Question

我正在研究netbeans ...我需要读取一个文件并标记然后将其存储在一个数组中以供将来的操作....我已经附加了代码，其中line5包含令牌...转换时进入数组iam得到错误

例外：

" Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 1000
at preprocess.mainpage.jButton2ActionPerformed(mainpage.java:224)
at preprocess.mainpage.access$100(mainpage.java:18)
at preprocess.mainpage$2.actionPerformed(mainpage.java:62)"

代码：

int counter=-1;
           int n=0;
           String[] arr = new String[1000];
try
{

    BufferedReader b = new BufferedReader(new FileReader("C:/Users/sky/Documents/NetBeansProjects/Preprocess/src/preprocess/cdr1.txt"));
                    String line;
                    while ((line = b.readLine()) != null)
                    {
                       counter+=1;
                       StringTokenizer st2 = new StringTokenizer(line, " ");
                       String line5 = (String) st2.nextElement();
                       arr[n] = line5;
                       n++;
                    }
}
catch (Exception e)
{
}

Answer 1

ArrayIndexOutOfBoundsException 因为你的数组大小可能更小。所以最好使用ArrayList，如下所示：

int counter=-1;
int n=0;
//String[] arr = new String[1000];
List<String> list = new ArrayList<String>(); // Create ArrayList
try{    
    BufferedReader b = new BufferedReader(new FileReader("C:/Users/sky/Documents/NetBeansProjects/Preprocess/src/preprocess/cdr1.txt"));
    String line;
    while ((line = b.readLine()) != null) {
         counter+=1;
         StringTokenizer st2 = new StringTokenizer(line, " ");
         String line5 = (String) st2.nextElement();
         //arr[n] = line5;
         //n++;
         list.add(line5); // Add you string into list
   }
 String[] aa = list.toArray(new String[0]); // convert list into String of array if you need it
}
catch (Exception e){
}

标记化输出到字符串中的数组

1 个答案: