groovy case

It has been said before that many people choose groovy because of their low learning costs, as long as you have the basics of Java and learn quite quickly. In contrast, Scala (another JVM dynamic language) syntax is more difficult to learn (though not yet learned, but online reviews are).As a Java programmer, I'm going to get myself groovy.From JDK to GDK1. As the core of Java development, JDK is the part that all Java programmers need to learn and us

Since the groovy language is an extension of the Java language, it's hard to get involved with the Java language when we're using the groovy language, so we're doing a pure groovy language project like a grails project. We might use legacy Java classes and packages in groovy code, or for performance reasons, we have to

set, groovy provides a very rich way to decorate Java's core data structures, such as each{}, find{}, findall{}, every{}, collect{}, inject{}. These methods add some fun to the programming language and help us to design complex algorithms more easily. With adorners, a number of new methods have been applied to various types of Java, thanks to the dynamic nature of the language. You can find more use in strings, files, streams, collections, or other m

Introduction: Groovy's concise syntax frees developers from the typical Java™ architecture that requires code compilation but does not help express what the program really wants to achieve. In this revival of the Groovy series, groovy developer and special columnist J. Scott Hickey takes you through a series of comparisons between regular Java code and Groovy Cod

Let's look at an example of a Java regular expression.Import Java.util.regex.matcher;import Java.util.regex.pattern;public class Testmatch {public static void main ( String[] (args) { pattern pattern = pattern.compile ("g.*"); Matcher Matcher = Pattern.matcher ("Groovy"); System.out.println (Matcher.matches ());} }In fact, this code means that groovy is not a match for regular

groovy and operators are convenient methods of object methods ): "=" Or "equals" indicates whether the object is equal (with equal values), rather than pointing to the same object. The purpose of implementing equals is to ensure that this object can be compared with a null object. By default, the equals operation does not throw nullpointerexception. The Times method is only used for repeated operations. The upto method increments by a number, down

Groovy classes are compiled into bytecode of Java, that is, there is a one-to-one ing between groovy classes and Java classes. Every groovy class can be stored in JavaCodeBecause the groovy class is also a Java class. Usage of groovy list: Def list = [1, 2, 'Hello', n

This article is used to describe some of the groovy-style code in the handling of strings, and the groovy-style code here is mostly different from the coding style of the Java language. First, we're going to define a string object to use as our example: def str = "hello" Now, what we're going to say is the style of the substring. In the Java language, to remove a substring labeled 1 and 2, you must use

There are four ways to annotate groovy, and here's a more detailed look: 1.1 Single-line comment In groovy, single-line comments start with//and can start anywhere in a row, with the following characters being the annotations section. For example: A standalone single line commentprintln "Hello World"//A comment till the end of ofthe line 1.2 Multi-line comments A multiline comment starts with/* and ends w