java.lang.NullPointerException.toString()方法的使用及代码示例

x33g5p2x  于2022-01-17 转载在 其他  
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本文整理了Java中java.lang.NullPointerException.toString()方法的一些代码示例，展示了NullPointerException.toString()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。NullPointerException.toString()方法的具体详情如下：
包路径：java.lang.NullPointerException
类名称：NullPointerException
方法名：toString

NullPointerException.toString介绍

暂无

代码示例

代码示例来源：origin: JorgeCastilloPrz/AndroidFillableLoaders

public void showStateHint(int state) {
  try {
   Snackbar.make(fab, "State changed callback: " + state, Snackbar.LENGTH_SHORT).show();
  } catch (NullPointerException e) {
   Log.d("showStateHint", e.toString());
  }
 }
}

代码示例来源：origin: apache/hbase

@Override
public void close() throws IOException {
 if (this.output != null) {
  try {
   if (!trailerWritten) {
    writeWALTrailer();
   }
   this.output.close();
  } catch (NullPointerException npe) {
   // Can get a NPE coming up from down in DFSClient$DFSOutputStream#close
   LOG.warn(npe.toString(), npe);
  }
  this.output = null;
 }
}

代码示例来源：origin: com.google.inject/guice

/**
 * Throws a ConfigurationException with an NullPointerExceptions as the cause if the given
 * reference is {@code null}.
 */
static <T> T checkNotNull(T reference, String name) {
 if (reference != null) {
  return reference;
 }
 NullPointerException npe = new NullPointerException(name);
 throw new ConfigurationException(ImmutableSet.of(new Message(npe.toString(), npe)));
}

代码示例来源：origin: apache/hbase

@Override
 public void run() {
  try {
   LOG.info("Hook closing fs=" + this.fs);
   this.fs.close();
  } catch (NullPointerException npe) {
   LOG.debug("Need to fix these: " + npe.toString());
  } catch (IOException e) {
   LOG.warn("Running hook", e);
  }
 }
}

代码示例来源：origin: ReactiveX/RxJava

@Test
public void subscribeThrows() {
  try {
    new Single<Integer>() {
      @Override
      protected void subscribeActual(SingleObserver<? super Integer> observer) {
        throw new IllegalArgumentException();
      }
    }.test();
  } catch (NullPointerException ex) {
    if (!(ex.getCause() instanceof IllegalArgumentException)) {
      fail(ex.toString() + ": should have thrown NPE(IAE)");
    }
  }
}

代码示例来源：origin: ReactiveX/RxJava

@Test
  public void callbackCrash() {
    try {
      Observable.just(1)
      .lift(new ObservableOperator<Object, Integer>() {
        @Override
        public Observer<? super Integer> apply(Observer<? super Object> o) throws Exception {
          throw new TestException();
        }
      })
      .test();
      fail("Should have thrown");
    } catch (NullPointerException ex) {
      assertTrue(ex.toString(), ex.getCause() instanceof TestException);
    }
  }
}

代码示例来源：origin: ReactiveX/RxJava

@Test
public void sourceThrowsIAE() {
  try {
    Maybe.unsafeCreate(new MaybeSource<Object>() {
      @Override
      public void subscribe(MaybeObserver<? super Object> observer) {
        throw new IllegalArgumentException("Forced failure");
      }
    }).test();
    fail("Should have thrown!");
  } catch (NullPointerException ex) {
    assertTrue(ex.toString(), ex.getCause() instanceof IllegalArgumentException);
    assertEquals("Forced failure", ex.getCause().getMessage());
  }
}

代码示例来源：origin: konsoletyper/teavm

index = spec.indexOf(':');
} catch (NullPointerException e) {
  throw new TMalformedURLException(e.toString());

代码示例来源：origin: ReactiveX/RxJava

@Test
public void subscribeActualThrows() {
  List<Throwable> list = TestHelper.trackPluginErrors();
  try {
    try {
      new BadObservable().test();
      fail("Should have thrown!");
    } catch (NullPointerException ex) {
      if (!(ex.getCause() instanceof IllegalArgumentException)) {
        fail(ex.toString() + ": Should be NPE(IAE)");
      }
    }
    TestHelper.assertError(list, 0, IllegalArgumentException.class);
  } finally {
    RxJavaPlugins.reset();
  }
}

代码示例来源：origin: ReactiveX/RxJava

@Test
  public void subscribeActualThrows() {
    List<Throwable> list = TestHelper.trackPluginErrors();
    try {
      try {
        new BadFlowable().test();
        fail("Should have thrown!");
      } catch (NullPointerException ex) {
        if (!(ex.getCause() instanceof IllegalArgumentException)) {
          fail(ex.toString() + ": Should be NPE(IAE)");
        }
      }

      TestHelper.assertError(list, 0, IllegalArgumentException.class);
    } finally {
      RxJavaPlugins.reset();
    }
  }
}

