How to convert String to String array in Java?

To convert String to String array in Java, do this: string.split("").

Here's how you do it:

String string = "Hello World!";
String[] characters = string.split("");

// [H, e, l, l, o,  , W, o, r, l, d, !]
System.out.println(java.util.Arrays.toString(characters));

String to a one-element array containing this String

If you actually meant putting a String into an array, then here's how you do it:

String string = "Hello World!";
String[] stringInArray = new String[] { string };

// [Hello World!]
System.out.println(java.util.Arrays.toString(stringInArray));