Remove all java comments

How do you remove comments in Java?

1) Open the java file in which comments are to be removed. 2) Press Ctrl+F if you are using windows, Cmd+F in Mac OS. 3) Select Regular Expressions in the Find Menu. 5) This action will remove all the comments -> Single Line as well as multiple line comments from the java file.

How do you delete a specific line from a text file in Java?

Deleting a text line directly in a file is not possible. We have to read the file into memory, remove the text line and rewrite the edited content….There is no magic to removing lines.

1. Copy the file line by line, without the line you don’t want.
2. Delete the original file.
3. rename the copy as the original file.

How do you delete a record from a text file in Java?

You want to do something like the following:

1. Open the old file for reading.
2. Open a new (temporary) file for writing.
3. Iterate over the lines in the old file (probably using a BufferedReader)
4. When done, close both files.
5. Delete the old file.
6. Rename the temporary file to the name of the original file.

How do I remove multiple lines from a comment in Java?

Open the . java file with comments and open the Search dialog. ( Search -> File Search ) and paste one of the above reg-ex and check the Regular expression tick box on the right side. Now you can search and select “Replace All” to replace it with nothing typed in the second box.

How do you comment multiple lines in Java?

Multi line comments in Java start with /* and end with */. You can comment multiple lines just by placing them between /* and */.

What are the three types of comments in Java?

In Java there are three types of comments:

What are the two types of comments?

Using Two Types of Comments

What is comments and its type?

Comments in Java are the statements that are not executed by the compiler and interpreter. It 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 for a specific time.

What is comment in Java give example?

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 are the types of comments?

Types of Comments in Java

• Single-line Comments. As the name suggests, it is for the beginners and is in a single line Java comments.
• Multi-line Comments.
• Documentation Comments.

How do you write a method comment in Java?

For example, most Javadoc comments for methods include ” @param ” and ” @return ” tags when applicable, to describe the method’s parameters and return value. The ” @param ” tag should be followed by the parameter’s name, and then a description of that parameter.

How do you write a good comment code?

How to comment Code: Primarily, a single “block” comment should be placed at the top of the function (or file) and describe the purpose the code and any algorithms used to accomplish the goal. In-line comments should be used sparingly, only where the code is not “self-documenting”.

How do you comment a method?

Comment every method Your comment should describe what that method does (but not how it does it). We expect you to comment every single method written in your class, even if they seem very simple. Your comments must describe what the method does, but not how it does it.

How do you comment code in Eclipse?

Comments can be added to single lines of code (Ctrl + /) or blocks of code (Ctrl + Shift + /).

How do you comment out code?

You can comment out one or more lines of code in any C/C++ editor view. The leading characters // are added to the beginning of each line when commenting one or more lines of code. You can also block comment multiple lines of code using the characters /* */ .

How do you comment and uncomment multiple lines in eclipse?

CTRL + / –> to comment single line of code. CTRL + / –> the same works to uncomment the same line of code, which is already commented. CTRL + SHIFT + / –> to comment block of code consisting of 3 or more lines of code. CTRL + SHIFT + \ –> to uncomment block of code, which is already commented.

How do you comment a group of lines in eclipse?

For single line comment you can use Ctrl + / and for multiple line comment you can use Ctrl + Shift + / after selecting the lines you want to comment in java editor. On Mac/OS X you can use ⌘ + / to comment out single lines or selected blocks.

How do you comment and uncomment in Codelite?

1. Select both lines use mouse, select “Edit-Comment-Comment Line”. Result: both lines will be commented out.
2. Use mouse cursor to select both lines. Specifically, click from letter A, hold and drag mouse to highlight to letter B. Select “Edit-Comment-Comment Line”.

How do I comment multiple lines in Atmel Studio?

Use the keys Ctrl K , C to comment out the line and Ctrl K , U to uncomment the line.

How do you comment and uncomment in Visual Studio?

Comment Code Block Ctrl+K+C/Ctrl+K+U If you select a block of code and use the key sequence Ctrl+K+C, you’ll comment out the section of code. Ctrl+K+U will uncomment the code.

How do you delete a comment on UFT?

To comment block of statements: Ctrl+M. To uncomment block of statements: Ctrl+Shift+M. To apply “With” to script: Ctrl+W. To remove “With” from script: Ctrl+Shift+W.

How do you comment all lines in UFT?

Replies to This Discussion 2) Select all the lines to be commented and hit “Comments” icon in the QTP Toolbar.

How do you comment text in UFT?

ctrl+m and ctrl+shift+m are the key board short cuts to comment and uncomment a single or bulk statements.

How do I comment in UFT?

HPE UFT/QTP Forums But in QTP vb script editor , select required no. of lines & click on “Comment Block” icon Or press “Control + M” thru keyboard. Hi Sunil, Follow the below way,you can comment the multilines in the Notepad.

How do you remove comments in Java?

How do you remove comments in Java?

1) Open the java file in which comments are to be removed. 2) Press Ctrl+F if you are using windows, Cmd+F in Mac OS. 3) Select Regular Expressions in the Find Menu. 5) This action will remove all the comments -> Single Line as well as multiple line comments from the java file.

