The following routines will accomplish the followings.

• create a directory if does not exits, if you delete this myfirst directory and try that

I removed the directory and run the routine

\

Note the myfile is created

Zip file is created

import java.io.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import java.util.zip.ZipFile;// needed ZipFile
import java.util.Enumeration;//needed enumeration

//javac Test_ZipEntry.java
//java -classpath . Test_ZipEntry
public class Test_ZipEntry {

public static void main(String[] args) throws Exception
{

//System.out.println(new File("c:/myjava/File_Class/myfirst").mkdir());
String str = "c:/myjava/File_Class/myfirst";
String fpath = "c:/myjava/File_Class/mynew.txt";
String fileunpack = "c:/myjava/File_Class/myfirst/mynew.txt";
String strzip = "c:/myjava/File_Class/myfirst/myfirst.zip";
boolean b1;
File dir = new File(str);
// if directory exits delete if does not then create
if(! dir.isDirectory())
{
new File("c:/myjava/File_Class/myfirst").mkdir();
System.out.println("directory "+ dir.getName()+" Created");}
else {System.out.println("directory exists");}
byte[] data =new byte[2048]; int bytecount=0;
ZipOutputStream out = new ZipOutputStream(new FileOutputStream("c:/myjava/File_Class/myfirst/myfirst.zip"));
BufferedInputStream in = new BufferedInputStream(new FileInputStream(fpath));

try {
ZipEntry entry = new ZipEntry(fileunpack);
System.out.println("Compressing " + fpath);
out.putNextEntry(entry);
while((bytecount = in.read(data, 0,2048))!=-1)
{
out.write(data,0,bytecount);
}

} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
finally {
System.out.println("Compressing " + bytecount);
in.close();
out.close();
}

Can_Unzip cu = new Can_Unzip();
cu.method_1(strzip);
}
}
class Can_Unzip
{
public void method_1(String str)throws Exception
{
ZipFile zf = new ZipFile(str);
Enumeration e = zf.entries();
int len=0; byte[] buffer = new byte[2048];
while (e.hasMoreElements()) {
ZipEntry entry = (ZipEntry)e.nextElement();
if(entry.isDirectory()){ System.out.println("Extracting" + entry.getName());
(new File(entry.getName())).mkdir(); continue;
}
InputStream in = zf.getInputStream(entry);
BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(entry.getName()));
while((len = in.read(buffer))>=0)
{
out.write(buffer, 0, len);
}
in.close();
out.close();
}
zf.close();
}
}