Uses of Comments in Java
- Comment lines can be used to explain what a certain variable holds, the use of a method/function, class, and many more.
- It can be used to avoid errors while testing other parts of the program.
- Comments can also be used to mention other details.
- This makes the program more readable.
What are the different types of comments in Java?
Types of Java Comments. There are three types of comments in Java. Single Line Comment; Multi Line Comment; Documentation Comment; 1) Java Single Line Comment. The single-line comment is used to comment only one line of the code. It is the widely used and easiest way of commenting the statements. Single line comments starts with two forward ...
How to create JButton in Java?
JButton basic tutorial and examples
- Creating a JButton object. Here the icon file start.gif is placed under images directory which is relative to the program. ...
- Adding the button to a container
- Adding event listener for JButton. ...
- Setting mnemonic and hotkey for JButton. ...
- Setting a JButton as the default button. ...
- Customizing JButton’s appearance
- JButton demo program. ...
How to activate Java in the browser?
To enable/disable Java in the Safari browser:
- Select Safari -> Preferences from the menu toolbar.
- In the preferences, window click on the Security icon.
- Make sure the Enable Java checkbox is checked if you want Java enabled or unchecked if you want it disabled.
- Close the preferences window and the change will be saved.
How to use a for statement in Java?
- Control falls into the for loop. Initialization is done
- The flow jumps to Condition
- Condition is tested. ...
- The statements inside the body of the loop get executed.
- The flow goes to the Updation
- Updation takes place and the flow goes to Step 3 again
- The for loop has ended and the flow has gone outside.
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What are the types of comments in Java?
Java programs can have two kinds of comments: implementation comments and documentation comments.
What are the three comments in Java?
In Java there are three types of comments: Single-line comments. Multi-line comments. Documentation comments.
What are the comments in Java with example?
In computer programming, comments are a portion of the program that are completely ignored by Java compilers. They are mainly used to help programmers to understand the code. For example, // declare and initialize two variables int a =1; int b = 3; // print the output System.
What are the types of comments?
The Four Types of CommentsThe Wise Comment. The wise comment is one that shares knowledge. ... The Wicked Comment. ... The Ignorant Comment. ... The One Who Didn't Read. ... Coda.
What is /* in Java?
/** and /* in Java comments All characters available inside any comment are ignored by Java compiler. /** is known as documentation comments. It is used by Javadoc tool while creating the documentation for the program code. /* is used for multi-line comments.
What are the two types of comments?
Single line comment.Multi-line comment.
What is a comment code?
Often cited as one of the most useful and least used programming conventions, a comment is a text note added to source code to provide explanatory information, usually about the function of the code. Comments are usually helpful to someone maintaining or enhancing your code when you are no longer around to answer ...
How do you comment a class?
By convention, in Java, documentation comments are set inside the comment delimiters /** ... */ with one comment per class, interface, or member. The comment should appear right before the declaration of the class, interface or member and each line of the comment should begin with a "*".
Why comments are used in program?
Comments are text notes added to the program to provide explanatory information about the source code. They are used in a programming language to document the program and remind programmers of what tricky things they just did with the code and also helps the later generation for understanding and maintenance of code.
What is comment in OOP?
Single-line comments start with two forward slashes ( // ). Any text between // and the end of the line is ignored by the compiler (will not be executed).
What is a block comment in Java?
We will discuss block comments in Java in this tutorial. The block comment is used to comment on many lines of code at the same time. We use /* and */ to insert block comments. Block comments can extend to many lines or be inserted within a code statement.
What is void in Java?
The void keyword in Java denotes that a method does not have a return type. However, even though a constructor method can never have a return type, it does not have the void keyword in its declaration.
What are block comments Java?
Comment System in PHP with Source Code Free Download 2021 | PHP Projects with Source Code. We will discuss block comments in Java in this tutorial. The block comment is used to comment on many lines of code at the same time. We use /* and */ to insert block comments.
What is a comment code?
Often cited as one of the most useful and least used programming conventions, a comment is a text note added to source code to provide explanatory information, usually about the function of the code. Comments are usually helpful to someone maintaining or enhancing your code when you are no longer around to answer ...
What is multi line comment in Java?
