How to import just compiled classes in build.gradle?

Help/Discuss
1

I have a Java compile task to create my project. In another task I want to use (import?) these classes to get some information which I need during task execution. How can I do this in Gradle?

2

The buildscript classpath is defined before the JavaCompile task runs so you’ll need to use a Classloader.

Eg:

apply plugin: 'java' 
task useMyCompiledClasses {
   dependsOn compileJava
   doLast {
      URL[] urls = sourceSets.main.runtimeClasspath.files.collect { it.toURI().toURL() } as URL[]
      def classloader = new java.net.URLClassloader(urls, null)
      Class type = classloader.loadClass('com.foo.MyClass')
      def myInstance = type.newInstance()
      myInstance.doStuff()
   }
}
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3

This is exact what I was looking for. Thanks!

However I was getting an error “unable to resolve class java.net.URLClassloader” (the letter “L” is in lower case). Correct is URLClassLoader

At the end my code look like this:

task encrypt {
dependsOn compileJava
doLast {
    URL[] urls = sourceSets.main.runtimeClasspath.files.collect { it.toURI().toURL() } as URL[]
    ClassLoader sysClassLoader = ClassLoader.getSystemClassLoader();
    def classloader = new URLClassLoader(urls, sysClassLoader)
    Class type = classloader.loadClass('br.com.mycompany.EncryptMaster')
    def myInstance = type.newInstance()
    def result = myInstance.stringEncryptor().encrypt("Testing Cryptography")
    println "Result: " + result
 }
}
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