java - 如何同时将子字符串转换为整数并存储它们以供将来使用？

Question

我正在读取文本文件的某些部分并将其显示在命令窗口上。子串实际上是数字。当我执行类似

的操作时，我想将该文本转换为字符串

int real_numbers = Integer.parseInt(number);

它给出了一个错误:

java.lang.NumberFormatException: For input string: "0.0091" at java.lang.NumberFormatException.forInputString(Unknown Source) at java.lang.Integer.parseInt(Unknown Source) at java.lang.Integer.parseInt(Unknown Source)

下面是给出此特定错误的代码:

String read = "";
String number ="";

for (int linenum=0; linenum<400; linenum++) {
    read = inputFile2.readLine();
    if(read == null){}
    else{
        if (read.startsWith("D")) {
            number = read.substring(9,15);
            System.out.println(number);

            int real_numbers = Integer.parseInt(number); 
            System.out.println(real_numbers);
        }
    }
}

Answer 1

嗯，0.0091 不是整数。您可能想要

Float.parseFloat(number);