What if you can't use readLine properly in Gradle/IDEA

This article mainly explains "What to do if you can't use readLine normally in Gradle/IDEA". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let Xiaobian take you to learn "What to do if readLine cannot be used normally in Gradle/IDEA"!

problem

In console programs built by Gradle, the standard input readLine always returns null

reason

Gradle's standard inputs are not bound to system standard inputs by default and need to be set manually

solution

Add to build.gradle.kts

tasks.named("run") { standardInput = System.` in`}

If you need cleaner output, you can use

gradle console:run -q --console=plain

Solution (Groovy)

Add to build.gradle

run { standardInput = System.in}

Supplement: Handling issues where jline does not work properly in the IDEA development environment

Phenomenon: When developing an application in IDEA and using jline to capture console input, it cannot run normally, mainly reflected in the following code that cannot be executed after entering carriage return:

ConsoleReader reader = new ConsoleReader();

reader.readLine("> ");

Solutions:

Before using jline, execute the following code:

jline.TerminalFactory.registerFlavor(TerminalFactory.Flavor.WINDOWS, jline.UnsupportedTerminal.class);

You can also add parameters to the program startup command line

-Djline.terminal=jline.UnsupportedTerminal

At this point, I believe that everyone has a deeper understanding of "how to use readLine normally in Gradle/IDEA", so let's actually operate it! Here is the website, more related content can enter the relevant channels for inquiry, pay attention to us, continue to learn!