java读取txt文件

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

public class ClassInfoSort {

	public static void main(String[] args) {
		reader();
	}
	public static void reader() {
		File file = new File("test.txt");
		FileInputStream fin = null;
		try {
			fin = new FileInputStream(file);
			byte[] b = new byte[fin.available()];
			fin.read(b);
			String str = new String(b,"UTF-8");
			System.out.println(str);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				fin.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		
	}
}