代码示例来源：origin: ReactiveX/RxJava

@Test
  public void unsafeCreateThrowsIAE() {
    List<Throwable> errors = TestHelper.trackPluginErrors();
    try {
      Completable.unsafeCreate(new CompletableSource() {
        @Override
        public void subscribe(CompletableObserver observer) {
          throw new IllegalArgumentException();
        }
      }).test();
      fail("Should have thrown!");
    } catch (NullPointerException ex) {
      if (!(ex.getCause() instanceof IllegalArgumentException)) {
        fail(ex.toString() + ": should have thrown NPA(IAE)");
      }

      TestHelper.assertError(errors, 0, IllegalArgumentException.class);
    } finally {
      RxJavaPlugins.reset();
    }
  }
}

代码示例来源：origin: ReactiveX/RxJava

@Test
  public void callbackCrash() {
    List<Throwable> errors = TestHelper.trackPluginErrors();
    try {
      Flowable.just(1)
      .lift(new FlowableOperator<Object, Integer>() {
        @Override
        public Subscriber<? super Integer> apply(Subscriber<? super Object> subscriber) throws Exception {
          throw new TestException();
        }
      })
      .test();
      fail("Should have thrown");
    } catch (NullPointerException ex) {
      assertTrue(ex.toString(), ex.getCause() instanceof TestException);
      TestHelper.assertUndeliverable(errors, 0, TestException.class);
    } finally {
      RxJavaPlugins.reset();
    }
  }
}

代码示例来源：origin: org.sonatype.sisu/sisu-guice

/**
 * Throws a ConfigurationException with an NullPointerExceptions as the cause if the given
 * reference is {@code null}.
 */
static <T> T checkNotNull(T reference, String name) {
 if (reference != null) {
  return reference;
 }
 NullPointerException npe = new NullPointerException(name);
 throw new ConfigurationException(ImmutableSet.of(new Message(npe.toString(), npe)));
}

代码示例来源：origin: org.xbib/guice

static <T> T checkNotNull(T reference, String name) {
  if (reference != null) {
    return reference;
  }
  NullPointerException npe = new NullPointerException(name);
  throw new ConfigurationException(ImmutableSet.of(
      new Message(npe.toString(), npe)));
}

代码示例来源：origin: org.apache.hbase/hbase-server

@Override
 public void run() {
  try {
   LOG.info("Hook closing fs=" + this.fs);
   this.fs.close();
  } catch (NullPointerException npe) {
   LOG.debug("Need to fix these: " + npe.toString());
  } catch (IOException e) {
   LOG.warn("Running hook", e);
  }
 }
}

代码示例来源：origin: openmrs/openmrs-contrib-android-client

private static Date parseString(String dateAsString, DateFormat format) throws ParseException {
  Date formattedDate = null;
  try {
    formattedDate = format.parse(dateAsString);
  } catch (NullPointerException e) {
    OpenMRS.getInstance().getOpenMRSLogger().w("Failed to parse date :" + dateAsString + " caused by " + e.toString());
  }
  return formattedDate;
}

代码示例来源：origin: EvoSuite/evosuite

@Override
public String toString() {
  if(!MockFramework.isEnabled()){
    return super.toString();
  }
  return getDelegate().toString();
}

代码示例来源：origin: jclouds/legacy-jclouds

public void testDoNotRetryOnGeneralSftpError() {
 // http://sourceforge.net/mailarchive/forum.php?thread_name=CAARMrHVhASeku48xoAgWEb-nEpUuYkMA03PoA5TvvFdk%3DjGKMA%40mail.gmail.com&forum_name=jsch-users
 assert !ssh.shouldRetry(new SftpException(ChannelSftp.SSH_FX_FAILURE, new NullPointerException().toString()));
}

代码示例来源：origin: jclouds/legacy-jclouds

public void testCreatePostRequestNullNotOk1() throws SecurityException, NoSuchMethodException, IOException {
 Invokable<?, ?> method = method(TestPost.class, "postNonnull", String.class);
 try {
   GeneratedHttpRequest request = processor.apply(Invocation.create(method,
      Lists.<Object> newArrayList((String) null)));
   Assert.fail("call should have failed with illegal null parameter, not permitted " + request + " to be created");
 } catch (NullPointerException e) {
   Assert.assertTrue(e.toString().indexOf("postNonnull parameter 1") >= 0,
      "Error message should have referred to 'parameter 1': " + e);
 }
}

代码示例来源：origin: akarnokd/RxJava2Extensions

@Test
public void subscribeActual2() {
  try {
    new Nono() {
      @Override
      protected void subscribeActual(Subscriber<? super Void> s) {
        throw new IllegalArgumentException();
      }
    }.test(false);
  } catch (NullPointerException ex) {
    Assert.assertTrue(ex.toString(), ex.getCause() instanceof IllegalArgumentException);
  }
}

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