Question

我正在尝试从facebook帐户获取按摩计数，通知计数和朋友请求计数。从facebook获取字符串数据后，我使用Interger.parseInt（String）方法将其转换为interger。根据我的代码逻辑，我将来自facebook的数据放入错误，error1和error2，当它们是一个字符串，并在将它们转换为interger之后，我将它们放在actualfriend，actualmassage和actualnotification中。最后，我将实际数据与一些预期数据进行比较。

问题是我得到按摩计数的正确结果但是对于朋友请求和通知我在error1和error2中得到正确的数据但是一旦我将它们从字符串转换为整数他们我得到actualfriend = 0和actualnotification = 0。

 public  void operation() throws InterruptedException, AWTException ,StaleElementReferenceException,NoSuchElementException,NumberFormatException {
      int i=1;
      int j=1;
      while(i==1){
      String error = "1";
      String error1= "1";
      String error2= "1";
      System.out.println(error);
      if((error.length() != 0) && (error1.length() != 0) && (error2.length() != 0)){ 
      try{
       actualmassage = Integer.parseInt(error);
        }catch (NumberFormatException e) {
          error="5";
           try{ 
            actualnotification=Integer.parseInt(error1);
             }catch(NumberFormatException ee){
              error1="5";
               try{ 
                actualfriend=Integer.parseInt(error2);
                 }catch(NumberFormatException eee){
                   error2="5";
                 }//catch3
               }//catch2
           }//catch3
      }//if for massage 
      else if((error.length() !=0) && (error1.length() !=0) && (error2.length() !=0)){
          actualmassage = Integer.parseInt(error);
          actualnotification = Integer.parseInt(error1);
          actualfriend = Integer.parseInt(error2);
      }//else if
      else{

      }//else
      int expectedmassage =1;
      int expectednotification=0;
      int expectedfriend=0;
      if(expectedmassage == actualmassage ){
          Thread.sleep(4000);
          System.out.println("Readable Massage = "+error +" actualmassage = "+actualmassage);
      }else{
          System.outprintln("Does't Match");
          i++;
      }//else
      if(expectednotification == actualnotification){
          Thread.sleep(4000);
          System.out.println("Total Notification = "+error1 +" actualnotification = "+actualnotification);
      }else{
          System.outprintln("Does't Match");
          i++;
      }//else
      if(expectedfriend == actualfriend ){
          Thread.sleep(4000);
          System.out.println("Total FriendRequest = "+error2 +" actualfriend = "+actualfriend);
      }else{
          System.outprintln("Does't Match");
          i++;
      }//else

    //Counting number of runs
      System.out.println("Number of run = " + j);
      j++;
      }//while
      System.out.println("Stop");
      i=(i+2);  
 }//operation
public static void main(String[] args) throws StaleElementReferenceException, InterruptedException, AWTException,NoSuchElementException,NumberFormatException{
    fb c = new fb();
   }//main
  }//calss

Output for this-
1
Readable Massage = 1 actualmassage = 1
Total Notification = 1 actualnotification = 0
Total FriendRequest = 1 actualfriend = 0
Number of run = 1
1
Readable Massage = 1 actualmassage = 1
Total Notification = 1 actualnotification = 0
Total FriendRequest = 1 actualfriend = 0
Number of run = 2

正如你所看到的那样 - 可读按摩= 1（从错误变量得到）actualmassage = 1（从字符串转换为整数后从实际按摩得到）。总通知= 1（从error1变量获得）actualnotification = 0（从将其转换为字符串整数后从实际按摩得到）这是错误的。 Total FriendRequest = 1（从error2变量获取）actualfriend = 0（从将其转换为字符串整数后从实际的朋友获取）这是错误的。

更改了代码 -

      int expectedmassage =1;
      int expectednotification=0;
      int expectedfriend=0;
      if(expectedmassage == actualmassage ){
          Thread.sleep(4000);
          System.out.println("Readable Massage = "+error +" actualmassage = "+actualmassage);
      }else{
          System.out.print("Does't match");
          i++;
      }//else
      if(expectednotification == Integer.parseInt(error1)){
          Thread.sleep(4000);
          System.out.println("Total Notification = "+error1 +" actualnotification = "+actualnotification);
      }else{
          System.out.print("Does't match");
          i++;
      }//else
      if(expectedfriend == Integer.parseInt(error2)){
          Thread.sleep(4000);
          System.out.println("Total FriendRequest = "+error2 +" actualfriend = "+actualfriend);
      }else{
          System.out.print("Does't match");
          i++;
      }//else

但是这样做之后我得到了 -

 1
java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at com.selenium.fb.main1(fb.java:103)
at com.selenium.fb.main(fb.java:123)

Answer 1

它看起来像第一个if（error.length（）！= 0）＆amp;＆amp; （error1.length（）！= 0）＆amp;＆amp; （error2.length（）！= 0）无法将值分配给actualnotification和actualfriend，因为它没有到达它们。使用下面的代码更改代码。我为每个创建了单独的if块并且它有效。

     try{
       actualmassage = Integer.parseInt(error);
        }catch (NumberFormatException e) {
          error="0";
        }//catch1
      }//if1
         if((error1.length() != 0)){
           try{ 
            actualnotification=Integer.parseInt(error1);
             }catch(NumberFormatException ee){
              error1="0";
               }//catch2
           }//if2   
        if((error2.length() != 0)){ 
              try{
                   actualfriend=Integer.parseInt(error2);
                 }catch(NumberFormatException eee){
                   error2="0";
                 }//catch3
                }//if3

无法将字符串转换为整数。有时会得到NumberFormatException

1 个答案: