An error occurred while converting String to int.

An error occurred while converting String to int.

Preface

I plan to write a blog almost a year ago, but I haven't written it for various reasons. Instead, some of my colleagues wrote it shortly after I suggested that they write a blog, such as Zhang Bo, I will write an article every time I sum up a knowledge point. This will not only make IT easier for me to view and read IT later, but also facilitate the reference of IT friends.

Today is July 22, April 25, 2017, with light rain. I was planning to write it again at night, but I don't want to drag it any more. I encountered a string-to-int type error during Excel parsing and file uploading last night. So I will write my first blog today. Although simple, it is also a good start. I hope that I can stick to writing and write some good blogs in the future. Of course, if you can find a solution to the problem from your blog, I am very pleased.

The following is a simple program:

1 package com. gxxy. team1.yyd. controller; 2 3 public class NumDemo {4 public static void main (String [] args) {5 String num1 = "2333"; 6 String num2 = "414.0 "; 7 // you can use the following method to convert an Integer string to int 8 int intNum1 = Integer. parseInt (num1); 9 int intNum3 = Integer. valueOf (num1); 10 // float string cannot be converted into an Integer int11 directly using the following method // int intNum2 = Integer. parseInt (num2); 12 // int intNum4 = Integer. valueOf (num2); 13 // if you want to convert it to "double" type, then convert it to int14 Double douNum1 = Double. valueOf (num1); 15 Double douNum2 = Double. valueOf (num2); 16 17 int intNum5 = douNum1.intValue (); 18 int intNum6 = douNum2.intValue (); 19 System. out. println ("-----------" + intNum1); 20 System. out. println ("-----------" + intNum3); 21 System. out. println ("-----------" + douNum1 + "," + douNum2); 22 System. out. println ("-----------" + intNum5 + "," + intNum6); 23} 24}

If you use the following method for conversion, the following error is returned: int intNum2 = Integer. parseInt (num2); int intNum4 = Integer. valueOf (num2); Exception in thread "main" java. lang. numberFormatException: For input string: "414.0" at java. lang. numberFormatException. forInputString (NumberFormatException. java: 65) at java. lang. integer. parseInt (Integer. java: 580) at java. lang. integer. parseInt (Integer. java: 615) at com. gxxy. team1.yyd. controller. numDemo. main (NumDemo. java: 11)