import java.io.File;

import java.io.InputStream;

import java.io.FileInputStream;

import java.io.IOException;

public class Test

{

	public static void main(String[] args) throws IOException{

		//选择源

		File src = new File("C:\\Users\\live\\Desktop\\课堂笔记和资料\\a.txt");

		System.out.println(src.getAbsolutePath());

		//选择流:根据源文件来选择合适的流

		InputStream is = new FileInputStream(src);

		//操作

		int data1;

		int data2;

		int data3;

		int data4;

		int data5;

		data1 = is.read();

		data2 = is.read();

		data3 = is.read();

		data4 = is.read();

		data5 = is.read();

		System.out.println((char)data1);

		System.out.println((char)data2);

		System.out.println((char)data3);

		System.out.println((char)data4);

		System.out.println((char)data5);

		//关闭流

		is.close();

	}

}

int tmp;

while((tmp=is.read())!=-1){
//操作

　　System.out.println((char)tmp);

}