從文本文件和工作獲取整數數組列表在Java

Question

我有文本文件，該文件是包含：

「我有3個蘋果和香蕉1
所有的人有4輛車，至少。」

我想讀取這個.txt文件並從中獲取整數。我將在arrayList中讀取整數變量。

public class dedede { 
    public static void al() throws Exception { 

     File f = new File("C:\\users\\sony\\Desktop\\456.txt"); 

     try { 
      FileReader islem = new FileReader(f); 

      char data[] = new char[(int) f.length()]; 

      islem.read(data); 
      String metin = new String(data); 

      ArrayList<Integer> yapi = new<Integer> ArrayList(); 

      StringTokenizer s = new StringTokenizer(metin); 

      String dizi[] = new String[s.countTokens()]; 

      int i = 0; 
      while (s.hasMoreTokens()) { 
       dizi[i] = s.nextToken(); 
       i++; 
      } 

      for (int c = 0; c < dizi.length; c++) { 
       if (Integer.parseInt(dizi[c]) > 0) { 
        yapi.add(Integer.parseInt(dizi[c])); 
       } 

      } 

      System.out.println(yapi); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 

    } 

    public static void main(String[] args) throws Exception { 
     al(); 
    } 
} 

Answer 1

試試這個：

static ArrayList<Integer> al = new ArrayList<Integer>(); 

public static void main(String[] args) { 

    try { 
     File file = new File("C:\\users\\sony\\Desktop\\456.txt"); 
     BufferedReader in = new BufferedReader(new FileReader(file)); 
     String s; 
     while ((s = in.readLine()) != null) { 
      findInteger(s); 
     } 
     in.close(); 
    } catch (IOException e) { 
     System.out.println("File Read Error: " + e.getMessage()); 
    } 
    System.out.println("Integers: " + al); 
} 

private static void findInteger(String s){ 
    String [] parts = s.split(" "); 

    for (int i = 0; i < parts.length; i++) { 
     try{ 
      int j = Integer.parseInt(parts[i]); 
      al.add(j); 
     } catch (Exception e){} 
    } 
}