Recipe catalog
Java
Modernize
java.util APIs
Use getFirst() instead of stream().findFirst().orElseThrow()

Use `getFirst()` instead of `stream().findFirst().orElseThrow()`

org.openrewrite.java.migrate.util.StreamFindFirst

For SequencedCollections, use collection.getFirst() instead of collection.stream().findFirst().orElseThrow() .

Recipe source

GitHub , Issue Tracker , Maven Central

groupId: org.openrewrite.recipe

artifactId: rewrite-migrate-java

version: 2.29.0

Usage

This recipe has no required configuration options. It can be activated by adding a dependency on org.openrewrite.recipe:rewrite-migrate-java:2.29.0 in your build file or by running a shell command (in which case no build changes are needed):

Gradle
Gradle init script
Maven POM
Maven Command Line
Moderne CLI

Add the following to your build.gradle file:

               build.gradle
              
plugins {
    id("org.openrewrite.rewrite") version("6.27.1")
}

rewrite {
    activeRecipe("org.openrewrite.java.migrate.util.StreamFindFirst")
    setExportDatatables(true)
}

repositories {
    mavenCentral()
}

dependencies {
    rewrite("org.openrewrite.recipe:rewrite-migrate-java:2.29.0")
}

Run gradle rewriteRun to run the recipe.
Create a file named init.gradle in the root of your project.

               init.gradle
              
initscript {
    repositories {
        maven { url "https://plugins.gradle.org/m2" }
    }
    dependencies { classpath("org.openrewrite:plugin:6.27.1") }
}
rootProject {
    plugins.apply(org.openrewrite.gradle.RewritePlugin)
    dependencies {
        rewrite("org.openrewrite.recipe:rewrite-migrate-java:2.29.0")
    }
    rewrite {
        activeRecipe("org.openrewrite.java.migrate.util.StreamFindFirst")
        setExportDatatables(true)
    }
    afterEvaluate {
        if (repositories.isEmpty()) {
            repositories {
                mavenCentral()
            }
        }
    }
}

                
               

Run the recipe.

shell

gradle --init-script init.gradle rewriteRun

Add the following to your pom.xml file:

               pom.xml
              
<project>
  <build>
    <plugins>
      <plugin>
        <groupId>org.openrewrite.maven</groupId>
        <artifactId>rewrite-maven-plugin</artifactId>
        <version>5.45.0</version>
        <configuration>
          <exportDatatables>true</exportDatatables>
          <activeRecipes>
            <recipe>org.openrewrite.java.migrate.util.StreamFindFirst</recipe>
          </activeRecipes>
        </configuration>
        <dependencies>
          <dependency>
            <groupId>org.openrewrite.recipe</groupId>
            <artifactId>rewrite-migrate-java</artifactId>
            <version>2.29.0</version>
          </dependency>
        </dependencies>
      </plugin>
    </plugins>
  </build>
</project>

                
               




    

Run mvn rewrite:run to run the recipe.

You will need to have Maven installed on your machine before you can run the following command.

               shell
              
mvn -U org.openrewrite.maven:rewrite-maven-plugin:run -Drewrite.recipeArtifactCoordinates=org.openrewrite.recipe:rewrite-migrate-java:RELEASE -Drewrite.activeRecipes=org.openrewrite.java.migrate.util.StreamFindFirst -Drewrite.exportDatatables=true

You will need to have configured the Moderne CLI on your machine before you can run the following command.

               shell
              
mod run . --recipe StreamFindFirst

See how this recipe works across multiple open-source repositories

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Data Tables

Source files that had results

org.openrewrite.table.SourcesFileResults

Source files that were modified by the recipe run.

Column Name	Description
Source path before the run	The source path of the file before the run. `null` when a source file was created during the run.
Source path after the run	A recipe may modify the source path. This is the path after the run. `null` when a source file was deleted during the run.
Parent of the recipe that made changes	In a hierarchical recipe, the parent of the recipe that made a change. Empty if this is the root of a hierarchy or if the recipe is not hierarchical at all.
Recipe that made changes	The specific recipe that made a change.
Estimated time saving	An estimated effort that a developer to fix manually instead of using this recipe, in unit of seconds.
Cycle	The recipe cycle in which the change was made.

Source files that errored on a recipe

org.openrewrite.table.SourcesFileErrors

The details of all errors produced by a recipe run.

Column Name	Description
Source path	The file that failed to parse.
Recipe that made changes	The specific recipe that made a change.
Stack trace	The stack trace of the failure.

Recipe source ​

Usage ​

See how this recipe works across multiple open-source repositories ​

Data Tables ​

Source files that had results ​

Source files that errored on a recipe ​