1
我有此代码从文本文件读取,然后修改它。然后将修改的内容写入另一个文本文件。 我得到一个空指针异常在out.write(read);
而且,并不是所有的行都在写,可有人帮我。谢谢文件写入器和文件读取器错误
import java.util.*;
import java.io.*;
public class File
{
BufferedReader in;
BufferedWriter out;
String read;
public File()
{
try {
in = new BufferedReader(new FileReader("myFile.txt"));
Scanner scan = new Scanner(in);
out = new BufferedWriter(new FileWriter("output.txt"));
while (scan.hasNext()) {
read = in.readLine();
//Write codes to modify file here
//___codes not written yet______//
out.write(read);
scan.next();
System.out.println("file output: " + read);
}
out.close();
in.close();
} catch (IOException e) {
System.out.println("There was a problem:" + e);
}
}
public static void main(String[] args)
{
File File = new File();
}
}
,摆脱以下'的readLine()'的。 – EJP
这是什么问题? –
@VishalRathod如果你喜欢处理_every_行,读取两次也许不聪明。 – Tom