outputFile = file("$buildDir/outputFile")
            }

            abstract class MyTask extends DefaultTask {
                @InputDirectory File inputDir
                @Input String input
                @InputFile File inputFile
                @OutputDirectory File outputDir
                @OutputFile File outputFile

            validAnnotations = "@Console, @Destroys, @Inject, @Input, @InputDirectory, @InputFile, @InputFiles, @Internal, @LocalState, @Nested, @OptionValues, @OutputDirectories, @OutputDirectory, @OutputFile, @OutputFiles, @ReplacedBy or @ServiceReference"
            this
        }
    }

    static class ConflictingAnnotation extends ValidationMessageDisplayConfiguration<ConflictingAnnotation> {

import org.gradle.api.tasks.InputDirectory
import org.gradle.api.tasks.InputFile
import org.gradle.api.tasks.LocalState
import org.gradle.api.tasks.OutputDirectory
import org.gradle.api.tasks.OutputFile
import org.gradle.api.tasks.OutputFiles
import org.gradle.api.tasks.TaskAction
import org.gradle.composite.internal.BuildTreeWorkGraphController
import org.gradle.internal.file.Stat
import org.gradle.internal.operations.TestBuildOperationRunner

task("myOtherTask") {
    val outputFile = newOutputFile()
    doLast { ... }
}
----
=====
====

Now you have to explicitly register `outputFile`, like this:

====
[.multi-language-sample]
=====
.build.gradle
[source, groovy]
----
class MyTask extends DefaultTask {
    @OutputFile // property needs an annotation
    final RegularFileProperty outputFile = project.objects.fileProperty()
}

| `@link:{javadocPath}/org/gradle/api/tasks/OutputFile.html[OutputFile]`
| `File`*
| A single output file (not directory)

| `@link:{javadocPath}/org/gradle/api/tasks/OutputDirectory.html[OutputDirectory]`
| `File`*
| A single output directory (not file)

| `@link:{javadocPath}/org/gradle/api/tasks/OutputFiles.html[OutputFiles]`
| `Map<String, File>`+++**+++ or `Iterable<File>`+++*+++

    @Input
    private String text
    @OutputFile
    private File outputFile

    public String getText() {
        return text
    }

    public void setText(String text) {
        this.text = text
    }

    public File getOutputFile() {
        return outputFile
    }

    public void setOutputFile(File outputFile) {
        this.outputFile = outputFile
    }

    @TaskAction

 * are different to when the task was last run.</p>
 */
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.FIELD})
public @interface OutputFile {

                @$OutputFile.name
                File outputFile2 = new File(temporaryDir, "output2.txt")

                @$OutputFile.name
                File outputFile1 = new File(temporaryDir, "output1.txt")

                @$TaskAction.name
                void generate() {
                    outputFile1.text = "done1"
                    outputFile2.text = "done2"
                }

                }
            }

            def customTask = tasks.register("customTask", CustomTask) {
                outputFile = file('build/outputFile.bin')
            }

            tasks.register("customTask2", CustomTask) {
                mustRunAfter(customTask)
                outputFile = file('build/outputFile2.bin')
            }
        """.stripIndent()
    }

    inputFiles.add(producerOne.get().outputFile)
    inputFiles.add(producerTwo.get().outputFile)
}

// Set values for the producer tasks lazily
// Don't need to update the consumer.inputFiles property. This is automatically updated as producer.outputFile changes
producerOne.configure { outputFile = layout.buildDirectory.file('one.txt') }
producerTwo.configure { outputFile = layout.buildDirectory.file('two.txt') }