March 2020
Intermediate to advanced
638 pages
14h 55m
English
Content preview from Java Cookbook, 4th Edition
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Chapter 18. Using Java with Other Languages
18.0 Introduction
Java has several methods of running programs written in other languages. You can invoke a compiled program or executable script using Runtime.exec(), as I’ll describe in Recipe 18.1.
There is an element of system dependency here, because you can only run external applications
under the operating system they are compiled for.
Alternatively, you can invoke one of a number of scripting languages (or dynamic languages)—running the gamut: awk, bsh, Clojure, Ruby, Perl, Python, Scala—using javax.script, as illustrated in Recipe 18.3.
Or you can drop down to C level with Java’s native code mechanism and call compiled functions written in C/C++; see Recipe 18.6.
From native code, you can call to functions written in just about any language. Not to mention that you can contact programs written in any language over a socket (see Chapter 13), with HTTP services (see Chapter 13), or with Java clients in RMI or CORBA clients in a variety of languages.
There is a wide range of other JVM languages, including these:
-
BeanShell, a general scripting language for Java.
-
Groovy is a Java-based scripting language that pioneered the use of closures in the Java language ecosystem. It also has a rapid-development web package called Grails and a build tool called Gradle (see Recipe 1.8). Gradle is also used as the build tool in modern Android development.
-
Jython, a full Java implementation of Python.
-
JRuby, a full Java implementation ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.