java - Loading from object file -

i want load information object file array of type "song"

public class song {  string name;  string singer;   public void setname(string name) {     this.name = name; }    public void setsinger(string singer) {      this.singer = singer;   }    public string getname() {       return name; }  public string getsinger() {      return  singer;  }   @override public string tostring() {     return   getname() + "\t" + getsinger() + "\n"; } 

and how try read did not work

private void loadfromobj(file f) {       objectinputstream ois = null;     fileinputstream fis = null;      try {         song[] s = new song[100];         object obj;          fis = new fileinputstream(f);         ois = new objectinputstream(fis);          while ((obj = ois.readobject()) != null) {              (int = 0; < s.length; i++) {                  s[i] = (song) obj;              }         }          ois.close();         fis.close();          // refreshtable(s);      } catch (ioexception e) {         e.printstacktrace();     } catch (classnotfoundexception e) {         e.printstacktrace();     } } 

the object file contain lines each line has song name , artist name separated space "\t"

this how write information object file

private void writetoobj(file f, song[] s) {     song     // array write file      objectoutputstream oos = null;     fileoutputstream fos = null;      try {         fos = new fileoutputstream(f);         oos = new objectoutputstream(fos);          (int = 0; < s.length; i++) {              oos.writeobject(s[i].tostring());              oos.writeobject(null);         }      } catch (ioexception e) {         e.printstacktrace();     }      {         try {             oos.close();             fos.close();         } catch (ioexception e) {             e.printstacktrace();         }     }  } 

add "implements java.io.serializable" after "public class song".

for use objectinputstream class need implements java.io.serializable or java.io.externalizable , file must create objectoutputstream. parse text file object use

byte[] encoded = files.readallbytes(paths.get(path)); string file = new string(encoded, encoding); 

and parse string object:

string[] vars = file.split("\t"); song song = new song(); song.setname(vars[0]); song.setartist(vars[1]);