一道關于java異常處理的題目

2019-11-26 13:47:50

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1、建立exception包,編寫TestException.java程序，主方法中有以下代碼，確定其中可能出現的異常，進行捕獲處理。

public class YiChang {public static void main(String[] args){for(int i=0;i<4;i++){int k;switch(i){case 0: int zero=0; try{k=911/zero;}catch(ArithmeticException e){System.out.println("出現算數異常！");}break;case 1: try{int b[]=null;k = b[0];}catch(NullPointerException e){System.out.println("出現空指針異常！");}break;case 2:int c[]=new int[2];try{k=c[9];}catch(ArrayIndexOutOfBoundsException e){System.out.println("出現數組序號溢出！");}break;case 3:try{char ch="abc".charAt(99);}catch(StringIndexOutOfBoundsException e){System.out.println("出現數據類型轉換異常！");}break;}}}}

2、建立exception包，建立Bank類，類中有變量double balance表示存款,Bank類的構造方法能增加存款，Bank類中有取款的發方法withDrawal(double dAmount),當取款的數額大于存款時,拋出InsufficientFundsException,取款數額為負數，拋出NagativeFundsException,如new Bank(100),表示存入銀行100元，當用方法withdrawal(150)，withdrawal(-15)時會拋出自定義異常。

public class InsufficientFundsException extends Exception {public String getMessage(){return "您的余額不足！";}} public class NagativeFundsException extends Exception{public String getMessage(){return "取款金額不能為負數！";}} public class Bank {private static double balance;Bank(){};Bank(double balance){this.balance=balance;}public static void withDrawal(double dAmount) throws InsufficientFundsException,NagativeFundsException{if(dAmount>balance){throw new InsufficientFundsException();}if(dAmount<0){throw new NagativeFundsException();}}public static void main(String[] args){Bank b=new Bank(100);System.out.println("我有"+balance+"元存款！");try{withDrawal(150);}catch(InsufficientFundsException | NagativeFundsException e){e.printStackTrace();}try{withDrawal(-15);}catch(NagativeFundsException |InsufficientFundsException e){e.printStackTrace();}} }