写入数据后如何打开txt文件?
How to make txt file opened up after data have been written to it?
import java.io.*;
import java.util.ArrayList;
import java.util.StringTokenizer;
public class OutputToFile {
public static void main(String[] args) {
ArrayList<Flight> flightList = new ArrayList<Flight>();
try {
BufferedReader filein = new BufferedReader(new FileReader(new File("flight.dat")));
PrintWriter fileout = new PrintWriter(new FileWriter("output.txt"));
String line;
String from = null;
String to = null;
String flightNo = null;
String date = null;
String departure = null;
if (filein != null) { // not null if file exist
while ((line = filein.readLine()) != null) { //has more line to read
StringTokenizer st = new StringTokenizer(line);
while (st.hasMoreTokens()) {
from = st.nextToken();
to = st.nextToken();
flightNo = st.nextToken();
date = st.nextToken();
departure = st.nextToken();
}
Flight f = new Flight(from, to, flightNo, date, departure);
flightList.add(f);
}
}
fileout.println("Total number of flights :"+ flightList.size());
fileout.println("== Flight Plan ==");
for (Flight f: flightList) {
fileout.println();
fileout.println("From : "+ f.getFrom());
fileout.println("To : "+ f.getTo());
fileout.println("Flight Number : "+ f.getFlightNum());
fileout.println("Date : "+ f.getDate());
fileout.println("Departure Time : "+ f.getDepartureTime());
}
filein.close();
fileout.close();
} catch (IOException e) {
System.out.println(e);
}
}
}
因此,此程序从flight.dat读取数据并将数据写入output.txt。之后,我必须手动打开“output.txt”文件来检查数据是否已写入。有没有办法让 output.txt 文件在java 程序?如果有这样的方法,是否也可以根据需要 运行 任何文件(可能是 mp3 文件)?还有一件事,对我的代码有什么建议可以让它变得更好吗?谢谢你们的帮助。 :)
查看https://docs.oracle.com/javase/8/docs/api/java/awt/Desktop.html
在您的特定情况下,这可能会奏效:
Desktop.getDesktop().open(new File("output.txt"));
import java.io.*;
import java.util.ArrayList;
import java.util.StringTokenizer;
public class OutputToFile {
public static void main(String[] args) {
ArrayList<Flight> flightList = new ArrayList<Flight>();
try {
BufferedReader filein = new BufferedReader(new FileReader(new File("flight.dat")));
PrintWriter fileout = new PrintWriter(new FileWriter("output.txt"));
String line;
String from = null;
String to = null;
String flightNo = null;
String date = null;
String departure = null;
if (filein != null) { // not null if file exist
while ((line = filein.readLine()) != null) { //has more line to read
StringTokenizer st = new StringTokenizer(line);
while (st.hasMoreTokens()) {
from = st.nextToken();
to = st.nextToken();
flightNo = st.nextToken();
date = st.nextToken();
departure = st.nextToken();
}
Flight f = new Flight(from, to, flightNo, date, departure);
flightList.add(f);
}
}
fileout.println("Total number of flights :"+ flightList.size());
fileout.println("== Flight Plan ==");
for (Flight f: flightList) {
fileout.println();
fileout.println("From : "+ f.getFrom());
fileout.println("To : "+ f.getTo());
fileout.println("Flight Number : "+ f.getFlightNum());
fileout.println("Date : "+ f.getDate());
fileout.println("Departure Time : "+ f.getDepartureTime());
}
filein.close();
fileout.close();
} catch (IOException e) {
System.out.println(e);
}
}
}
因此,此程序从flight.dat读取数据并将数据写入output.txt。之后,我必须手动打开“output.txt”文件来检查数据是否已写入。有没有办法让 output.txt 文件在java 程序?如果有这样的方法,是否也可以根据需要 运行 任何文件(可能是 mp3 文件)?还有一件事,对我的代码有什么建议可以让它变得更好吗?谢谢你们的帮助。 :)
查看https://docs.oracle.com/javase/8/docs/api/java/awt/Desktop.html
在您的特定情况下,这可能会奏效:
Desktop.getDesktop().open(new File("output.txt"));