From the quick tech Glossary

Java
Java is a programming language developed by Sun Microsystems, to write programs which can safely be downloaded from the Internet and run without causing harm to your computer through viruses.

Java is perfect for general-purpose programming, applications and creating applets.

the elements of web development

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Software Editors for Web Design

Software editors are programs that enable the web developer to efficiently design websites. These are the two major types:

HTML-based Editors

HTML editors are software programs that work from the basic mark-up language, allowing the user/ designer to work from the source-level. Aside from normal text editors, there are dedicated HTML editor programs such as Notetab and Editplus. Please visit our links section for more.

WYSIWYG

WYSIWYG or 'What You See Is What You Get' works by allowing the designer to create the design as it will appear online, as opposed to using HTML, whose underlying language defines the appearance of the page. A popular example of this is Dreamweaver by Macromedia. Please visit our links section for more.