import com.sun.hotspot.igv.data.serialization.XMLParser.ParseMonitor; //导入依赖的package包/类
@Override
protected Group start() throws SAXException {
    Group group = new Group();
    Parser.this.difference = false;
    String differenceProperty = this.readAttribute(DIFFERENCE_PROPERTY);
    if (differenceProperty != null && (differenceProperty.equals("1") || differenceProperty.equals("true"))) {
        Parser.this.difference = true;
    }

    ParseMonitor monitor = getMonitor();
    if (monitor != null) {
        monitor.setState(group.getName());
    }

    return group;
}
 

import com.sun.hotspot.igv.data.serialization.XMLParser.ParseMonitor; //导入依赖的package包/类
public GraphDocument parse(InputSource source, XMLParser.ParseMonitor monitor) throws SAXException {
    XMLReader reader = createReader();

    reader.setContentHandler(new XMLParser(xmlDocument, monitor));
    try {
        reader.parse(source);
    } catch (IOException ex) {
        throw new SAXException(ex);
    }

    return graphDocument;
}
 

import com.sun.hotspot.igv.data.serialization.XMLParser.ParseMonitor; //导入依赖的package包/类
public GraphDocument parse(XMLReader reader, InputSource source, XMLParser.ParseMonitor monitor) throws SAXException {
    reader.setContentHandler(new XMLParser(xmlDocument, monitor));
    try {
        reader.parse(source);
    } catch (IOException ex) {
        throw new SAXException(ex);
    }

    return topHandler.getObject();
}