Create a zip file : ZipFile « File « Java Tutorial

1. Java Tutorial
2. File
3. ZipFile

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class Main {
  public static void main(String[] args) throws Exception {
    FileInputStream inStream = new FileInputStream("test.txt");
    ZipOutputStream outStream = new ZipOutputStream(new FileOutputStream("compressed.zip"));

    outStream.putNextEntry(new ZipEntry("test.txt"));

    byte[] buffer = new byte[1024];
    int bytesRead;

    while ((bytesRead = inStream.read(buffer)) > 0) {
      outStream.write(buffer, 0, bytesRead);
    }

    outStream.closeEntry();
    outStream.close();
    inStream.close();
  }

}