Java ZipEntry getLastModifiedTime() function with examples


The getLastModifiedTime() function is a part of java.util.zip package. The function returns the Last Modified Time of a specific ZipEntry .
The function returns FileTime Object, which represents the Last Modified time of the ZipEntry (when the file was last Modified) or null if last Modified time is not specified.
If the ZipEntry is read from ZIP file or ZIP file formatted input stream then this is the last modified time else last modification time is read from the entry’s date and time fields.
Function Signature :

public FileTime getLastModifiedTime()

Syntax :

zip_entry.getLastModifiedTime();

Parameters :No parameter is required for this function.
Return value :The function returns FileTime Object, which represents the Last Modified time of the ZipEntry .
Exceptions :The function does not throw any exception.



Below programs illustrates the use of getLastModifiedTime() function

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

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// Java program to demonstrate the
// use of getLastModifiedTime() function
  
import java.util.zip.*;
import java.util.Enumeration;
import java.util.*;
import java.io.*;
import java.nio.file.attribute.*;
  
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 LastModifiedTime
            // using the getLastModifiedTime()
            // function
            FileTime input = entry.getLastModifiedTime();
  
            // Display the LastModifiedTime
            System.out.println("LastModifiedTime : "
                               + input.toString());
        }
        catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }
}

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Output:

LastModifiedTime : 2019-02-24T18:42:15.858576Z

Example 2: We will create a file named zip_file and get the zip file entry using getEntry() function and then get the LastModifiedTime of the specified ZipEntry.”file.zip” is a zip file present in f: directory. we will take a “.cpp” file as ZipEntry

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// Java program to demonstrate the
// use of getLastModifiedTime() function
  
import java.util.zip.*;
import java.util.Enumeration;
import java.util.*;
import java.io.*;
import java.nio.file.attribute.*;
  
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("file1.cpp");
  
            // Get the LastModifiedTime
            // using the getLastModifiedTime()
            // function
            FileTime input = entry.getLastModifiedTime();
  
            // Display the LastModifiedTime
            System.out.println("LastModifiedTime : "
                               + input.toString());
        }
        catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }
}

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Output:

LastModifiedTime : 2018-12-07T13:11:25.38081Z

Reference: https://docs.oracle.com/javase/8/docs/api/java/util/zip/ZipEntry.html#getLastModifiedTime–



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Second year Department of Information Technology Jadavpur University

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