole != null) && (Boolean) Console.class.getMethod("isTerminal").invoke(systemConsole); } catch (ReflectiveOperationException e) { throw new LinkageError(e.getMessage(), e); } }
Author   google
Discussions

command line - Try to disable console output, console=null doesn't work - Unix & Linux Stack Exchange
as mentioned above, I want to to completely turn off the console output, but putting console= or console=null in the kernel command line doesn't change a thing. When I enque quiet to the kernel com... More on unix.stackexchange.com
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When will be Console.Readline() == null?
From Microsoft documentation: If the Ctrl+Z key combination (followed by Enter on Windows) is pressed when the method is reading input from the console, the method returns null. This enables the user to prevent further keyboard input when the ReadLine method is called in a loop. The following example illustrates this scenario. https://learn.microsoft.com/en-us/dotnet/api/system.console.readline?view=net-8.0 The documentation also says it could be null when the input has been redirected to a file. More on reddit.com
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31
15
March 13, 2024
html - Why am I getting null in the console in JavaScript? - Stack Overflow
I want the div to be output in the console but I am getting 'null' in the console. More on stackoverflow.com
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java - System.console() is null - Stack Overflow
Which system are you running on? It returns null if there is no console attached to the JVM. More on stackoverflow.com
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February 5, 2019
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GitHub
github.com › systemd › systemd › issues › 13332
Passing `console=null` in kernel command line prevents system from booting · Issue #13332 · systemd/systemd
August 16, 2019 - Steps to reproduce the problem Pass console=null in the kernel cmdline when using the latest systemd.
Author   systemd
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MDN Web Docs
developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Operators › null
null - JavaScript - MDN Web Docs
function getVowels(str) { const m = str.match(/[aeiou]/gi); if (m === null) { return 0; } return m.length; } console.log(getVowels("sky")); // Expected output: 0 · js · null · The keyword null is a literal for the null value. Unlike undefined, which is a global variable, null is not an ...
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Coderanch
coderanch.com › t › 641563 › java › System-console-returns-null
System.console() returns null (Java in General forum at Coderanch)
The problem is that System.console() returns null, and for that reason the NullPointerException is thrown at 11. Is there a way to run this in Eclipse without significant changes in the code?.
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Reddit
reddit.com › r/csharp › when will be console.readline() == null?
r/csharp on Reddit: When will be Console.Readline() == null?
March 13, 2024 -

I'm learning C# (.NET 8.0) and doing exercises on Microsoft Learn platform.

The following code won't work as intended, because if I hit enter, without any prompt the readResult will be an empty string instead of null.

Description from the exercise:

When using a Console.ReadLine() statement to obtain user input, it's common practice to use a nullable type string (designated string?) for the input variable and then evaluate the value entered by the user. The following code sample uses a nullable type string to capture user input. The iteration continues while the user-supplied value is null:

Code:

string? readResult;
Console.WriteLine("Enter a string:");
do
{
    readResult = Console.ReadLine();
} while (readResult == null);

In this case the program stops in every case, because it won't be null and won't trigger Console.ReadLine() again.

string input = Console.ReadLine(); // just hit enter withount any input
Console.WriteLine(input == null); // False
Console.WriteLine(input == "");	// True

When will it be null?

Am I right? Is it a bug or something changed in the new version of .NET?

Find elsewhere
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Stack Overflow
stackoverflow.com › questions › 54535840 › system-console-is-null
java - System.console() is null - Stack Overflow
February 5, 2019 - Which system are you running on? It returns null if there is no console attached to the JVM.
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Stack Overflow
stackoverflow.com › questions › 68525501 › console-log-data-return-as-null
Console log data return as null - javascript
0 console log return null · 1 Chrome console returning undefined when output is expected · 0 why my fetch body always return null in Google Chrome Extension · 6 fetching from a URL shows an error in console even after catching it? 2 fetch() works in Extension but fails in Chrome Console/Snippet ·
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Google Groups
groups.google.com › g › comp.os.linux.embedded › c › uQkxZCav3BY
redirecting console Output to /dev/null
There are several sources of console messages. 1. Kernel outputs to whatever console is registered, with printk(). 2. init and its children have output bound to /dev/console by the way of normal opening. You can redirect #2 to /dev/null, but not the #1. For that, you better hack drivers/char/serial.c.
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JetBrains
youtrack.jetbrains.com › issue › IDEABKL-5949 › System.console-returns-null
System.console() returns null : IDEABKL-5949
{{ (>_<) }} This version of your browser is not supported. Try upgrading to the latest stable version. Something went seriously wrong
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Microsoft Learn
learn.microsoft.com › en-us › dotnet › csharp › language-reference › keywords › null
null keyword - C# reference | Microsoft Learn
Console.WriteLine($"Empty string {(s == t ? "equals" : "does not equal")} null string"); // Returns true. Console.WriteLine($"null == null is {null == null}"); // A value type cannot be null // int i = null; // Compiler error! // Use a nullable value type instead: int?
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freeCodeCamp
forum.freecodecamp.org › javascript
Why does it log out "null" on the console on JS? - JavaScript
October 25, 2022 - Hello. This is my code: function saveInput() { console.log("Button clicked from onclick attribute") } let inputBtn = document.getElementById("input-btn") console.log(inputBtn) And it logs out “null”. It’s part of …
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JetBrains
youtrack.jetbrains.com › issue › SCL-22246 › System.console-is-null
System.console is null : SCL-22246
{{ (>_<) }} This version of your browser is not supported. Try upgrading to the latest stable version. Something went seriously wrong
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Built In
builtin.com › software-engineering-perspectives › javascript-null-check
How to Check for Null in JavaScript | Built In
To make sure we have exactly a null value excluding any undefined values, we can use the triple equality === operator, otherwise known as the strict equality operator: console.log("The value null") console.log(null===0) // false console.log(null===0n) // false console.log(null===null) // true console.log(null===undefined) // false console.log(null===false) // false console.log(null===NaN) // false console.log(null==="") // false