import net.lingala.zip4j.io.inputstream.ZipInputStream;
import net.lingala.zip4j.model.LocalFileHeader;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.File;
import java.io.IOException;

public class SampleClass{

public static void main(String[] args)
throws IOException{
LocalFileHeader lfh = null;
byte[] buffer = new byte[3072];

FileInputStream fis =
new FileInputStream(new File("myzip.zip"));
try(ZipInputStream zis =
new ZipInputStream(fis, "password".toCharArray())){

while((lfh = zis.getNextEntry()) != null){
File extractedFile = new File(lfh.getFileName());

try(FileOutputStream fos = new
FileOutputStream("extracted/"+extractedFile)){

int len = 0;
while((len = zis.read(buffer)) != -1)
fos.write(buffer);
}
}
}
}
}