本文整理了Java中org.openide.util.Lookup.lookup()方法的一些代码示例，展示了Lookup.lookup()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Lookup.lookup()方法的具体详情如下：
包路径：org.openide.util.Lookup
类名称：Lookup
方法名：lookup

Lookup.lookup介绍

[英]Look up an object matching a given interface. This is the simplest method to use. If more than one object matches, the first will be returned. The template class may be a class or interface; the instance is guaranteed to be assignable to it.
[中]查找与给定接口匹配的对象。这是最简单的方法。如果有多个对象匹配，将返回第一个对象。模板类可以是类或接口；实例保证可分配给它。

代码示例

代码示例来源：origin: org.netbeans.api/org-openide-util

/** Lazy create default NB classloader for use during deserialization. */
private static ClassLoader getNBClassLoader() {
  ClassLoader c = Lookup.getDefault().lookup(ClassLoader.class);
  return (c != null) ? c : ClassLoader.getSystemClassLoader();
}

代码示例来源：origin: org.netbeans.api/org-openide-util

private static Provider getPreferencesProvider() {
  Provider retval = Lookup.getDefault().lookup(Provider.class);
  if (retval == null) {
     retval = new Provider() {
       public Preferences preferencesForModule(Class cls) {
          return Preferences.userNodeForPackage(cls);
       }
       public Preferences preferencesRoot() {
          return Preferences.userRoot();
       }                         
     };
     // Avoided warning in case it is set 
     //(e.g. from NbTestCase - org.netbeans.junit.internal.MemoryPreferencesFactory).
     String prefsFactory = System.getProperty("java.util.prefs.PreferencesFactory");//NOI18N
     if (!"org.netbeans.junit.internal.MemoryPreferencesFactory".equals(prefsFactory)) {//NOI18N
       Logger logger = Logger.getLogger(NbPreferences.class.getName());
       logger.log(prefsFactory == null ? Level.WARNING : Level.FINE,
           "NetBeans implementation of Preferences not found");//NOI18N
     } 
  }
  return retval;
}

代码示例来源：origin: org.netbeans.api/org-openide-util-lookup

return defaultLookup;
LOG.log(Level.FINER, "About to initialize Lookup@{0}.getDefault() by {1}", 
  new Object[] { Lookup.class.getClassLoader(), Thread.currentThread() }
);
LOG.log(Level.FINER, "Specified by property? Value: {0}", className);
LOG.log(Level.FINER, "Searching in classloader {0}", l);
try {
  if (className != null) {
defaultLookup = misl.lookup(Lookup.class);
LOG.log(Level.FINER, "Searching for {0} in {1} yields {2}", new Object[]{Lookup.class, misl, defaultLookup});
if (defaultLookup != null) {
Lookup.Provider prov = misl.lookup(Lookup.Provider.class);
LOG.log(Level.FINER, "Searching for {0} in {1} yields {2}", new Object[]{Lookup.Provider.class, misl, defaultLookup});
if (prov != null) {

代码示例来源：origin: org.netbeans.modules/org-netbeans-modules-apisupport-project

private Set<File> loadPlatformJars() {
  Set<File> jars = new HashSet<File>();
  PlatformJarProvider pjp = prj.getLookup().lookup(PlatformJarProvider.class);
  if (pjp != null) {
    try {
      jars.addAll(pjp.getPlatformJars());
    } catch (IOException x) {
      LOG.log(Level.INFO, null, x);
    }
  }
  return jars;
}

代码示例来源：origin: org.netbeans.modules/org-netbeans-modules-docker-ui

@Override
protected boolean enable(Node[] activatedNodes) {
  for (Node node : activatedNodes) {
    if (node.getLookup().lookup(DockerTag.class) == null) {
      return false;
    }
  }
  return true;
}

代码示例来源：origin: dcaoyuan/nbscala

public NodeList createNodes(Project p) {
  J2SEProject project = p.getLookup().lookup(J2SEProject.class);
  assert project != null;
  return new LibrariesNodeList(project);
}

代码示例来源：origin: org.netbeans.modules/org-netbeans-modules-cnd-makeproject

private boolean hasBrokenIncludes(Project project) {
  BrokenIncludes biProvider = Lookup.getDefault().lookup(BrokenIncludes.class);
  if (biProvider != null) {
    NativeProject id = project.getLookup().lookup(NativeProject.class);
    if (id != null) {
      return biProvider.isBroken(id);
    }
  }
  return false;
}

代码示例来源：origin: org.netbeans.modules/org-netbeans-modules-cnd-editor

public static boolean getGlobalExpandTabs(){
  Preferences global = MimeLookup.getLookup(MimePath.EMPTY).lookup(Preferences.class);
  if (global != null) {
    return global.getBoolean(SimpleValueNames.EXPAND_TABS, expandTabToSpacesDefault);
  }
  return expandTabToSpacesDefault;
}

代码示例来源：origin: org.netbeans.api/org-openide-util

serviceTypeClass = Class.forName(className, true, Lookup.getDefault().lookup(ClassLoader.class));
  clazz = serviceTypeClass.asSubclass(ServiceType.class);
  err.log(Level.FINE, "Service not found", ex); //NOI18N
ServiceType.Registry r = Lookup.getDefault().lookup(ServiceType.Registry.class);
Enumeration en = r.services(clazz);
ServiceType some = r.find(clazz);

