How to initialize all the elements of an array to any specific value in java

Question

In C C   we have memset   function which can fulfill my wish but in Java how can i initialize all the elements to a specific value  Whenever we write int   array new int 10     this simply initialize an array of size 10 having all elements equal to zero  I just want to change this initialization integer for one of my array  i e  I want to initialize an array which has all elements equal to -1  Otherwise I have to put a for loop just after initialization  which ranges from index 0 to index size-1 and inside that loop  I am assigning element to -1  Below is the code for more understanding-      int   array   new int 10       for  int i   0  i  lt  size  i              array i    -1          Am i going correct  Is there any other way for the same

User · Answer

You can use Arrays fill array  -1

User · Answer

You could do this if it s short   int   array    -1 -1 -1 -1 -1 -1 -1 -1 -1 -1    but that gets bad for more than just a few   Easier would be a for loop     int   myArray   new int 10     for  int i   0  i  lt  array length  i           myArray i    -1    Edit   I also like the Arrays fill   option other people have mentioned

User · Answer

For Lists you can use  Collections fill arrayList   -

User · Answer

It is also possible with Java 8 streams   int   a   IntStream generate    - gt  value  limit count  toArray      Probably  not the most efficient way to do the job  however

User · Answer

Using Java 8  you can simply use ncopies of Collections class   Object   arrays   Collections nCopies size  object  stream   toArray      In your case it will be   Integer   arrays   Collections nCopies 10  Integer valueOf 1   stream   toArray Integer    new       Here is a detailed answer of a similar case of yours

User · Answer

Evidently you can use  Arrays fill    The way you have it done also works though

User · Answer

If it s a primitive type  you can use Arrays fill     Arrays fill array  -1      Incidentally  memset in C or C   is only of any real use for arrays of char

User · Answer

java util Arrays fill

User · Answer

There s also  int   array    -1  -1  -1  -1  -1  -1  -1  -1  -1  -1

User · Answer

Have you tried the Arrays fill function

[java] How to initialize all the elements of an array to any specific value in java

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