方法拋出NumberFormatException它不應該到目前為止正常工作

Question

當我轉換的字符串是int時，我似乎無法弄清楚為什么它會拋出NFE

[碼]

 public void setCurrentTransferRate(){
    try{
        long startTime = System.currentTimeMillis();  
        String[] command = {"/bin/sh", "-c", "ifconfig " + interface_name + " | grep -oP     'RX bytes:[0-9]{1,11}'"};
        String[] command1 = {"/bin/sh", "-c", "ifconfig " + interface_name + " | grep -oP 'TX bytes:[0-9]{1,11}'"};
        Process child = Runtime.getRuntime().exec(command);
        Process child1 = Runtime.getRuntime().exec(command1);
        BufferedReader r = new BufferedReader(new InputStreamReader(child.getInputStream()));       //i prwti metrisi twn RX kai TX bytes
        BufferedReader r1 = new BufferedReader(new InputStreamReader(child1.getInputStream()));
        String temp = r.readLine();
        temp = temp.replace("RX bytes:","");   
        String temp1 = r1.readLine();
        temp1 = temp1.replace("TX bytes:","");  
        r.close();              
        r1.close();
        int x = Integer.parseInt(temp);         
        int y = Integer.parseInt(temp1); 
    }catch(IOException e){e.printStackTrace();}        
    catch(InterruptedException e){e.printStackTrace();}
   }[/code]

產生錯誤的字符串是temp

我得到了錯誤

[碼]

 Exception in thread "Thread-0" java.lang.NumberFormatException: For input string:  "3262469144"
  at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
  at java.lang.Integer.parseInt(Integer.java:495)
  at java.lang.Integer.parseInt(Integer.java:527)
  at askisi1.General.setCurrentTransferRate(General.java:187)
  at askisi1.General.<init>(General.java:27) 
  at askisi1.mainThread.run(mainThread.java:17)
  at java.lang.Thread.run(Thread.java:722)[/code]

我真的可以用一雙新鮮的眼睛

Answer 1

整數的最大正值是Integer.MAX_VALUE ，即2,147,483,647 。 你可以用一個長的代替：

long x = Long.parseLong(temp);

它應解決您的問題（如果您的所有數字都小於Long.MAX_VALUE或9,223,372,036,854,775,807 ）。

Answer 2

3262469144對於int來說太大了！