替換一個文本文件中的列之間有variouse空格的列

Question

我有一個包含20000行的文本文件。數據以列的形式存在。但列之間的空格不同，列長也不同。例如

aaaaa()()()()()bdo()()()()()()()() ttttt()() dgee()()()()() yyyy 

bbb()()()()()()()ggg()()()()()()()( fff()()()(gbe()()()()()()(yHH 

cc()()()()()()()()dddd()()()()()()() I()()()()bdeg()()()()()()yyyyy 

這裏的空格代表括號 就像那樣！

我要替換第N個（例如：4日）與特定單詞（比如：「名字」）列

例如出認沽：

aaaaa()()()()()bdo()()()()()()()() ttttt()() name()()()()() yyyy 

bbb()()()()()()()ggg()()()()()()()( fff()()()(name()()()()()()(yHH 

cc()()()()()()()()dddd()()()()()()() I()()()()name()()()()()()yyyyy 

這裏的空間從支架 誰能代表幫我解決這個問題？

Answer 1

public static void replaceColumn(int column, String word, File file) throws IOException { 
    Scanner in = new Scanner(file); 
    PrintWriter out = new PrintWriter(file); 
    while (in.hasNextLine()) { 
     String line = in.nextLine(); 
     line = line.trim(); 
     String columns = line.split(" "); 
     columns[column] = word; 
     line = arrayToString(columns, " "); 
     out.println(line); 
    } 
    in.close(); 
    out.close(); 
} 

//Helper method 
private static String arrayToString(Object[] array, String separator) { 
    if (array.length == 0) { 
     return ""; 
    } 
    StringBuilder sb = new StringBuilder(); 
    for (Object element : array) { 
     sb.append(element); 
     sb.append(separator); 
    } 
    sb.delete(sb.length - separator.length(), sb.length()); 
    return sb.toString(); 
}