How to use

remove

method

in

org.jfree.util.DefaultConfiguration

/**
 * Sets a parser configuration value.
 *
 * @param key   the key.
 * @param value the value.
 */
public void setConfigProperty(final String key, final String value) {
  if (value == null) {
    this.parserConfiguration.remove(key);
  }
  else {
    this.parserConfiguration.setProperty(key, value);
  }
}

 /**
  * Sets the value of a configuration property.
  *
  * @param key   the property key.
  * @param value the property value.
  */
 public void setConfigProperty(final String key, final String value)
 {
  if (value == null)
  {
   remove(key);
  }
  else
  {
   setProperty(key, value);
  }
 }
}

 /**
  * Sets the value of a configuration property.
  *
  * @param key   the property key.
  * @param value the property value.
  */
 public void setConfigProperty(final String key, final String value)
 {
  if (value == null)
  {
   remove(key);
  }
  else
  {
   setProperty(key, value);
  }
 }
}

 /**
  * Sets the value of a configuration property.
  *
  * @param key   the property key.
  * @param value the property value.
  */
 public void setConfigProperty(final String key, final String value)
 {
  if (value == null)
  {
   remove(key);
  }
  else
  {
   setProperty(key, value);
  }
 }
}