J2SE _ Exception Handling

The concept of exceptions

Classification of exceptions

exception capture and handling

ImportJava.io.*; Public classTestEx { Public Static voidMain (string[] args) {Try {            NewTestEx (). F2 (); } Catch(IOException e) {e.printstacktrace (); }                /*int[] arr = {1, 2, 3};        System.out.println (arr[2]);        try {System.out.println (2/0);            } catch (ArithmeticException e) {System.out.println ("system is being maintained, please contact the Administrator");        E.printstacktrace (); }        */                //TestEx te = new TestEx (); //TE.M (0);                /*try {new TestEx (). m (0);            } catch (ArithmeticException ae) {ae.printstacktrace ();        SYSTEM.OUT.PRINTLN ("error"); }        */FileInputStream in=NULL; Try{ in=NewFileInputStream ("MyFile.txt"); intb; b=In.read ();  while(b! =-1) {System.out.print (Char) b); b=In.read (); }    } Catch(IOException e) {System.out.println (E.getmessage ()); } Catch(FileNotFoundException e) {e.printstacktrace (); } finally {        Try{in.close (); } Catch(IOException e) {e.printstacktrace (); }    }         }        voidMintIthrowsArithmeticException {if(i==0)             Throw NewArithmeticException ("Divide by 0"); }        voidF ()throwsFileNotFoundException, IOException {fileinputstream in=NewFileInputStream ("MyFile.txt"); intb; b=In.read ();  while(b! =-1) {System.out.print (Char) b); b=In.read (); }    }        voidF2 ()throwsIOException {/*try {f ();        } catch (FileNotFoundException e) {System.out.println (E.getmessage ());        } catch (IOException e) {e.printstacktrace (); }        */f (); }    }

Testex.java

using a custom exception

declaring and Throwing exceptions

J2SE _ Exception Handling