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Compile error in Java

  • 24-04-2011 8:13am
    #1
    Gerb68
    Registered Users, Registered Users 2 Posts: 266 ✭✭


    Hi
    Can anybody help me with this error...

    java uses unchecked or unsafe operations.
    Note: Recompile with -Xlint:unchecked for details.

    Tool completed successfully

    I'm trying to include a vector in a test program and I'm new to vectors.

    As I have searched elsewhere I am not sure if its a general error or if its specific to a certain piece of code.

    Any help appreciated.


Comments

  • #2
    croo
    Moderators, Technology & Internet Moderators Posts: 1,336 Mod ✭✭✭✭croo


    You know... that is the type of thing google can answer in a few seconds. It's a valuable tool you should use when learning.
    Look carefully at how vectors use generics!


  • #3
    unknownlegend
    Registered Users, Registered Users 2 Posts: 375 ✭✭unknownlegend


    croo wrote: »
    You know... that is the type of thing google can answer in a few seconds. It's a valuable tool you should use when learning.
    Look carefully at how vectors use generics!

    This! Stackoverflow has your answer, research generics in a bit more detail. Not being facetious at all but harnessing Google for problems such as this will greatly help you improve your skills.


  • #4
    Gerb68
    Registered Users, Registered Users 2 Posts: 266 ✭✭Gerb68


    As I stated I have been googling and all I can find is that it may mean that I'm using a java 5 compiler to compile code that is written for java 4.

    I find when googling java issues it can be very difficult as results may include code that I have not yet covered. This can get confusing and can lead you away from the origional problem.

    I will continue to google, Thanx for the advice.


  • #5
    unknownlegend
    Registered Users, Registered Users 2 Posts: 375 ✭✭unknownlegend


    Can you check if that specific bit of code you're trying to compile has been.deprecated or similar?


  • #6
    Kidchameleon
    Closed Accounts Posts: 5,482 ✭✭✭Kidchameleon


    I get this when I de-serialise an object, doesn't seem to cause any problems. My program runs fine...


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  • #7
    Gerb68
    Registered Users, Registered Users 2 Posts: 266 ✭✭Gerb68


    (deleted)


  • #8
    croo
    Moderators, Technology & Internet Moderators Posts: 1,336 Mod ✭✭✭✭croo


    Did you look at the topic of generics and how it's used in collections?
    Out of curiosity, did you follow the instructions and Recompile with -Xlint?

    This is just a warning so you should be able to run & test your code, but it is instructional to understand what the compiler is telling you!

    Instead of casting the BankAccounts to objects try defining the vector as:
    Vector<BankAccount> myBank = new Vector<BankAccount>(5);
    and just adding vector elements of type BankAccount!


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