Lesson Plan
Course Title: Computer Programming
Session Title: Your First Java Program: HelloWorld.java
Lesson Duration:
2 hours
Performance Objective:
Upon completion of this assignment, the student will be able to write, compile, and troubleshoot
a Java program.
Specific Objectives:




Students will write and compile a simple Java program
Students will troubleshoot and correct errors in a Java program
Students will revise their own program to include specific errors
Students will identify specific lines of a program
Preparation
TEKS Correlations: 130.276.Computer Programming
• (1E) Solve problems and think critically;
• (7D) Demonstrate skill in program testing;
• (7E) Compare computed results with anticipated results to determine the
reasonableness of the solutions;
• (7F) Troubleshoot technological problems.
Instructor/Trainer
References:
• Content-developer knowledge
Instructional Aids:
• Instructional Presentation
• Lab Handout: HelloWorld
• Lab Solution
• Lab Quiz
• Lab Quiz - Solution
Materials Needed:
Each student will need a copy of Lab Handout.
IT: Beginning Computer Programming: First Java Program Lesson Plan
Copyright © Texas Education Agency, 2013
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Equipment Needed:
Each student will need a computer with Java installed and/or an IDE installed (JCreator,
Eclipse, etc.). There is no charge for these programs.
The instructor should also have the IDE installed, and be able to use a projector for
demonstration.
Introduction
MI
Introduction (LSI Quadrant I):
Before introducing the HelloWorld program, visit Wikipedia.org and search
"HelloWorld". Show students that the program is a classic "first" program for any
student learning a new programming language.
Outline
MI
Outline (LSI Quadrant II):
Instructor Notes:
The instructor will introduce the new concepts using
the presentation. Outline of each slide shown below:
Students will watch the
teacher during this section.
They should be encouraged
to take notes and write
comments during the
presentation.
1. Explain that “HelloWorld” is the classic first
program for any student who is learning a
new programming language. It demonstrates
that you can put together a small program,
compile it, and run with intended results.
2. The entire HelloWorld program is shown with
10 lines of code. You can choose to type it in
at this point, or to evaluate line-by-line. You
can use your choice of IDE (Integrated
Development Environment) to type, compile,
and run your program.
3. Comments give information to the reader;
they are ignored by the compiler. Comments
are indicated by the double-slashes at the
beginning of the line. The comments should
be new color depending on the IDE used.
4. Program declaration is the required first line
of the program. It shows the name of the
program, and must match the file name as it
is saved. On this line, “public” and “class” are
reserved words and will be a different color in
your IDE. “HelloWorld” is a user-defined
word and shows the name of the program.
5. Curly braces are used to separate parts of
IT: Beginning Computer Programming: First Java Program Lesson Plan
Copyright © Texas Education Agency, 2013
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the program into “blocks”. Every open brace
must have a closing brace. Braces are
nested inside the program.
6. Line 6 sets up the first line of the main
method. This is where the Java runtime
looks to begin reading the code for execution.
Java reserved words on this line are “public”,
“static”, “void”. The word “main” is not
reserved, but must be included in your main
application program.
7. Line 7 shows the beginning of the second set
of curly braces. Indentation helps to organize
the code into readable sections. Indentation
is not required, but shows good programming
style.
8. Line 8 is the actual statement that does
something that you can see. The command
to show output on the screen in Java is
“System.out.println”. The “S” must be
capitalized or the compiler will not understand
the statement. Your desired output is shown
in parentheses and the actual string to be
printed is enclosed in quotes. Java requires
that statements end with a semicolon.
9. Line 9 is the closing brace to line 7 and Line
10 is the closing brace to line 5. Once again,
the indentation helps you to see where the
blocks begin and end.
10. Line 10 shows the intended output of the
program. When all compiler errors are fixed,
the “Hello World!” message should be
displayed in the output section of your IDE.
11. At this point, you should type the program
and demonstrate to students. Upon
completion of a successful "HelloWorld"
program, the instructor should introduce
errors to the program, describe the errors,
and correct the errors.
