java:40: 错误：异常 FileNotFoundException 永远不会在相应的 try 语句的主体中抛出

Question

我正在尝试使用 Java 打开一个文件。如果操作不成功，我的程序应该输出The file was not found, please download file with name DateTemp.csv.。这是我的代码：

File myFile = new File("DateTemp.csv");                     //File Name
Scanner inputFile = new Scanner(myFile);                    //scanner to input file name
try {
    //Try to display one too many array elements.
    myFile = new File("DateTemp.csv");
    for (int i = 0; i <= templow.length; i++);
    for (int i = 0; i <= temphigh.length; i++);
    //System.out.println(temphigh[i]);
    //System.out.println(templow[i]);
} catch (ArrayIndexOutOfBoundsException e) {
    System.out.println("Invalid array index exceeds Array Size.");                  //catch block to declare the array index was too large
} catch (FileNotFoundException e) {
    System.out.println("The File was not Found, please download file with name DateTemp.csv");
    System.exit(1);
}

Answer 1

将Scanner inputFile = new Scanner(myFile); 代码放在try 块内