将 Java 扫描仪（文件）中的一行转换为数组

Question

All I am writting a simple java method that reads a text file of place names and will then map them to some characteristics...

This is the first time in java that I have read from a file.

I have written the code below that works - it reads the first line.

But what I want to do is to turn this line into a character array so that I can compare each character to a unsorted file and then map the words.

But I am struggling with a very basic challenge. How do I map the sc.scanner to a character array

Or should I use BufferReader

       File file = new File ("c:/Users/Green/documents/places.txt");
                Scanner sc = new Scanner(file);

       //   while (sc.hasNextLine())

               System.out.println(sc.nextLine());

Answer 1

There is a method of String which is toCharArray() .

See the String documentation .

Answer 2

As documented the method Scanner. nextLine returns a String, you can transform it to a character array using String. tocharArray and after iterate over it like below:

String line = sc.nextLine();
char[] arr = line.toCharArray();
for (char ch: arr) {
  ...here your logic
}