HTML, CSS, and JavaScript
HTML, CSS, and JavaScript are client-side technologies. These are extremely important for web applications, and a professional Java developer should have some knowledge about them. Nobody expects you to be an expert in Java and in web-client technologies at the same time, though this is not impossible. A certain understanding is desirable.
HTML is the textual representation of a structured text. The text is given as characters, as in any text file. Tags represent the structure. A start tag starts with a < character, then the name of the tag, then, optionally, name="value" attributes, and finally a closing > character. An end tag starts with </, then the name of the tag, and then >. Tags are enclosed into hierarchies; ...
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