代码示例来源：origin: org.netbeans.api/org-openide-awt

/** Implementation of {@link Savable#save} contract. Calls
 * {@link #handleSave} and {@link #unregister}.
 * 
 * @throws IOException if call to {@link #handleSave} throws IOException
 */
@Override
public final void save() throws IOException {
  Template<AbstractSavable> t = new Template<AbstractSavable>(AbstractSavable.class, null, this);
  for (Savable s : Savable.REGISTRY.lookup(t).allInstances()) {
    if (s == this) {
      handleSave();
      unregister();
      return;
    }
  }
  LOG.log(Level.WARNING, "Savable {0} is not in Savable.REGISTRY! " // NOI18N
      + "Have not you forgotten to call register() in constructor?", getClass()); // NOI18N
}

代码示例来源：origin: org.netbeans.modules/org-netbeans-modules-maven-junit-ui

public FileObject getTestcaseFileObject() {
    LineConvertors.FileLocator fileLocator = getProject().getLookup().lookup(LineConvertors.FileLocator.class);
    if(fileLocator == null) {
      Logger.getLogger(MavenJUnitTestMethodNode.class.getName()).log(Level.WARNING, "no LineConvertors.FileLocator available for project {0}", getProject().getProjectDirectory());
    }
    if(testcase == null) {
      Logger.getLogger(MavenJUnitTestMethodNode.class.getName()).log(Level.WARNING, "null tescase in MavenJUnitTestMethodNode for project {0}", getProject().getProjectDirectory());            
    }
    String location = testcase != null ? testcase.getLocation() : null;
    return fileLocator != null && location != null ? fileLocator.find(location) : null;
  }
}

代码示例来源：origin: org.netbeans.api/org-openide-util

/** @return default class loader which is used, when we don't have
* any other class loader. (in function getBundle(String), getLocalizedFile(String),
* and so on...
*/
private static ClassLoader getLoader() {
  ClassLoader c = Lookup.getDefault().lookup(ClassLoader.class);
  return (c != null) ? c : ClassLoader.getSystemClassLoader();
}

代码示例来源：origin: org.netbeans.modules/org-netbeans-modules-docker-ui

@Override
protected boolean enable(Node[] activatedNodes) {
  if (activatedNodes.length != 1) {
    return false;
  }
  return activatedNodes[0].getLookup().lookup(DockerContainer.class) != null;
}

代码示例来源：origin: dcaoyuan/nbscala

public NodeList createNodes(Project p) {
  J2SEProject project = (J2SEProject)p.getLookup().lookup(J2SEProject.class);
  assert project != null;
  return new SourcesNodeList(project);
}

代码示例来源：origin: org.netbeans.modules/org-netbeans-modules-profiler-projectsupport

public static void invokeAction(Project project, String s) {
  ActionProvider ap = project.getLookup().lookup(ActionProvider.class);
  if (ap == null) {
    return; // fail early
  }
  ap.invokeAction(s, Lookup.getDefault());
}

代码示例来源：origin: org.netbeans.modules/org-netbeans-modules-cnd-editor

/**
 * Returns true if bracket completion is enabled in options.
 */
private boolean completionSettingEnabled() {
  Preferences prefs = MimeLookup.getLookup(MIMENames.FORTRAN_MIME_TYPE).lookup(Preferences.class);
  return prefs.getBoolean(SimpleValueNames.COMPLETION_PAIR_CHARACTERS, true);
}

代码示例来源：origin: org.netbeans.api/org-openide-awt

/**
 * Looks for an implementation in global Lookup, if none is found then it falls
 * back to a primitive implementation which displays the notifications in main 
 * window's status line.
 * @return Default implementation.
 */
public static NotificationDisplayer getDefault() {
  NotificationDisplayer res = Lookup.getDefault().lookup(NotificationDisplayer.class);
  if( null == res ) {
    Logger.getLogger( NotificationDisplayer.class.getName()).log( Level.INFO, "No NotificationDisplayer implementation available."); //NOI18N
    res = new SimpleNotificationDisplayer();
  }
  return res;
}

代码示例来源：origin: org.netbeans.api/org-netbeans-modules-j2eeserver

public synchronized RegistryNodeProvider getNodeProvider() {
  if (nodeProvider != null) {
    return nodeProvider;
  }
  RegistryNodeFactory nodeFact = (RegistryNodeFactory) lkp.lookup(RegistryNodeFactory.class);
  if (nodeFact == null) {
    String msg = NbBundle.getMessage(Server.class, "MSG_NoInstance", name, RegistryNodeFactory.class);
    LOGGER.log(Level.INFO, msg);
  }
  nodeProvider = new RegistryNodeProvider(nodeFact); //null is acceptable
  return nodeProvider;
}

代码示例来源：origin: org.netbeans.api/org-openide-filesystems

private static ClassLoader loader() {
  ClassLoader l = Lookup.getDefault().lookup(ClassLoader.class);
  if (l == null) {
    l = FOItem.class.getClassLoader();
  }
  return l;
}

代码示例来源：origin: eu.agrosense.client/grid-api

private boolean accept(Node node) {
    return node.getLookup().lookup(FileObject.class) == null 
        || !node.getLookup().lookup(FileObject.class).isFolder();
  }
}