Question

I have an ArrayList and I need to convert it to one String.

Each value in the String will be inside mark and will be separated by comma something like this:

ArrayList list = [a,b,c]

String s = " ’a’,’b’,’c’ ";

I am looking for efficient solution .

Answer 1

You can follow these steps: –

• Create an empty StringBuilder instance

  StringBuilder builder = new StringBuilder();
  

• Iterate over your list

• For each element, append the representation of each element to your StringBuilder instance

  builder.append("'").append(eachElement).append("', ");
  

• Now, since there would be a last comma left, you need to remove that. You can use StringBuilder.replace() to remove the last character.

You can take a look at documentation of StringBuilder to know more about various methods you can use.