12. It is helpful to the students for you to
demonstrate errors before the students
actually code their own program. Show how
minor changes can introduce many compiler
errors. Show at least 3 compiler errors.
Compiler errors can be: misspelled reserved
words, missing semicolon, missing quotes,
and missing curly braces. Be careful to fix
each error as it occurs and let the students
IT: Beginning Computer Programming: First Java Program Lesson Plan
Copyright © Texas Education Agency, 2013
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see only one error at a time.
After you have successfully demonstrated a
complete program and introduced errors, the
students will have the opportunity to create their own
“HelloWorld” program.
Application
MI
Independent Practice (LSI Quadrant III):
•
Students will complete the lab with associated error definitions.
Summary
MI
Review (LSI Quadrants I and IV):
•
Students will play with more errors. Ask them to see how many different
errors they can find. Also, ask them to create an error and have their
neighbor fix the error.
Evaluation
MI
Informal Assessment (LSI Quadrant III):
•
MI
The instructor will walk around the room and observe the students during the
lab. Encourage students to fix their own errors. Be careful not to give too
much advice!
Formal Assessment (LSI Quadrant III, IV):
•
Quiz
Extension
MI
Extension/Enrichment (LSI Quadrant IV):
•
Students should practice fixing their own errors. This step is critical in future
programs where they find themselves stumped and are not able to read the
error messages effectively.
IT: Beginning Computer Programming: First Java Program Lesson Plan
Copyright © Texas Education Agency, 2013
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Icon
MI
Verbal/
Linguistic
Logical/
Mathematical
Visual/Spatial
Musical/
Rhythmic
Bodily/
Kinesthetic
Intrapersonal
Interpersonal
Naturalist
Existentialist
Teaching Strategies
Personal Development
Strategies
Lecture, discussion, journal
writing, cooperative learning,
word origins
Reading, highlighting, outlining,
teaching others, reciting information
Problem solving, number
games, critical thinking,
classifying and organizing,
Socratic questioning
Mind-mapping, reflective
time, graphic organizers,
color-coding systems,
drawings, designs, video,
DVD, charts, maps
Use music, compose songs
or raps, use musical
language or metaphors
Organizing material logically, explaining
things sequentially, finding patterns,
developing systems, outlining, charting,
graphing, analyzing information
Developing graphic organizers, mindmapping, charting, graphing, organizing
with color, mental imagery (drawing in
the mind’s eye)
Use manipulatives, hand
signals, pantomime, real life
situations, puzzles and board
games, activities, roleplaying, action problems
Reflective teaching,
interviews, reflective listening,
KWL charts
Cooperative learning, roleplaying, group brainstorming,
cross-cultural interactions
Natural objects as
manipulatives and as
background for learning
Socratic questions, real life
situations, global
problems/questions
Creating rhythms out of words, creating
rhythms with instruments, playing an
instrument, putting words to existing
songs
Moving while learning, pacing while
reciting, acting out scripts of material,
designing games, moving fingers under
words while reading
Reflecting on personal meaning of
information, studying in quiet settings,
imagining experiments, visualizing
information, journaling
Studying in a group, discussing
information, using flash cards with
other, teaching others
Connecting with nature, forming study
groups with like minded people
Considering personal relationship to
larger context
IT: Beginning Computer Programming: First Java Program Lesson Plan
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NAME
DATE
LAB HelloWorld.java
1. Enter the following program.
2. Compile and run the program. You should have a working program before you go on to the
next step.
