Java array assignment multiple values

Question

I have a Java array defined already e g   float   values   new float 3     I would like to do something like this further on in the code   values    0 1f  0 2f  0 3f     But that gives me a compile error  Is there a nicer way to define multiple values at once  rather than doing this    values 0    0 1f  values 1    0 2f  values 2    0 3f    Thanks

User · Answer

On declaration you can do the following   float   values    0 1f  0 2f  0 3f     When the field is already defined  try this   values   new float    0 1f  0 2f  0 3f     Be aware that also the second version creates a new array  If values was the only reference to an already existing field  it becomes eligible for garbage collection

User · Answer

You may use a local variable  like       float   values   new float 3       float   v    0 1f  0 2f  0 3f       float   values   v

User · Answer

int a       2  6  8  5  4  3     int b       2  3  4  7      if you take float number then you take float and it s your choice  this is very good way to show array elements

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for example i tried all above for characters it fails but that worked for me    reserved a pointer then assign values  char A    A   new char    a    b    a    c    d    d    e    f    q    r

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This should work  but is slower and feels wrong  System arraycopy new float         0  values  0  3

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public class arrayFloats         public static void main  String    args           float    Values   new float 3           float Incre   0 1f          int Count   0           for  Count   0 Count lt 3  Count                 Values  Count    Incre   0 0f            Incre    0 1f            System out println  Values      Count            Values  Count                                 OUTPUT    Values  0    0 1   Values  1    0 2   Values  2    0 3   This isn t the all and be all of assigning values to a specific array  Since I ve seen the sample was 0 1 - 0 3 you could do it this way  This method is very useful if you re designing charts and graphs  You can have the x-value incremented by 0 1 until nth time   Or you want to design some grid of some sort

User · Answer

Java does not provide a construct that will assign of multiple values to an existing array s elements   The initializer syntaxes can ONLY be used when creation a new array object   This can be at the point of declaration  or later on   But either way  the initializer is initializing a new array object  not updating an existing one

User · Answer

values   new float     0 1f  0 2f  0 3f

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If you know the values at compile time you can do    float   values    0 1f  0 2f  0 3f     There is no way to do that if values are variables in runtime

User · Answer

Yes   float   values    0 1f  0 2f  0 3f     This syntax is only permissible in an initializer  You cannot use it in an assignment  where the following is the best you can do   values   new float 3     or  values   new float    0 1f  0 2f  0 3f     Trying to find a reference in the language spec for this  but it s as unreadable as ever  Anyone else find one

[java] Java array assignment (multiple values)

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