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Questions and Answers
What two things does every Java console application need?
A class and a main method
What does void mean in a method declaration?
It indicates that the method does not return a value.
What do the two forward slashes (//) represent in Java?
They indicate a single-line comment.
Everything from the ___ through the __________________________________ is ignored by the compiler.
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Everything from the opening _____ through the closing _____ is ignored by the compiler.
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What is the convention for header comments for the class and methods in Java?
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What is the main purpose of the Java source code compiler?
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In Java, compilation produces machine code directly understood by the computer.
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What is the name of the Java program that compiles source code?
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What does it mean for code to have a minimal structure in Java?
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Which of the following describes the process of running a Java program?
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Study Notes
Java Programs
- A simple Java program can be created using source code written in readable English-like code, saved as a
.javafile. - Compiling the source code with the
javaccompiler creates byte code, stored in a.classfile. - The Java Virtual Machine (JVM) executes the
.classbyte code. - Java programs require a
public classdefinition and amainmethod. - Braces,
{}, mark the beginning and end of blocks of code. - The keyword
voidindicates that a method does not return a value. - Comments, using two forward slashes
//, are ignored by the compiler. - Header comments for classes and methods are typically written with a format similar to
@author first-name last-name. - All code should be indented at least 2 spaces per level.
- Statements within loops, if, or else clauses, are indented and placed on a new line.
- Braces can be aligned vertically or on the same line as the construct they define.
- Single line comments should be used to explain specific code elements.
- Methods should strive to be limited to 25 statements or less.
- Line length should be limited to 80 characters for enhanced readability.
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Description
This quiz covers fundamental concepts of Java programming, including code structure, compiling, and execution through the Java Virtual Machine. Topics include the use of public class definitions, main methods, and code formatting standards within Java. Test your knowledge on writing and understanding simple Java programs.
