mmkathurima

Working with JShell

What is JShell?

JShell is a tool that lets you execute Java code interactively. It is part of the JDK, starting with Java SE 9.

Commands

JShell commands control the environment and display information within a session.

What is a kernel?

The kernel lets you run code in a particular programming language using one of the Jupyter tools, such as the Notebook, Jupyterlab or nteract. Installing additional kernels will let you run code in more languages using your existing jupyter installation.

Technically, the kernel is an application which speaks the Jupyter Messaging Protocol, to receive code input from the frontend and respond with the results.

Which kernels do I have installed?

In the Notebook or JupyterLab, the list of available kernels will be shown when trying to create a new notebook.

The PATH is an important concept when working on the command line. It's a list of directories that tell your operating system where to look for programs, so that you can just write script instead of /home/me/bin/script or C:\Users\Me\bin\script. But different operating systems have different ways to add a new directory to it:

Windows

The first step depends which version of Windows you're using:

If you're using Windows 8 or 10, press the Windows key, then search for and

	<plugin>
	<groupId>org.apache.maven.plugins</groupId>
	<artifactId>maven-shade-plugin</artifactId>
	<executions>
	<execution>
	<goals>
	<goal>shade</goal>
	</goals>
	<configuration>
	<shadedArtifactAttached>true</shadedArtifactAttached>

	import javafx.scene.paint.Color;

	import java.io.BufferedReader;
	import java.io.IOException;
	import java.io.InputStream;
	import java.io.InputStreamReader;
	import java.io.StringWriter;
	import java.util.Arrays;
	import java.util.List;
	import java.util.Map;

	@supports (-webkit-backdrop-filter: none) or (backdrop-filter: none) {
	.blurred-container {
	-webkit-backdrop-filter: blur(10px);
	backdrop-filter: blur(10px);
	}
	}

	/* slightly transparent fallback for Firefox (not supporting backdrop-filter) */
	@supports not ((-webkit-backdrop-filter: none) or (backdrop-filter: none)) {
	.blurred-container {

	# ~/.zshrc file for zsh non-login shells.
	# see /usr/share/doc/zsh/examples/zshrc for examples

	setopt autocd # change directory just by typing its name
	#setopt correct # auto correct mistakes
	setopt interactivecomments # allow comments in interactive mode
	setopt ksharrays # arrays start at 0
	setopt magicequalsubst # enable filename expansion for arguments of the form ‘anything=expression’
	setopt nonomatch # hide error message if there is no match for the pattern
	setopt notify # report the status of background jobs immediately

	#!/bin/bash

	# Run these commands after creating your service file to get it installed and running.

	# Once the service file is finished, copy it to the correct directory.
	# In Ubuntu based systems, this is usually /etc/systemd/system.
	sudo cp postgres.service /etc/systemd/service

	# Now try starting the service:
	sudo systemctl start postgres.service


	@Configuration
	public class InterceptorConfig implements WebMvcConfigurer {

	@Bean
	public MappingJackson2XmlHttpMessageConverter mappingJackson2XmlHttpMessageConverter(
	Jackson2ObjectMapperBuilder builder) {
	ObjectMapper mapper = builder.createXmlMapper(true).build();
	((XmlMapper) mapper).enable(ToXmlGenerator.Feature.WRITE_XML_DECLARATION);
	return new MappingJackson2XmlHttpMessageConverter(mapper);

	package br.com.rponte.util.xml;

	import java.io.File;
	import java.io.FileInputStream;
	import java.io.InputStreamReader;
	import java.io.Reader;
	import java.io.StringReader;
	import java.io.StringWriter;

	import javax.xml.bind.JAXBContext;