When declaring a JAVA string array, how do I stabilize the size and declare it?

For example, determine the size when declaring a string array variable (String[5]), as shown below I have to declare it. String[] apple = new String[5];

But what I need is not an array of strings of a given size 1 character for a specific character, 2 characters for a specific character, etc The size of the arrangement needs to be determined as much as it is put in.