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(xiàn)的異常，進(jìn)行捕獲處理。
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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(xiàn)算數(shù)異常！");}break;case 1: try{int b[]=null;k = b[0];}catch(NullPointerException e){System.out.println("出現(xiàn)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(xiàn)數(shù)組序號溢出！");}break;case 3:try{char ch="abc".charAt(99);}catch(StringIndexOutOfBoundsException e){System.out.println("出現(xiàn)數(shù)據(jù)類型轉(zhuǎn)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(gòu)造方法能增加存款，Bank類中有取款的發(fā)方法withDrawal(double dAmount),當(dāng)取款的數(shù)額大于存款時(shí),拋出InsufficientFundsException,取款數(shù)額為負(fù)數(shù)，拋出NagativeFundsException,如new Bank(100),表示存入銀行100元，當(dāng)用方法withdrawal(150)，withdrawal(-15)時(shí)會拋出自定義異常。
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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(fù)數(shù)！";}} 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();}} } |
一道關(guān)于一道關(guān)于java異常處理的題目就給大家介紹這么多，希望對大家有所幫助，如果大家有任何疑問歡迎給我留言，小編會及時(shí)回復(fù)大家的，在此也非常感謝大家對服務(wù)器之家網(wǎng)站的支持！
原文鏈接：http://www.cnblogs.com/jingzhenhua/p/5902377.html
