creating array without declaring the size - java

Question

i ve digging around about the same issue but i couldn t find the same as i had   i want to create an array without declaring the size because i don t know how it will be    to clear the issue i d like to give you the code that i m looking up for  public class t    private int x     private int counter 0   public void add int num        this x this counter    num     this counter           as you see the user could use the add function to add element to the array 10000 times or only once so it s unknown size

User · Answer

You might be looking for a List  Either LinkedList or ArrayList are good classes to take a look at  You can then call toArray   to get the list as an array

User · Answer

How about this       private Object element     new Object

User · Answer

Using Java util ArrayList or LinkedList is the usual way of doing this  With arrays that s not possible as I know   Example   List lt Float gt  unindexedVectors   new ArrayList lt Float gt      unindexedVectors add 2 22f    unindexedVectors get 2

User · Answer

I think what you really want is an ArrayList or Vector   Arrays in Java are not like those in Javascript

User · Answer

Once the array size is fixed while running the program  it s size can t be changed further  So better go for ArrayList while dealing with dynamic arrays

User · Answer

As others have said  use ArrayList  Here s how   public class t    private List lt Integer gt  x   new ArrayList lt Integer gt       public void add int num        this x add num          As you can see  your add method just calls the ArrayList s add method  This is only useful if your variable is private  which it is

[java] creating array without declaring the size - java

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