Java ZipEntry getComment() function with examples


The getComment() function is a part of java.util.zip package. The function returns the Comment of a specific ZipEntry .
Function Signature :

public String getComment()

Syntax :

zip_entry.getComment();

Parameters :No parameter is required for this function.
Return value :The function returns String object, the comment of this ZipEntry.
Exceptions :The function does not throw any exception.



Below programs illustrates the use of getComment() function

Example 1: We will create a file named zip_file and get the zip file entry using getEntry() function and then get the comment of the specified ZipEntry.”file.zip” is a zip file present in f: directory.

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// Java program to demonstrate the
// use of getComment() function
  
import java.util.zip.*;
import java.util.Enumeration;
import java.util.*;
import java.io.*;
  
public class solution {
    public static void main(String args[])
    {
        try {
            // Create a Zip File
            ZipFile zip_file = new ZipFile("f:\\file1.zip");
  
            // get the Zip Entry using
            // the getEntry() function
            ZipEntry entry = zip_file.getEntry("file.zip");
  
            // get the Comment
            // using the getComment()
            // function
            String input = entry.getComment();
  
            // Display the comment
            System.out.println("Comment : " + input);
        }
        catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }
}

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Output:

Comment : This is a Zip Entry comment

Example 2: We will create a file named zip_file and get the zip file entry using getEntry() function and then get the comment of the specified ZipEntry.”file.zip” is a zip file present in f: directory.
When no Comment is set.

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// Java program to demonstrate the
// use of getComment() function
  
import java.util.zip.*;
import java.util.Enumeration;
import java.util.*;
import java.io.*;
  
public class solution {
    public static void main(String args[])
    {
        try {
            // Create a Zip File
            ZipFile zip_file = new ZipFile("f:\\file1.zip");
  
            // get the Zip Entry using
            // the getEntry() function
            ZipEntry entry = zip_file.getEntry("file.zip");
  
            // get the Comment
            // using the getComment()
            // function
            String input = entry.getComment();
  
            // Display the comment
            System.out.println("Comment : " + input);
        }
        catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }
}

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Output:

Comment : null

Reference: https://docs.oracle.com/javase/9/docs/api/java/util/zip/ZipEntry.html#getComment–



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Second year Department of Information Technology Jadavpur University

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