Java by API/javax.xml.validation/Schema

Schema: newValidator()

import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import javax.xml.XMLConstants;
import javax.xml.transform.sax.SAXSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
public class MainClass {
  public static void main(String[] args) throws IOException {
    File documentFile = new File(args[0]);
    File schemaFile = new File(args[1]);
    SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
    Schema schema = null;
    try {
      schema = factory.newSchema(schemaFile);
    } catch (SAXException e) {
      fail(e);
    }
    Validator validator = schema.newValidator();
    SAXSource source = new SAXSource(new InputSource(new FileReader(documentFile)));
    try {
      validator.validate(source);
    } catch (SAXException e) {
      fail(e);
    }
  }
  static void fail(SAXException e) {
    if (e instanceof SAXParseException) {
      SAXParseException spe = (SAXParseException) e;
      System.err.printf("%s:%d:%d: %s%n", spe.getSystemId(), spe.getLineNumber(), spe
          .getColumnNumber(), spe.getMessage());
    } else {
      System.err.println(e.getMessage());
    }
    System.exit(1);
  }
}