Java 如何使用printwriter创建和写入文件
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how to use printwriter to create and write to a file
提问by Brandon Nolan
I am trying to create a new file and print data to said file using the printwriter class.
我正在尝试使用 printwriter 类创建一个新文件并将数据打印到所述文件。
My code looks like this
我的代码看起来像这样
File Fileright = new File("C:\GamesnewOrder.txt");
PrintWriter pw = new PrintWriter(Fileright);
for(int i =0;i<=Games2.length-1;i++)
{
pw.println(Games2[i]);
}
pw.close();
I do have the main method with a throwsIOException.
我确实有一个带有throwsIOException.
The error java.iofilenotfoundexception keeps appearing at the line where I am creating the printwriter. So is the printwriter not creating the file?
错误java.iofilenotfound异常一直出现在我创建印刷机的那一行。那么印刷商没有创建文件吗？
回答by novice
the code works for me.
代码对我有用。
import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
public class NewClass {
void n() throws FileNotFoundException {
File Fileright = new File("/home/ubuntu/Documents/f.txt");
PrintWriter pw = new PrintWriter(Fileright);
for (int i = 0; i <= 3; i++) {
pw.println(i);
System.out.println(i);
}
pw.close();
}
public static void main(String[] args) throws FileNotFoundException {
new NewClass().n();
}
}
output:(in file: /home/ubuntu/Documents/f.txt)
输出：（在文件中：/home/ubuntu/Documents/f.txt）
0
1
2
3
0
1
2
3
回答by Jaskey
FileNotFoundException - If the given file object does not denote an existing, writable regular file and a new regular file of that name cannot be created, or if some other error occurs while opening or creating the file
FileNotFoundException - 如果给定的文件对象不表示现有的、可写的常规文件，并且无法创建该名称的新常规文件，或者在打开或创建文件时发生其他错误
Please check the file Permission, you may use canRead(), canWrite()to check that, but it may not be sufficient enough.
请检查文件 Permission，您可以使用canRead(),canWrite()来检查，但这可能还不够。
