https://jsoup.org/: jsoup is a Java library for working with real-world HTML. It provides a very convenient API for extracting and manipulating data, using the best of DOM, CSS, and jquery-like methods. jsoup implements the WHATWG HTML5 specification, and parses HTML to the same DOM as modern browsers do. (Jonathan Hedley)
  • Jonathan Hedley 
package org.jsoup.nodes;


A boolean attribute that is written out without any value.

Deprecated:just use null values (vs empty string) for booleans.
/**
 * A boolean attribute that is written out without any value.
 * @deprecated just use null values (vs empty string) for booleans.
 */
public class BooleanAttribute extends Attribute {
    
Create a new boolean attribute from unencoded (raw) key.

Params:
  • key – attribute key
/**
     * Create a new boolean attribute from unencoded (raw) key.
     * @param key attribute key
     */
    public BooleanAttribute(String key) {
        super(key, null);
    }

    @Override
    protected boolean isBooleanAttribute() {
        return true;
    }
}