Examples of java.lang.NullPointerException

java.lang.NullPointerException
Thrown when an application attempts to use null in a case where an object is required. These include:
- Calling the instance method of a null object.
- Accessing or modifying the field of a null object.
- Taking the length of null as if it were an array.
- Accessing or modifying the slots of null as if it were an array.
- Throwing null as if it were a Throwable value.
Applications should throw instances of this class to indicate other illegal uses of the null object. @author unascribed @version 1.20, 11/17/05 @since JDK1.0

public ClassName getClassNameAttribute (String attrName) throws NullPointerException, IOException
    {
  if (_nameService != null)
      return _nameService.getClassNameAttribute(_name, attrName);
  else
      throw new NullPointerException(tsLogger.log_mesg.getString("com.arjuna.ats.arjuna.gandiva.ObjectName_3"));
    }

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public Uid getUidAttribute (String attrName) throws NullPointerException, IOException
    {
  if (_nameService != null)
      return _nameService.getUidAttribute(_name, attrName);
  else
      throw new NullPointerException(tsLogger.log_mesg.getString("com.arjuna.ats.arjuna.gandiva.ObjectName_3"));
    }

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public void setLongAttribute (String attrName, long value) throws NullPointerException, IOException
    {
  if (_nameService != null)
      _name = _nameService.setLongAttribute(_name, attrName, value);
  else
      throw new NullPointerException(tsLogger.log_mesg.getString("com.arjuna.ats.arjuna.gandiva.ObjectName_3"));
    }

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public void setStringAttribute (String attrName, String value) throws NullPointerException, IOException
    {
  if (_nameService != null)
      _name = _nameService.setStringAttribute(_name, attrName, value);
  else
      throw new NullPointerException(tsLogger.log_mesg.getString("com.arjuna.ats.arjuna.gandiva.ObjectName_3"));
    }

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public void setObjectNameAttribute (String attrName, ObjectName value) throws NullPointerException, IOException
    {
  if (_nameService != null)
      _name = _nameService.setObjectNameAttribute(_name, attrName, value);
  else
      throw new NullPointerException(tsLogger.log_mesg.getString("com.arjuna.ats.arjuna.gandiva.ObjectName_3"));
    }

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public void setClassNameAttribute (String attrName, ClassName value) throws NullPointerException, IOException
    {
  if (_nameService != null)
      _name = _nameService.setClassNameAttribute(_name, attrName, value);
  else
      throw new NullPointerException(tsLogger.log_mesg.getString("com.arjuna.ats.arjuna.gandiva.ObjectName_3"));
    }

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public void setUidAttribute (String attrName, Uid value) throws NullPointerException, IOException
    {
  if (_nameService != null)
      _name = _nameService.setUidAttribute(_name, attrName, value);
  else
      throw new NullPointerException(tsLogger.log_mesg.getString("com.arjuna.ats.arjuna.gandiva.ObjectName_3"));
    }

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public String uniqueAttributeName () throws NullPointerException, IOException
    {
  if (_nameService != null)
      return _nameService.uniqueAttributeName(_name);
  else
      throw new NullPointerException(tsLogger.log_mesg.getString("com.arjuna.ats.arjuna.gandiva.ObjectName_3"));
    }

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public int attributeType (String objName, String attr) throws NullPointerException, IOException
    {
  if (_imple != null)
      return _imple.attributeType(objName, attr);
  else
      throw new NullPointerException("Implementation not set");
    }

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public String firstAttributeName (String objName) throws NullPointerException, IOException
    {
  if (_imple != null)
      return _imple.firstAttributeName(objName);
  else
      throw new NullPointerException("Implementation not set");
    }

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