*            {@code null}.
     * @param problems The container used to collect problems that were encountered, must not be {@code null}.
     * @return The profiles that have been activated, never {@code null}.
     */
    List<Profile> getActiveProfiles(
            Collection<Profile> profiles, ProfileActivationContext context, ModelProblemCollector problems);

/// tip

通常你只需要在建立虛擬環境時執行此操作**一次**。

///

## 退出虛擬環境 { #deactivate-the-virtual-environment }

當你完成工作後，你可以**退出**虛擬環境。

<div class="termy">

```console
$ deactivate
```

</div>

這樣，當你執行 `python` 時它不會嘗試從已安裝套件的虛擬環境中執行。

## 開始工作 { #ready-to-work }

現在你已經準備好開始你的工作了。



/// tip

/// tip | 提示

通常你只需要在创建虚拟环境时执行此操作**一次**。

///

## 退出虚拟环境 { #deactivate-the-virtual-environment }

当你完成工作后，你可以**退出**虚拟环境。

<div class="termy">

```console
$ deactivate
```

</div>

这样，当你运行 `python` 时，它不会尝试从那个虚拟环境及其已安装的软件包中运行。

## 开始工作 { #ready-to-work }

现在你已经准备好开始你的工作了。

        request.setPomFile(getPom("simple"));

        ModelBuildingResult result = builder.build(request);
        assertNotNull(result);
        assertNotNull(result.getEffectiveModel());
        assertEquals("activated", result.getEffectiveModel().getProperties().get("profile.file"));
        Xpp3Dom conf = (Xpp3Dom)
                result.getEffectiveModel().getBuild().getPlugins().get(0).getConfiguration();
        assertNotNull(conf);

import org.apache.maven.model.Profile;
import org.apache.maven.model.building.ModelProblemCollector;
import org.apache.maven.model.profile.ProfileActivationContext;

/**
 * Determines whether a profile should be activated.
 *
 * @deprecated use {@code org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")
public interface ProfileActivator {

    /**

{
   final Logger logger = LoggerFactory.getLogger( MyClass.class );
}
+-----+

* Logger Name

 Logger name is basically the classical fully qualified class name: it's not visible by default, but can be activated (see {{{/maven-logging.html}user documentation}}).

 Notice that before Maven 3.1.0, with logger created by Maven, some code used to pass logger from class to class because it could not create a new logger:

/// tip | 豆知識

この設定は通常、仮想環境を作成した際に**一度だけ**行います。

///

## 仮想環境の無効化 { #deactivate-the-virtual-environment }

プロジェクトの作業が終了したら、その仮想環境を**無効化**できます。

<div class="termy">

```console
$ deactivate
```

</div>

これにより、 `python` コマンドを実行しても、そのプロジェクト用（のパッケージがインストールされた）仮想環境から `python` プログラムを呼び出そうとはしなくなります。

## 作業準備完了 { #ready-to-work }

            isAccessible = true
          }.get(this) as? SecretKey

    val randomRegex = "\"random\"\\s+:\\s+\"([^\"]+)\"".toRegex()

    fun register() {
      // Enable JUL logging for SSL events, must be activated early or via -D option.
      System.setProperty("javax.net.debug", "")
      logger =
        Logger
          .getLogger("javax.net.ssl")
          .apply {
            level = Level.FINEST

             * global profile manager which is required to build a POM like a CLI invocation does. Failure to consider
             * the activated profiles can cause repo declarations to be lost which in turn will result in artifact
             * resolution failures, in particular when using the enhanced local repo which guards access to local files

            pom is activated using the command line -P option or by one of that profile's
            activators.</description>
        </field>
        <field>
          <name>jdk</name>
          <version>4.0.0+</version>
          <type>String</type>
          <description>
            Specifies that this profile will be activated when a matching JDK is detected.