JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Program: How to read zip files entries or file name list?


Description:

Below example shows how to get list of file names from a zip file.


Code:
package com.java2novice.zip;

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class MyZipFileList {

public void printFileList(String filePath){
		
		FileInputStream fis = null;
		ZipInputStream zipIs = null;
		ZipEntry zEntry = null;
		try {
			fis = new FileInputStream(filePath);
			zipIs = new ZipInputStream(new BufferedInputStream(fis));
			while((zEntry = zipIs.getNextEntry()) != null){
				System.out.println(zEntry.getName());
			}
			zipIs.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	public static void main(String a[]){
		
		MyZipFileList mfe = new MyZipFileList();
		mfe.printFileList("C:/Archive.zip");
	}
}

Output:
config_copy.txt
mac-addr_copy.txt
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List of all java.util.zip class sample examples:

  1. How to compress byte array in java?
  2. How to decompress byte array in java?
  3. How to zip a single file?
  4. How to zip multiple files?
  5. How to read zip files entries or file name list?
  6. How to unzip files in java?
  7. How to generate checksum value for for a file in java?
  8. How to compress and store objects using zip utility?
  9. How to decompress the compressed objects using zip utility?
  10. How to zip a file using ZipFile class?
  11. How to compress a file in GZip format?
  12. How to uncompress a file from GZip format?
Knowledge Centre
When to use LinkedList or ArrayList?
Accessing elements are faster with ArrayList, because it is index based. But accessing is difficult with LinkedList. It is slow access. This is to access any element, you need to navigate through the elements one by one. But insertion and deletion is much faster with LinkedList, because if you know the node, just change the pointers before or after nodes. Insertion and deletion is slow with ArrayList, this is because, during these operations ArrayList need to adjust the indexes according to deletion or insetion if you are performing on middle indexes. Means, an ArrayList having 10 elements, if you are inserting at index 5, then you need to shift the indexes above 5 to one more.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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