Java Exception Practice

Build the exception package, write the Testexception.java program, the main method has the following code, to determine the possible exceptions, to capture processing.

 PackageCom.yichang; Public classTestException { Public Static voidMain (string[] args) { for(inti = 0; I < 4; i++) {            intK; Switch(i) { Case0:                Try{                intZero = 0; K= 911/Zero;  Break;} Catch(Exception ex) {ex.printstacktrace (); System.out.println ("Running an arithmetic exception" +ex.getmessage ()); }             Case1:                Try{                intB[] =NULL; K= B[0];} Catch(Exception ex) {ex.printstacktrace (); System.out.println ("Run null pointer exception" +ex.getmessage ()); }                 Break;  Case2:                Try{                intC[] =New int[2]; K= C[9];} Catch(Exception ex) {ex.printstacktrace (); System.out.println ("Run Exception" +ex.getmessage ()); }                 Break;  Case3:                Try{                CharCH = "abc". CHARAT (99);} Catch(Exception ex) {ex.printstacktrace (); System.out.println ("Run Exception" +ex.getmessage ()); }                 Break; }        }    }}

Set up the exception package, set up a bank class, the class has a variable double balance represents a deposit, the bank class construction method can increase the deposit, the bank class has the withdrawal method withdrawal (double damount), when the amount of withdrawals is greater than the deposit , throws the insufficientfundsexception, the withdrawal amount is negative, throws Nagativefundsexception, if the new bank (100), represents the deposit bank 100 yuan, when uses the method withdrawal (150), Withdrawal (-15) throws a custom exception.

 package   exception;  public  class     Insufficientfundsexception extends   Exception {  public   Insufficientfundsexception ( String String {}  public   insuffic    Ientfundsexception () {System.out.println ( "Insufficient balance" ); }}

 Package exception;  Public class extends Exception {    public  nagativefundsexception (String string) {            }    public  nagativefundsexception () {        System.out.println ("withdrawal cannot be negative");}    }

 Packageexception; Public classBank {Private Doublebalance;  PublicBank (Doublebalance) {        Super();  This. Balance =balance; }     Public DoubleGetBalance () {returnbalance; }     Public voidSetbalance (Doublebalance) {         This. Balance =balance; }    DoubleWithDrawal (DoubleDamount)throwsException {if(damount>balance) {            Throw Newinsufficientfundsexception (); }        if(damount<0)        {            Throw Newnagativefundsexception (); }        return  This. Balance; }     Public Static voidMain (string[] args) {Bank b=NewBank (100); Try{B.withdrawal (150); } Catch(Exception e) {e.printstacktrace (); }        Try{B.withdrawal (-15); } Catch(Exception e) {e.printstacktrace (); }    }}

Java Exception Practice