The Java language was developed by Sun (who were purchased by
Oracle in 2009)
Two presentations on Java are available. You may want to look at
"A Brief Introduction to Java"
first, then move on to
"Java Programming in One Hour".
Note that these are designed as sets of 'slides' to be shown to an
audience. Each page has links to the related slides, forward and backward
links and a link to the notes that go with the slide.
It is now unlikely that the example Java applets in the second
presentation will work in a Web browser. The technology behind
them may have been cutting edge in the 1990's, but it is now
obsolete and no longer supported by modern browsers.