Java's exception handling (throws)

com.atguigu.java1 Package; 

Import java.io.File; 
Import a java.io.FileInputStream; 
Import java.io.FileNotFoundException; 
Import java.io.IOException; 

/ * 
* exception handling two ways: throws + Exception Type 
* 
* 1. "throws + exception type" written method statement at. When indicating that this method is performed, the type of exception might be thrown. 
* Once when performing the method body, abnormal, the object will generate an exception when the error code of the class, this object is satisfied after throws exception 
* time type, it will be thrown. Exception codes follow the code will no longer perform! 
*      
* 2. Experience: try-catch-finally: The real exception to dispose of. 
* Throws a way only exception thrown to the caller of the method. It does not really get rid of the abnormal.  
* 
* 3. How to develop, select Use try-catch-finally or the use of throws? 
* 3.1 If the parent class is not being overwritten manner throws exception Subclasses override method can not be used throws, meaning that if 
* subclass overrides the method there is an abnormality, must try-catch-finally approach.
* 3.2 performed in a method, has also called several other methods, these methods are progressive implementation of relations. We recommend the use of these methods throws 
* way process. The method is performed using a conceivable embodiment try-catch-finally processed. 
* 
* / 
Public class ExceptionTest2 { 
   
   
   public static void main (String [] args) { 
      the try { 
         method2 (); 
         
      } the catch (IOException E) { 
         e.printStackTrace (); 
      } 
      
// the method3 (); 
      
   } 
   
   
   public static void the method3 ( ) { 
      the try { 
         method2 (); 
      } the catch (IOException E) { 
         e.printStackTrace (); 
      } 
   } 
   
   
   public static void method2 () throws IOException { 
      the method1 (); 
   }
   
   
   public static void method1() throws FileNotFoundException,IOException{
      File file = new File("hello1.txt");
      FileInputStream fis = new FileInputStream(file);
      
      int data = fis.read();
      while(data != -1){
         System.out.print((char)data);
         data = fis.read();
      }
      
      fis.close();
      
      System.out.println("hahaha!");
   }
   
   
}