How do I use Java to sort surnames in alphabetical order from file to file?
- by user577939
I have written this code and don't know how to sort surnames in alphabetical order from my file to another file.
import java.io.*;
import java.util.*;
class Asmuo {
String pavarde;
String vardas;
long buvLaikas;
int atv1;
int atv2;
int atv3;
}
class Irasas {
Asmuo duom;
Irasas kitas;
}
class Sarasas {
private Irasas p;
Sarasas() {
p = null;
}
Irasas itrauktiElementa(String pv, String v, long laikas, int d0, int d1,
int d2) {
String pvrd, vrd;
int data0;
int data1;
int data2;
long lks;
lks = laikas;
pvrd = pv;
vrd = v;
data0 = d0;
data1 = d1;
data2 = d2;
Irasas r = new Irasas();
r.duom = new Asmuo();
uzpildymasDuomenimis(r, pvrd, vrd, lks, d0, d1, d2);
r.kitas = p;
p = r;
return r;
}
void uzpildymasDuomenimis(Irasas r, String pv, String v, long laik, int d0,
int d1, int d2) {
r.duom.pavarde = pv;
r.duom.vardas = v;
r.duom.atv1 = d0;
r.duom.buvLaikas = laik;
r.duom.atv2 = d1;
r.duom.atv3 = d2;
}
void spausdinti() {
Irasas d = p;
int i = 0;
try {
FileWriter fstream = new FileWriter("rez.txt");
BufferedWriter rez = new BufferedWriter(fstream);
while (d != null) {
System.out.println(d.duom.pavarde + " " + d.duom.vardas + " "
+ d.duom.buvLaikas + " " + d.duom.atv1 + " "
+ d.duom.atv2 + " " + d.duom.atv3);
rez.write(d.duom.pavarde + " " + d.duom.vardas + " "
+ d.duom.buvLaikas + " " + d.duom.atv1 + " "
+ d.duom.atv2 + " " + d.duom.atv3 + "\n");
d = d.kitas;
i++;
}
rez.close();
} catch (Exception e) {
System.err.println("Error: " + e.getMessage());
}
}
}
public class Gyventojai {
public static void main(String args[]) {
Sarasas sar = new Sarasas();
Calendar atv = Calendar.getInstance();
Calendar isv = Calendar.getInstance();
try {
FileInputStream fstream = new FileInputStream("duom.txt");
DataInputStream in = new DataInputStream(fstream);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
String eil;
while ((eil = br.readLine()) != null) {
String[] cells = eil.split(" ");
String pvrd = cells[0];
String vrd = cells[1];
atv.set(Integer.parseInt(cells[2]), Integer.parseInt(cells[3]),
Integer.parseInt(cells[4]));
isv.set(Integer.parseInt(cells[5]), Integer.parseInt(cells[6]),
Integer.parseInt(cells[7]));
long laik = (isv.getTimeInMillis() - atv.getTimeInMillis())
/ (24 * 60 * 60 * 1000);
int d0 = Integer.parseInt(cells[2]);
int d1 = Integer.parseInt(cells[3]);
int d2 = Integer.parseInt(cells[4]);
sar.itrauktiElementa(pvrd, vrd, laik, d0, d1, d2);
}
in.close();
} catch (Exception e) {
System.err.println("Error: " + e.getMessage());
}
sar.spausdinti();
}
}
