Main.java Source code

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Here is the source code for Main.java

Source

import java.io.File;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class Main {
    public static void main(String[] args) throws Exception {
        List<Car> carsList = new ArrayList<Car>();
        Set<Car> carsset = new HashSet<Car>();
        File fXmlFile = new File("cars.xml");
        DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
        Document doc = dBuilder.parse(fXmlFile);
        doc.getDocumentElement().normalize();
        NodeList nList = doc.getElementsByTagName("cars");
        Car tempCar = null;
        for (int temp = 0; temp < nList.getLength(); temp++) {
            Node nNode = nList.item(temp);
            if (nNode.getNodeType() == Node.ELEMENT_NODE) {
                tempCar = new Car();
                Element eElement = (Element) nNode;
                tempCar.setModel(eElement.getElementsByTagName("model").item(0).getTextContent());
                tempCar.setVersion(eElement.getElementsByTagName("version").item(0).getTextContent());
                carsList.add(tempCar);
                carsset.add(tempCar);

            }
        }
        for (Car cs : carsset) {
            int count = 0;
            for (Car cl : carsList) {
                if (cs.equals(cl)) {
                    count = count + 1;
                }
            }
            System.out.println(cs + "\t" + count);
        }
    }
}

class Car {
    private String model;
    private String version;

    public String getModel() {
        return model;
    }

    public void setModel(String model) {
        this.model = model;
    }

    public String getVersion() {
        return version;
    }

    public void setVersion(String version) {
        this.version = version;
    }

    @Override
    public boolean equals(Object obj) {
        if (this.model.equals(((Car) obj).getModel()) && this.version.equals(((Car) obj).getVersion())) {
            return true;
        }
        return false;
    }

    @Override
    public int hashCode() {
        return this.model.length() + this.version.length();
    }

    @Override
    public String toString() {
        return this.model + "\t " + this.version;
    }
}