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Java Comments

Java comments are statements that are not executed by the compiler and are used to provide information about the code. They are used to explain the code to the reader or to disable a part of the code temporarily. Java comments are ignored by the compiler and do not affect the execution of the program.

Types of Java Comments

There are three types of Java comments:

  • Single-line comments
  • Multi-line comments
  • Documentation comments

Single-line comments

Single-line comments start with two forward slashes (//) and continue until the end of the line. They are used to provide short explanations or to disable a single line of code. For example:

// This is a single-line comment
	int x = 5; // This line of code is disabled

Multi-line comments

Multi-line comments start with /* and end with */. They are used to provide longer explanations or to disable multiple lines of code. For example:

/* This is a multi-line comment
   It can span multiple lines
   This line of code is disabled */
   int y = 10; // This line of code is enabled

Documentation comments

Documentation comments start with /** and end with */. They are used to generate documentation for the code using tools like Javadoc. For example:

/**
   * This method adds two numbers
   * @param a the first number
   * @param b the second number
   * @return the sum of a and b
   */
   public int add(int a, int b) {
       return a   b;
   }

Best Practices for Java Comments

Here are some best practices for using Java comments:

  • Use comments to explain the code, not to state the obvious
  • Use clear and concise language
  • Update comments when the code changes
  • Avoid commenting out code, use version control instead
  • Use documentation comments for public methods and classes

Conclusion

Java comments are an important part of writing clear and understandable code. They provide information about the code to the reader and can be used to disable parts of the code temporarily. By following best practices for using Java comments, you can make your code more readable and maintainable.

References

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