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  1. #1
    ravi1912 is offline Member
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    Default array of class objects

    Hey i want to know how to create array of object in java

    but i always got an error NullPointerException


    plz suggest a better example

  2. #2
    JosAH's Avatar
    JosAH is offline Moderator
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    Quote Originally Posted by ravi1912 View Post
    Hey i want to know how to create array of object in java

    but i always got an error NullPointerException


    plz suggest a better example
    Declaring an array of objects doesn't automagically give you one in Java; creating an array of objects doesn't automagically populate it with objects automagically in Java; you have to do that yourself, e.g.

    Java Code:
    MyClass[] array; // declare an array
    array= new MyClass[42]; // create it
    array[0]= new MyClass( ... );
    array[1]= new MyClass( ... ); // populate it
    Java allows a handy shorthand form for the above:

    Java Code:
    MyClass[] array= { new MyClass( ... ), new MyClass( ... ) };
    This form defines, creates and populates an array that is able to store the elements mentioned in the (so called) initializer list.

    kind regards,

    Jos
    cenosillicaphobia: the fear for an empty beer glass

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