You can use a zip file system to look into the contents of a .zip file. Call FileSystem zipfs = FileSystems.newFileSystem(path, null);

where path is the Path to the zip file. Then call zipfs.getPath(p) to get any Path inside the zip file, as if it were a path in a regular directory. You can read, copy, or move it. To inspect all files and directory trees, call Files.walk(zipfs.getPath("/")).

Write a program that opens a zip file and shows the names and the first ten lines of all files in it.