看到 NumberFormatException 时，您需要确定输入是否错误或代码错误.

When you see a NumberFormatException, you need to decide if your input is wrong, or your code is wrong.

如果您输入的错误，则需要添加代码，例如，在***生成会产生漂亮外观错误的代码.

If your input is wrong, you need to add code that produces a nice-looking error at the top level, e.g.

try {
    parseMyFile();
} catch (NumberFormatException nfe) {
    System.err.println("File contains invalid numbers: "+nfe.getMessage());
}

如果要允许此输入，例如因为可以使用空字符串代替数字，检查特定输入或在循环内捕获 NumberFormatException :

If you want to allow this input, e.g. because it's OK to have empty strings in place of numbers, check for specific input, or catch NumberFormatException inside the loop:

for (String number : numbers){
    if (number.length() != 0) {
        ary[j++] = Integer.parseInt(number); 
    } else {
        ary[j++] = 0; // In this case, zero is the same as "empty"
    }
}