zip,move and size of file which is in a server path using java -

i have file in server, want create 3 java apis, below 3 operations in dependently.

1. get file size
2. move file different file name different server location
3. zip file

in existing code executing linux commands perform operations, unfortunately, linux commands not getting executed, due server/set issue, forced use java commands.(we use jdk 1.6)

i not java developer. have gone through of answered questions, not explaining file in server path. appreciated.

to file size in bytes:

file file = new file("filename.txt"); long filesize = file.length(); 

to move file must first copy , delete original:

inputstream  instream = null; outputstream outstream = null;      try {         file fromfile = new file("startfolder\\filename.txt");         file tofile   = new file("endfolder\\filename.txt");          instream  = new fileinputstream(fromfile);         outstream = new fileoutputstream(tofile);          byte[] buffer = new byte[1024];          int length;         while ((length = instream.read(buffer)) > 0){             outstream.write(buffer, 0, length);         }          instream.close();         outstream.close();          fromfile.delete();      } catch(ioexception e) {         e.printstacktrace();     } 

to zip file:

byte[] buffer = new byte[1024];  try {  fileinputstream filetozip = new fileinputstream("filename.txt"); fileoutputstream fileoutputstream = new fileoutputstream("filename.zip"); zipoutputstream zipoutputstream = new zipoutputstream(fileoutputstream);  zipentry zipentry= new zipentry("filename.txt"); zipoutputstream.putnextentry(zipentry);  int len; while ((len = filetozip.read(buffer)) > 0) {     zipoutputstream.write(buffer, 0, len); }  filetozip.close(); zipoutputstream.closeentry(); zipoutputstream.close();  } catch(ioexception e) {    e.printstacktrace(); } 

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