JAVA TEACHER FOR STUDENTS

All the Java material you need as an IEB Information Technology (IT) student in South Africa.

Java Teacher does focus on IEB material for South African students doing grade 10, 11 and matric computer science but the resources in this website will assist first year IT university students as well.  

How to use this site

Java Teacher is not a sequential Java textbook. Instead, it is a Java and SQL encyclopedia.

There are two ways to get help.

  1. On the right, you will find the topics sorted by grades.
  2. On the top right you will find a search bar where you can search by keywords eg class diagram, rounding, tracetables, debug etc
  3.  This site is based on the Java by Example approach – less explanation and more examples. View or download the coded examples and study them, code them, run them, edit them, break them . . . this is how professional coders learn.
  4. There are two “Java by Example” textbooks that are a companion to this website. These textbooks offer an sequential learning experience grade by grade.

Steve Eilertsen – steve.eilertsen@gmail.com

Java Teacher is passionately built and supported by Steve Eilertsen, an IT teacher at a private school in Johannesburg.

“This is my give-back strategy for IT learners who are passionate and gifted but do not have access to a suitable teacher.”

Online tutoring is available for matric learners in preperation for the PAT, Prelims and Finals for the remainder of 2026.

Gr 12 – The Law

The South Africa SAGS (syllabus) for IT specifically mentions 4 pieces of legislation in the Social and Ethical Issues part of the syllabus.  Here below is a overview of each taken from Google . . .  The Protection from Harassment Act This provides a legal remedy for...

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Gr 11 Elegant Code

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Elegant Java code is a thing. Ask any straight-A coding student who has tried to help a non-performing class mate. "Bad" code is difficult to understand. By contrast elegant code is easy, quick and a breeze to troubleshoot. So what makes elegant code? It starts with...

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Gr 10 – All about loops

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Here are 8 looping Java programs in a Notepad ++ format. They feature the "for loop" and the "while loop". Some run and some do not and some are infinite loops. Click here for the code Class Loops with not run because when using JOptionPane the input arrives as a...

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Gr 12 – Theory revision

IT Theory revision, overviews and cheatsheets for your IEB Theory tests and exams. NB: These are cheatsheets - they are most useful when you have studied your work thoroughly from a more detailed text book already. Forty IT terms you need to know. Theory key concepts...

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Gr 11 12 Not !

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In Java "not" is a bit awkward when used with a String method like "equals" if (name.equals("steve") {    } is easy to understand. If the name equals "steve" then execute the code block that follows. What about if the name does not equal steve? if ( !...

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Gr 11 – Switch Case

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Complex "if-then-else" statements are needed when there are many options e.g. consider all the options in a menu. Fortunately, there is a better way when a lot of options are needed i.e. the "Switch-Case-Break" construct. It works exactly the same as "if-else" but its...

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Gr 12 OOP theory prac notes

Here are Java OOP theory summary notes and Java OOP practical notes. These notes are not my own but were given to me by one of my students so I do not know who the original author is OOP theory OOP practical

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