请看下面的代码片段:
当我多次执行代码时,输出的结果是随机的。有时候System.out语句会先在控制台中打印,有时候System.err会先打印。以下是我得到的随机输出结果。
为什么会这样呢?
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
public class ReadFile {
public static void main(String[] args) {
String str="";
FileReader fileReader=null;
try{
// I am running on windows only & hence the path :)
File file=new File("D:\\Users\\jenco\\Desktop\\readme.txt");
fileReader=new FileReader(file);
BufferedReader bufferedReader=new BufferedReader(fileReader);
while((str=bufferedReader.readLine())!=null){
System.err.println(str);
}
}catch(Exception exception){
System.err.println("Error occured while reading the file : " + exception.getMessage());
exception.printStackTrace();
}
finally {
if (fileReader != null) {
try {
fileReader.close();
System.out.println("Finally is executed.File stream is closed.");
} catch (IOException ioException) {
ioException.printStackTrace();
}
}
}
}
}
当我多次执行代码时,输出的结果是随机的。有时候System.out语句会先在控制台中打印,有时候System.err会先打印。以下是我得到的随机输出结果。
输出1
Finally is executed.File stream is closed.
this is a text file
and a java program will read this file.
输出 2
this is a text file
and a java program will read this file.
Finally is executed.File stream is closed.
为什么会这样呢?