How to create address locators

String dataGDB = "C:\\data\Atlanta.gdb";
String featureclass = "streets";
//Put quotes around the path name so that it works with spaces.
String referenceData = "\"" + dataGDB + "\\" + featureclass + "\" 'Primary table'";
String locatorName = "Street Locator";
String addressLocatorStyle = "US Address - Dual Ranges";

// The field mapping syntax is "'What geocoding needs' NAME_OF_FIELD_IN_DATASET;"
String fieldMapping = "'*From Left' L_F_ADD;" + "'*To Left' L_T_ADD;" + 
    "'*From Right' R_F_ADD;" + "'*To Right' R_T_ADD;" + "'Prefix Direction' PREFIX;"
    + "'Prefix Type' PRE_TYPE;" + "'*Street Name' NAME;" + "'Street Type' TYPE;" + 
    "'Suffix Direction' SUFFIX" + "'Left City or Place' CITYL" + 
    "'Right City or Place' CITYR" + "'Left ZIP Code' ZIPL" + "'Right ZIP Code' ZIPR"
    + "'Left State' STATE_ABBR" + "'Right State' STATE_ABBR";

GeoProcessor gp = new GeoProcessor();
CreateAddressLocator addressLocatorGPTool = new CreateAddressLocator
    (addressLocatorStyle, referenceData, fieldMapping, dataGDB + "\\" + locatorName);
gp.execute(addressLocatorGPTool, null);

// Open the default local locator workspace to get the locator style.
ILocatorManager2 locatorManager = new LocatorManager();
ILocatorWorkspace locatorWorkspace = locatorManager.getLocatorWorkspaceFromPath("");

// Get the locator style to base the new locator.
ILocatorStyle locatorStyle = locatorWorkspace.getLocatorStyle(
    "US Address - Dual Ranges");

// Open the feature class to use as reference data.
IWorkspaceFactory2 factory = new AccessWorkspaceFactory();
IFeatureWorkspace featureWorkspace = new IFeatureWorkspaceProxy(factory.openFromFile
    ("D:\\workspace\\arcobjects\\location\\redlands.mdb", 0));
IDataset pDataset = new IDatasetProxy(featureWorkspace.openFeatureClass("Streets"));

// Set the feature class as the primary reference data table for the locator.
IReferenceDataTables dataTables = (IReferenceDataTables)locatorStyle;
IEnumReferenceDataTable enumDataTables = dataTables.getTables();
enumDataTables.reset();
IReferenceDataTableEdit dataTableEdit = (IReferenceDataTableEdit)enumDataTables.next
    ();
dataTableEdit.setNameByRef(new ITableNameProxy(pDataset.getFullName()));

// Store the new locator in the same workspace as the reference data.
if (dataTables.isHasEnoughInfo()){
    locatorWorkspace = locatorManager.getLocatorWorkspaceFromPath(
        "D:\\workspace\\arcobjects\\location\\redlands.mdb");
    ILocator locator = locatorWorkspace.addLocator("New Redlands Locator", new
        ILocatorProxy(locatorStyle), "", null);
}

// Open an ArcSDE workspace.
IPropertySet connectionProps = new PropertySet();
connectionProps.setProperty("server", "mendota");
connectionProps.setProperty("instance", "esri_sde");
connectionProps.setProperty("database", "arcobjects");
connectionProps.setProperty("user", "sde");
connectionProps.setProperty("password", "sde");
connectionProps.setProperty("version", "SDE.Default");

IWorkspaceFactory factory = new SdeWorkspaceFactory();
IWorkspace workspace = factory.open(connectionProps, 0);

//Open the database locator workspace for the ArcSDE workspace.
ILocatorManager locatorManager = new LocatorManager();
ILocatorWorkspace locatorWorkspace = locatorManager.getLocatorWorkspace(workspace);


// Get the U.S. streets locator style.
ILocatorStyle locatorStyle = locatorWorkspace.getLocatorStyle(
    "US Address - Dual Ranges");

// Open the feature workspace containing the reference data.
// Set the reference data on the new locator.
IDataset dataset = new IDatasetProxy(new IFeatureWorkspaceProxy(workspace)
    .openFeatureClass("sde.SDE.altanta_st"));
IReferenceDataTables dataTables = (IReferenceDataTables)locatorStyle;
IEnumReferenceDataTable enumDataTables = dataTables.getTables();
enumDataTables.reset();
IReferenceDataTableEdit dataTableEdit = (IReferenceDataTableEdit)enumDataTables.next
    ();
dataTableEdit.setNameByRef(new ITableNameProxy(dataset.getFullName()));

// Store the locator if the reference data is properly specified.
if (dataTables.isHasEnoughInfo()){
    ILocator locator = locatorWorkspace.addLocator("My New SDE Locator", new
        ILocatorProxy(locatorStyle), "", null);
}