How to initialize a dynamic array in java?

java dynamic-arrays
lock picture lock · Sep 7, 2010 · Viewed 26k times · Source

If I have a class that needs to return an array of strings of variable dimension (and that dimension could only be determined upon running some method of the class), how do I declare the dynamic array in my class' constructor?

If the question wasn't clear enough,

in php we could simply declare an array of strings as $my_string_array = array(); and add elements to it by $my_string_array[] = "New value";

What is the above code equivalent then in java?

Answer

Tom Neyland picture Tom Neyland · Sep 7, 2010

You will want to look into the java.util package, specifically the ArrayList class. It has methods such as .add() .remove() .indexof() .contains() .toArray(), and more.

Related questions

How can I dynamically add items to a Java array?

In PHP, you can dynamically add elements to arrays by the following: $x = new Array(); $x[] = 1; $x[] = 2; After this, $x would be an array like this: {1,2}. Is there a way to do something similar in Java?

Read More
How do I convert a String to an int in Java?

How can I convert a String to an int in Java? My String contains only numbers, and I want to return the number it represents. For example, given the string "1234" the result should be the number 1234.

Read More
How do I declare and initialize an array in Java?

How do I declare and initialize an array in Java?

Read More