How do you remove something from a string in Java?

The first and most commonly used method to remove/replace any substring is the replace() method of Java String class. The first parameter is the substring to be replaced, and the second parameter is the new substring to replace the first parameter.

How do you delete comments in Eclipse?

1. Select the required line(s).
2. Press Ctrl + / The commenting formatting will be removed from the code.

How do I remove numbers from a string in Java?

You can use: firstname1 = firstname1. replaceAll(“9”,””); This will remove all numeric values from String firstName1 .

How do you remove comments from code?

To comment or remove comments from a block of code:

1. In the C/C++ editor, highlight a section of code to comment or remove comments. For a single line, position your cursor anywhere on that line.
2. Right-click and select Comment or Uncomment.

How do you comment multiple lines in Java?

Multi line comments in Java start with /* and end with */. You can comment multiple lines just by placing them between /* and */.

How do you remove all occurrences of a character from a string in Java?

str = str. replaceAll(“X,””); This should give you the desired answer. This solution takes into acount that the resulting String – in difference to replace() – never becomes larger than the starting String when removing characters.

How do I delete multiple comments in Eclipse?

How do I remove a specific number from a string?

1. Get the String to remove all the digit.
2. Convert the given string into a character array.
3. Initialize an empty string that stores the result.
4. Traverse the character array from start to end.
5. Check if the specified character is not digit then add this character into the result variable.
6. Now, print the result.

How do you delete a digit in a number?

To delete nth digit from starting:

1. Get the number and the nth digit to be deleted.
2. Count the number of digits.
3. Loop number of digits time by counting it with a variable i.
4. If the i is equal to (number of digits – i), then skip, else add the ith digit as [ new_number = (new_number * 10) + ith_digit ].

How to remove comments from string stack overflow?

I made an open source library (on GitHub) for this purpose , its called CommentRemover you can remove single line and multiple line Java Comments. It supports remove or NOT remove TODO’s. Also it supports JavaScript , HTML , CSS , Properties , JSP and XML Comments too. Little code snippet how to use it (There is 2 type usage):

How to remove comments from a string in Rosetta?

You are encouraged to solve this task according to the task description, using any language you may know. The task is to remove text that follow any of a set of comment markers, (in these examples either a hash or a semicolon) from a string or input line.

How to remove comments outside of a line?

For example, source = “string s = “/* Not a comment. */”;” will not be a test case. Also, nothing else such as defines or macros will interfere with the comments. It is guaranteed that every open block comment will eventually be closed, so “/*” outside of a line or block comment always starts a new comment.

How to remove a character from a string in Java?

Notice that replaceAll and replaceFirst methods first argument is a regular expression, we can use it to remove a pattern from string. Below code snippet will remove all small case letters from the string. There is no method to replace or remove last character from string, but we can do it using string substring method.

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Remove All Comments in Java Files

If you are working on a Java project, there might be a need to remove all the comments from your Java files before sharing or publishing the code. Comments are lines that are ignored by the compiler and are used to explain the code or to make it more readable. However, when sharing the code, comments can be a security risk as they can reveal important information about the code.

Here are two methods to remove all comments in Java files:

Method 1: Using Regular Expressions

Regular expressions can be used to search for and remove all comments in Java files. Here’s an example Java code that shows how to remove comments using regular expressions:

import java.io.BufferedReader; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.util.regex.Matcher; import java.util.regex.Pattern; public class RemoveComments < public static void main(String[] args) throws IOException < BufferedReader reader = new BufferedReader(new FileReader("input.java")); FileWriter writer = new FileWriter("output.java"); String line = reader.readLine(); while (line != null) < Pattern pattern = Pattern.compile("(?s)/\\*.*?\\*/|//.*"); Matcher matcher = pattern.matcher(line); line = matcher.replaceAll(""); writer.write(line + "\n"); line = reader.readLine(); >reader.close(); writer.close(); > > 

This code uses a regular expression pattern to search for both single-line and multi-line comments, and then replaces them with an empty string.

Method 2: Using Java Parser

Another method to remove comments is by using the Java Parser library. The Java Parser library is a tool that allows you to parse and manipulate Java code. Here’s an example Java code that shows how to remove comments using the Java Parser library:

import com.github.javaparser.JavaParser; import com.github.javaparser.ast.CompilationUnit; import com.github.javaparser.ast.comments.Comment; import com.github.javaparser.ast.visitor.VoidVisitorAdapter; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileWriter; import java.io.IOException; public class RemoveComments < public static void main(String[] args) throws FileNotFoundException < FileInputStream in = new FileInputStream("input.java"); CompilationUnit cu = JavaParser.parse(in); new VoidVisitorAdapter() < @Override public void visit(Comment n, Void arg) < super.visit(n, arg); n.remove(); >>.visit(cu, null); try < FileWriter output = new FileWriter("output.java"); output.write(cu.toString()); output.close(); >catch (IOException e) < e.printStackTrace(); >> > 

This code uses the Java Parser library to parse the Java code and then removes all comments using the `Comment` class.

These are two methods to remove all comments in Java files. Choose the one that suits your needs best and use it to remove comments from your Java files before sharing them with others.

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