The main known usage of Ant is the build of Java applications.
Ant supplies a number of built-in tasks allowing to compile, assemble, test and run Java applications. More generally, Ant can be used to pilot any type of process which can be described in terms of targets and tasks.
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Ant is written in Java. Users of Ant can develop their own "antlibs" containing Ant tasks and types, and are offered a large number of ready-made commercial or open-source "antlibs".
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Ant is extremely flexible and does not impose coding conventions or directory layouts to the Java projects which adopt it as a build tool. Software development projects looking for a solution combining build tool and dependency management can use Ant in combination with Apache Ivy. Apache Ant 1. The Apache Ant team currently maintains two lines of development. The 1. Both lines are based off of Ant 1. We recommend using 1. Ant 1. This release includes a major regression fix, which prevented the previous 1. Among the enhancements, the junitlauncher task now allows including or excluding JUnit 5 "tags" during test execution.
Both releases fix a regression in the get task and a bug inside the path traversal protection of the unarchiving tasks that was introduced with 1. Apache AntUnit 1. In Eclipse, find the Java Compiler configuration and check Enable preview features. Putting strings that span several lines into code has been a pain in Java since its inception. Now, something years later, we finally get easy-to-use multiline strings, called text blocks :. Text blocks start with three quotation marks and a newline the opening delimiter; the newline is not part of the result and end with three quotation marks either in the last line of content or on its own line if the latter, the string ends with a newline.
They are accepted in the exact same places where string literals " like this one " are. In fact, after the compiler processed them, they are absolutely indistinguishable from strings created by literals. That means jsonLiteral.
Other leading whitespace is considered essential and left in place. In Java 13, text blocks are a preview feature.
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Switch expressions were introduced in Java 12 and 13 refines them. In 12 you would define return values with break :.
In 13, you need to use yield :. I slightly prefer the new variant. While break was easy to adopt for developers already familiar with Java, it was pretty odd.
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I mean, what is break true trying to tell me? The new conditional keyword yield is clearer, and in the future it may show up in other places where values are returned — in fact, Brian Goetz said it would have been used for lambdas if they had thought of the necessity back then. Due to this change, switch expressions are still in preview.
This is usually the place where I turn to new and updated APIs and tell you about all the small tidbits that will make your life easier.
String got three new methods:. Project Loom will introduce fibers light-weight threads managed by the JVM and a part of that is to have all code that blocks take the same paths because those paths are then changed to no longer block threads. A critical part of the JDK where threads are blocked are the java. Socket und java.