Multi line comments in Java start with /* and end with */. You can comment multiple lines just by placing them between /* and */. /* Hello this is the way to write multi line comments in Java */
What is a multi line comments?
Multi-line comments have one or more lines of narrative within a set of comment delimiters. The /* delimiter marks the beginning of the comment, and the */ marks the end. You can have your comment span multiple lines and anything between those delimiters is considered a comment.
Why do we use comments in Java?
Comments can be used to explain Java code, and to make it more readable. It can also be used to prevent execution when testing alternative code .
What does a multiline comment start with?
Multi-line comments start with /* and ends with */.
What is ignored in Java?
Any text between // and the end of the line is ignored by Java (will not be executed).
What is a comment in Java?
The Java comments are the statements that are not executed by the compiler and interpreter. The comments can be used to provide information or explanation about the variable, method, class or any statement. It can also be used to hide program code.
How many types of comments are there in Java?
There are three types of comments in Java.
What is a multi line comment?
The multi-line comment is used to comment multiple lines of code. It can be used to explain a complex code snippet or to comment multiple lines of code at a time (as it will be difficult to use single-line comments there).
Why do we need documentation comments?
Documentation comments are usually used to write large programs for a project or software application as it helps to create documentation API. These APIs are needed for reference, i.e., which classes, methods, arguments, etc., are used in the code.
What is a comment in a statement?
The comments can be used to provide information or explanation about the variable, method, class , or any statement.
Do Java comments have to be ASCII?
Ans: As we know, Java comments are not executed by the compiler or interpreter, however, before the lexical transformation of code in compiler, contents of the code are encoded into ASCII in order to make the processing easy.
What are comments in Java?
Comments in Java are often are non-executable statements, used to understand the code better and to make it more readable. As mentioned above, it can also be helpful in preventing code execution when testing an alternative code. In short, Java comments are non-executable statements, used to understand Code better.
How many types of comments are there in Java?
Basically, there are three types of comments in Java. They are as follows:
What is a single line comment in Java?
Single-line comments start with two forward slashes (//). Any text between // and the end of the line is ignored by Java implies it will not be executed. Now, let’s take a small example to know how single-line comments can be used.
What is a comment in Java?
In computer programming, comments are a portion of the program that are completely ignored by Java compilers. They are mainly used to help programmers to understand the code. For example,
How many types of comments are there in Java?
In Java, there are two types of comments:
What is the end of line comment in Java?
The Java compiler ignores everything from // to the end of line. Hence, it is also known as End of Line comment.
Should you use comments in code?
One thing you should always consider that comments shouldn't be the substitute for a way to explain poorly written code in English. You should always write well structured and self explaining code. And, then use comments. Some believe that code should be self-describing and comments should be rarely used.
Should code be self-describing?
Some believe that code should be self-describing and comments should be rarely used. However, in my personal opinion, there is nothing wrong with using comments. We can use comments to explain complex algorithms, regex or scenarios where we have to choose one technique among different technique to solve problems.
What is a comment in programming?
– Programmers give comments to describe a particular piece of code or a particular logic to help others understand.#N#– Comments are also used to describe an algorithm of a method or a short summary of the code.
What is a comment in a code?
– Comments contain information about the author of the initial version of the program, date of creation, compatible environments on which the code can run, IDE information, people who have modified the program so far.#N#– Copyright notices can be written as comments inside the source code. This information helps in maintenance.
What Are Comments in Java?
Types of Comments
- Basically, there are three types of comments in Java. They are as follows: 1. Single-line comments 2. Multi-line comments 3. Documentation comments Now let’s get into the details of these comments.
Single-Line Comments
- This type of comment is mainly used for describing the code functionality. It is the easiest typed comments. Single-line comments start with two forward slashes (//). Any text between // and the end of the line is ignored by Javaimplies it will not be executed. Now, let’s take a small example to know how single-line comments can be used. You can see in the above example that I have use…
Multi-Line Comments
- To describe a full method in a code or a complex snippet single line comments can be tedious to write since we have to give ‘//’ at every line. So to overcome this multi-line comments can be used. Multi-line comments start with /* and end with */. Any text between /* and */ will be ignored by Java. It is used to comment multiple lines of code. Now, let’s take a small example to know h…