Garve Hays gkhays

Read a File from Disk into a String

Various methods for reading the contents of a file from disk into a string.

Using NIO

One-liner bonus! 😄

String contents = new String(Files.readAllBytes(Paths.get(fileName)));

Markdown Quick Start

This is my attempt to capture some of the things I (relatively) frequently do in Markdown. It is by no means definitive, but I always seem to forget these ones.

Links

Inline-style links use parentheses immediately after the link text. For example:

This is an [example link](http://example.com/).

How Many Assertions Per Unit Test

There is a really good exchange on Programmers Stack Exchange on the number of assertions to have in a single unit test: Is it OK to have multiple asserts in a single unit test?

Proper unit tests should fail for exactly one reason, that's why you should be using one assert per unit test.

More Assertions for JUnit

The "match at least one" example below relies on Hamcrest matchers. There is an alternative to Hamcrest, see AssertJ documentation.

Apache Commons and Log4J Logging

This article illustrates a quick start to using Log4J and commons logging. Obtaining a log factory and logging to various levels is fairly straight-forward. What can be tricky is getting the properties files correct. The code snippet below depends on:

commons-logging-1.1.jar
log4j-1.2.16.jar

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

	#!/bin/bash
	# http://commons.apache.org/proper/commons-exec/commandline.html
	# http://tldp.org/LDP/Bash-Beginners-Guide/html/sect_09_07.html

	while [ $# -gt 0 ]
	do
	echo "$1"
	shift
	done

	import java.io.*;

	/**
	* @see <a href="http://alvinalexander.com/java/edu/pj/pj010016">Running system commands in Java applications</a>
	* /
	public class JavaRunCommand {

	public static void main(String args[]) {

	String s = null;

	#! /bin/sh
	# ==================================================================
	# ______ __ _____
	# /_ __/___ ____ ___ _________ _/ /_ /__ /
	# / / / __ \/ __ `__ \/ ___/ __ `/ __/ / /
	# / / / /_/ / / / / / / /__/ /_/ / /_ / /
	#/_/ \____/_/ /_/ /_/\___/\__,_/\__/ /_/

	# Multi-instance Apache Tomcat installation with a focus
	# on best-practices as defined by Apache, SpringSource, and MuleSoft

	package org.gkh;

	import java.io.BufferedReader;
	import java.io.Console;
	import java.io.IOException;
	import java.io.InputStreamReader;

	public class ConsoleUtil {

	/**

	/**
	* Represents the Microsoft Azure AD service. The methods to which you should
	* pay attention are {@link #executeJSONChunkRequest(JSONObject, String, int)}
	* and {@link #setConfigData(String, int, String, JSONObject)}. These are
	* respectively where data requests from <code>DaaS</code> come and where the
	* service is configured.
	* <p>
	* This is the class referenced by collector templates. E.g.
	*
	* <pre>

	# Download and unarchive Java
	RUN mkdir /opt && curl -jksSLH "Cookie: oraclelicense=accept-securebackup-cookie"\
	http://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-x64.tar.gz \
	\| tar -xzf - -C /opt &&\
	ln -s /opt/jdk1.7.0_79 /opt/jdk &&\
	rm -rf /opt/jdk/*src.zip \
	/opt/jdk/lib/missioncontrol \
	/opt/jdk/lib/visualvm \
	/opt/jdk/lib/javafx \
	/opt/jdk/jre/lib/plugin.jar \