在java中使用绝对路径打开文件

File file = new File("C:\\path\\to\\file.txt");

import java.io.File;
import java.io.FileReader;
import import java.io.IOException;

public class Main {
    public static void main(String[] args) {
        File file = new File("C:\\path\\to\\file.txt");
        try (FileReader reader = new FileReader(file)) {
            int character;
            while ((character = reader.read()) != -1) {
                System.out.print((char) character);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}