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Compiling and Running a Program
When we compile a Java program, the Java compiler converts it into bytecode. This bytecode
is a platform-independent code which can run on any machine without making a single
change. A Java compiler is a program that translates the source code written by us into
machine-readable code.
To compile and run a program, follow the given steps:
1 Click on the Compile button.
If your program is successfully compiled, a message Class compiled – no syntax errors will
appear at the bottom of the code editor window.
2 Right-click on the
HelloWorld class icon.
3 Select the void main (String[] args) option.
4 Click on the OK button.
The output of your program will appear in the Terminal Window as:
Tech Tweak
If you want to make any changes to a
program, then double-click on the class
icon and make the required changes. After
making the required changes, you need to
compile the program again.
STRUCTURE OF A JAVA PROGRAM
In the previous section, we created a program with a class called HelloWorld, which is defined
using the class keyword. The curly brackets ({ }) mark the beginning and end of the class body.
54 TrackGPT iPRO (V5.0)-VIII

