Transfer .html to .xhtml with java

ToXHTML.java

public class ToXHTML {

  /**
	*	<dependency>
	*		<groupId>net.sf.jtidy</groupId>
	*		<artifactId>jtidy</artifactId>
	*		<version>r938</version>
	*	</dependency>
  */
  
  @SneakyThrows
	private String convertToXhtml(String html) {
		Tidy tidy = new Tidy();
		tidy.setInputEncoding("UTF-8");
		tidy.setOutputEncoding("UTF-8");
		tidy.setXHTML(true);
		ByteArrayInputStream inputStream = new ByteArrayInputStream(html.getBytes("UTF-8"));
		ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
		tidy.parseDOM(inputStream, outputStream);
		return outputStream.toString("UTF-8");
	}
  
}