package xtx;

import java.io.FileReader;

public class TryCatch {
    public static void main(String[] args)throws Exception {
        //同理向上抛出throws Exception
        readFile("d:/a.txt");
    }
    public  static void readFile(String path) throws Exception{
        //在不想处理异常时向上抛出，throws谁调用谁处理
        FileReader reader = null;
        try{
            reader = new FileReader("d:/a.txt");
            char c1 = (char) reader.read();
            char c2 = (char) reader.read();
            System.out.println(""+c1+c2);
            //在声明异常中可以不需要catch，但必须要有finally
            //用来关闭上面申请的资源
        } finally {
            try {
                if (reader !=null){
                    reader.close();
                }
            }catch (Exception e){
                e.printStackTrace();
            }
        }
    }
}

感觉有点懵，不理解try-catch-finally的作用