Java Community | Help. Code. Learn.•9mo ago

Using JShell class in JDK

so theres this class JShell that can be used same as the cli app, how can i instantiate and use it correctly? any examples?

8 Replies

JavaBot•9mo ago

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dan1st•9mo ago

https://docs.oracle.com/en/java/javase/21/docs/api/jdk.jshell/jdk/jshell/JShell.html#class-description

JShell (Java SE 21 & JDK 21)

declaration: module: jdk.jshell, package: jdk.jshell, class: JShell

dan1st•9mo ago

What exactly do you want to do?

JShell shell = Jshell.create();
List<SnippetEval> result = shell.eval("1+1");
System.out.println(result.getFirst().value());

JShell shell = Jshell.create();
List<SnippetEval> result = shell.eval("1+1");
System.out.println(result.getFirst().value());

KoblížkáčOP•9mo ago

hmm i see, do you know if it would be possible to add a URL/InputStream as classpath?

dan1st•9mo ago

how exactly? what does it point to?

KoblížkáčOP•9mo ago

well, lets say i execute it like this but its missing dependencies i have in the app which is executing it, so i want to add them to the jshell cp but they are loaded dynamically with custom classloader so they cant be added as class path

dan1st•9mo ago

https://docs.oracle.com/en/java/javase/21/docs/api/jdk.jshell/jdk/jshell/JShell.Builder.html#fileManager(java.util.function.Function) maybe

JShell.Builder (Java SE 21 & JDK 21)

declaration: module: jdk.jshell, package: jdk.jshell, class: JShell, class: Builder

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Using JShell class in JDK