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Figure 5.3: Change the directory Chapter Five: Object oriented programming with Java

Step 5: After compiling the file successfully, the command prompt will jump to
next line. Type “java” followed by file name, in this case, “Tunalianzisha”
then enter to run the program. The message “Hello Tanzanians” will
appear, as in Figure 5.4.

Figure 5.4: Hello Tanzanians message

Note: Description of each line of codes in a
simple program in Activity 4.2
(a) Make sure a class starts with an The keywords used in your first program
uppercase first letter. For example are as follows:
“class Tunalianzisha”, T-is an (a) The “class” keyword in Java is utilised
uppercase. to declare a class.

(b) Java is Case-sensitive, meaning that (b) public: keyword serves as an access
if you type “tunalianzisha” instead modifier. It indicates that the main
of “Tunalianzisha” might bring an method is accessible from anywhere
error. outside the class.
(c) static: It indicates that the main
(c) The compiled code in Java is known method belongs to the class itself
as bytecode, after compiling the rather than to any specific instance of

program the new file with the .class the class. When a method is declared
extension will be created. as “static”, it’s referred to as a static

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Student’s Book Form Five

Computer Science Form 5.indd 319 23/07/2024 12:34