// Name: your name here
// Date: today’s date here
// Program: HelloWorld.java
public class HelloWorld
{
public static void main (String[] args)
{
System.out.println ("Hello World!");
}
}
3. Introduce the following errors into the program above. Make the changes ONE AT A TIME;
recompile; record the error message on this paper. Fix the previous error each time before
you go to the next. If no error happens, explain why.
a. ____________________________________________________________________ cha
nge HelloWorld to helloworld
________________________________________________________________
b. ____________________________________________________________________ cha
nge Hello to HELLO
________________________________________________________________
c. ____________________________________________________________________ re
move the first quotation mark in the string
________________________________________________________________
d.
remove the last quotation mark in the string
________________________________________________________________
e.
change main to man
________________________________________________________________
f.
change println to bob
________________________________________________________________
g.
remove the semicolon at the end of the println statement
IT: Beginning Computer Programming: First Java Program Lesson Plan
Copyright © Texas Education Agency, 2013
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________________________________________________________________
h.
remove the last brace (}) in the program
________________________________________________________________
IT: Beginning Computer Programming: First Java Program Lesson Plan
Copyright © Texas Education Agency, 2013
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NAME
DATE
LAB HelloWorld.java Solution
1. Enter the following program.
2. Compile and run the program. You should have a working program before you go on to the
next step.
// Name: your name here
// Date: today’s date here
// Program: HelloWorld.java
public class HelloWorld
{
public static void main (String[] args)
{
System.out.println ("Hello World!");
}
}
3. Introduce the following errors into the program above. Make the changes ONE AT A TIME;
recompile; record the error message on this paper. Fix the previous error each time before
you go to the next. If no error happens, explain why.
i. _____________________________________________________________________ cha
nge HelloWorld to helloworld
class helloworld is public; should be declared in a file named helloworld.java ___
j. _____________________________________________________________________ cha
nge "Hello World!" to "HELLO WORLD"!
no error because strings can contain any combination of characters and symbols
k. ____________________________________________________________________ re
move the first quotation mark in the string
')' expected
Yes. This one change
unclosed string literal
prompted 3 errors!
not a statement____________________________________________________
l.
remove the last quotation mark in the string
unclosed string literal
';' expected
reached end of file while parsing ______________________________________
m.
change main to man
no compiler errors, but the program will not execute; this is a run-time error ____
n.
change println to printline
cannot find symbol method printline(java.lang.String) ______________________
IT: Beginning Computer Programming: First Java Program Lesson Plan
Copyright © Texas Education Agency, 2013
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o.
remove the semicolon at the end of the println statement
';' expected _______________________________________________________
p.
remove the last brace (}) in the program
reached end of file while parsing ______________________________________
IT: Beginning Computer Programming: First Java Program Lesson Plan
Copyright © Texas Education Agency, 2013
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NAME
DATE
Hello World Quiz
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// Name:
J. Programmer
public class Quiz
{
public static void main(String [] args)
{
System.out.println ("This is a quiz.");
}
}
Write the line number associated with the phrase: (numbers may be used more than
once or not at all)
1.
____
program declaration
2.
____
statement
3.
____
comment
4.
____
shows the name of the program
5.
____
declares the main method
6.
____
shows the text that will be displayed
7.
____
ends the main method
8.
____
gives information to the reader
9.
____
shows that the program is available to the public
10.
____
shows the name of the programmer
Write a complete program to display your birthday. Include comments with your name,
date, and program name.
IT: Beginning Computer Programming: First Java Program Lesson Plan
Copyright © Texas Education Agency, 2013
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NAME
DATE
Hello World Quiz Solution
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7
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// Name: J. Programmer
public class Quiz
{
public static void main(String [] args)
{
System.out.println ("This is a quiz.");
}
}
Write the line number associated with the phrase: (numbers may be used more than
once or not at all)
1.
___ 3
program declaration
2.
___ 7
statement
3.
___ 1
comment
4.
___ 3
shows the name of the program
5.
___ 5
declares the main method
6.
___ 7
shows the text that will be displayed
7.
___ 8
ends the main method
8.
___ 1
gives information to the reader
9.
___ 3
shows that the program is available to the public
10.
___ 1
shows the name of the programmer
Write a complete program to display your birthday. Include comments with your name,
date, and program name. Name the program ShowBirthday.
// Name: J. Programmer
// Date: today's date
// Program: ShowBirthday.java
public class ShowBirthday
{
public static void main(String [] args)
{
System.out.println ("January 1, 2000");
}
}
IT: Beginning Computer Programming: First Java Program Lesson Plan
Copyright © Texas Education Agency, 2013
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