java中IO流异常处理

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

 public class Demo4 {

     public static void main(String[] args) {
         // TODO Auto-generated method stub

         getFile();
     }

     public static void getFile() {

         //1.找到目标文件
         File file = new File("D:\\a.txt");
         //2.建立通道
         FileInputStream inputStream = null;
         try {
             inputStream = new FileInputStream(file);
             byte[] b = new byte[1024];
             try {
                 int count = inputStream.read(b);
                 System.out.println(new String(b,0,count));
             } catch (IOException e) {

                 System.out.println("硬盘损坏了,请修理");

                 throw new RuntimeException(e);
             }

         } catch (FileNotFoundException e) {

             System.out.println("文件不存在");
             //提示用户有错误要修改
             //让后面的代码定制运行
             //System.exit(0); 不太好，一般是不随意推出虚拟机。
             throw new RuntimeException(e);  //创建一个运行时异常
         }finally {

             try {
                 inputStream.close();
             } catch (IOException e) {
                 System.out.println("关闭失败");
                 throw new RuntimeException(e);
             }
         }
     }
 }