我试图让我的程序有一个恢复功能,它存储所有保存的内容从以前的示例时,用户按下e,然后当程序重新运行,从该文件读取恢复以前的状态(读/写到) ArrayList
). 但是,当我尝试写入文件时,文件确实保存了内容,但当重新启动时,文件被清除。我正在使用 PrintWriter
并附加到我的当前文件进行保存。
这是我的write to file类:
public class fileWrite {
/* Init writing file PrintWriter objects */
PrintWriter outFile;
PrintWriter writeUserInput;
{
/* init writer to store all footballclubs current in the league */
try {
outFile = new PrintWriter("addcontents.txt");
} catch(FileNotFoundException e) {
System.out.println("File failed to be created to save this instance.");
}
}
public fileWrite() {
}
/* Append a String to the file */
public void appendString(String s) {
writeUserInput.append(s + "\n");
writeUserInput.flush();
}
/* Append an Int to the file */
public void appendInt(int number) {
writeUserInput.print(number + "\n");
writeUserInput.flush();
}
/* Loop through clubs array and save all information regarding clubs inside file */
public void storeClubs(ArrayList < FootballClub > footballClubsList) {
for (FootballClub x: footballClubsList) {
outFile.println(x.toString());
}
}
/* Close the file writing object */
public void closeFile() {
outFile.close();
}
}
1条答案
按热度按时间f45qwnt81#
我添加了filewriter并将appending设置为false,以确保旧内容不会被重新写入,并且只添加了新内容(复制数据)。另外,现在关闭右printwriter对象,以前没有