Berkeley CS 61B Data Structures(in Java) Lab6 讨论帖

之前听课的时候还不是很懂throws和try catch的区别 做了这次lab作业终于明白了

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Welcome to the bank
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Valid commands are: open, deposit, withdraw, inquire, quit
--> open
Enter name: nana
nana, your new account number is: 100
Thanks for opening an account with us!
--> deposit
Enter account number: 100
Enter amount to deposit: 100
New balance for #100 is 100
--> deposit
Enter account number: 102
Enter amount to deposit: 100
Enter account number: BadAccountException: Invalid account number: 102
100
Enter amount to deposit: 50
New balance for #100 is 150
--> withdraw
Enter account number: 100
Enter amount to withdraw: 40
New balance for #100 is 110
--> withdraw
Enter account number: 103
Enter amount to withdraw: 10
BadAccountException: Invalid account number: 103
Enter account number: 100
Enter amount to withdraw: -30
Enter account number: BadTransactionException: Negative amount: -30
100
Enter amount to withdraw: 60
New balance for #100 is 50
--> inquire
Enter account number: 100
Balance for #100 is 50
--> quit

Process finished with exit code 0

弄是弄出来了，但是这个bug是怎么回事：直接run，会先出现enter account number的字样，再出现exception，而且只出现一次。之后还会出现exception，然后没有换行直接出现enter account number的字样，也是只出现一次。但是！！我用debug F6一步一步调试，就全都正常

throw来throw去 挺好玩的哈哈~ 要搞清楚这么多个file之间的相互调用关系，还是很难，看了半天基本明白了，但是想象一下如果是要我自己写，那就绝对不行了……

打个卡，exception 还蛮有意思的
file:///Users/zoe/Desktop/screenshots/Screen%20Shot%202017-10-03%20at%203.33.36%20PM.png

有谁知道为什么我第一个exception catch之后command是重复了 但是是在error message之前 但是后面再catch就没有问题了

四五天前做的了，忘记了当时的思路了~唉，以后还是要写下来

fighting

交作业啦交作业啦，交完了健身！！！

学习了exception的构造，和try catch的使用，感觉还不错
肉眼看bug的能力还不够哇