1 package com.kai.li.HomeWork0923;  2   3 /**  4   *work class for all the class  5   */  6 public class HomeWork0923{  7   8     /**  9       *main fuction for all the text 10       */ 11     public static void main(String[] args){     12         //questions of part 1  13         for(int i=0;i<4;i++){ 14             int  k; 15             switch(i){ 16                 case 0: 17                     try{ 18                         int zero=0; 19                         k=911/zero; 20                         break; 21                     }catch(ArithmeticException e){ 22                         System.out.println(e.getMessage()); 23                     }catch(Exception e){ 24                         e.printStackTrace(); 25                         System.out.println(e.getMessage()); 26                     } 27                 case 1: 28                     try{ 29                         int[] b=null; 30                         k = b[0]; 31                         break; 32                     }catch(NullPointerException e){ 33                         System.out.println(e.getMessage()); 34                     }catch(Exception e){ 35                         e.printStackTrace(); 36                         System.out.println(e.getMessage()); 37                     } 38                 case 2: 39                     try{ 40                         int c[]=new int[2]; 41                         k = c[9]; 42                         break; 43                     }catch(ArrayIndexOutOfBoundsException e){ 44                         System.out.println(e.getMessage()); 45                     }catch(Exception e){ 46                         e.printStackTrace(); 47                         System.out.println(e.getMessage()); 48                     } 49                 case 3:  50                     try{ 51                         char ch = "abc".charAt(99); 52                         break; 53                     }catch(StringIndexOutOfBoundsException e){ 54                         System.out.println(e.getMessage()); 55                     }catch(Exception e){ 56                         e.printStackTrace(); 57                         System.out.println(e.getMessage()); 58                     } 59             } 60         } 61         //questions of part 2 62         Bank bank=new Bank(100); 63         try{ 64             bank.withDrawal(150); 65         }catch(InsufficientFundsException e){ 66             e.printStackTrace(); 67         }catch(NagativeFundsException e){ 68             e.printStackTrace(); 69         } 70         bank=new Bank(100); 71         try{ 72             bank.withDrawal(-15); 73         }catch(NagativeFundsException e){ 74             e.printStackTrace(); 75         }catch(InsufficientFundsException e){ 76             e.printStackTrace(); 77         } 78         //questions of part 3 79         InterfaceX ix=()->{}; 80         ix.forl(‘a‘,26); 81         ix.forl(‘A‘,26);     82     } 83 } 84 /** 85   *this example is texted of exception 86   */ 87 //define the class bank ,it has some functions with text 88 class Bank{ 89     private double balance; 90     Bank(){ 91         this.balance=0; 92     } 93     Bank(double balance){ 94         this.balance=balance;     95     } 96     public double getBalance(){ 97         return this.balance; 98     } 99     public void withDrawal(double dAmount) throws InsufficientFundsException,NagativeFundsException{100         if(balance<dAmount)101             throw new InsufficientFundsException();102         if(dAmount<0)103             throw new NagativeFundsException();104         this.balance-=dAmount;105     }106 }107 //define the first exception by self108 class InsufficientFundsException extends Exception{109     @Override110     public void printStackTrace(){111         super.printStackTrace();112         System.out.println("------------");113     }114 }115 //define the seconde exception by self 116 class NagativeFundsException extends Exception{117     @Override118     public void printStackTrace(){119         super.printStackTrace();120         System.out.println("||||||||||||");121     }122 }123 /**124   *define a function interface125   *it is created for the lembda126   */127 @FunctionalInterface128 interface InterfaceX{129     void printLetter();130     default public void forl(int a,int b){131         for(int i=a;i<a+b;i++){132             System.out.print((char)i+" ");133         }134         System.out.println();    135     }136 }