How to convert List to String without commas and brackets [closed]

Question

Suppose array list is already created with elements a, b and c in them. but i only want to print the elements without the brackets and commas. would this work?

for(int i=0;i<list.size();i++){
String word = list.get(i);
String result = word + " ";
}
System.out.print(result);

Answer 1

You can do it easily using replaceAll method like

 String result = myList.toString().replaceAll("[\\[\\]]", "").replaceAll(",", " ");

Try the below program. Hope it meets your needs.

List<String> myList = new ArrayList<String>();
        myList.add("a");
        myList.add("b");
        myList.add("c");
        String result = myList.toString().replaceAll("[\\[\\]]", "").replaceAll(",", " ");
        System.out.println(result);

Answer 2

No it won't work.

• Result needs to be outside the loop
• You need to append to result rather than overwriting it each time

Fixed.

List<String> list = Arrays.asList("horse", "apples");

String result = "";   //<== needs to be outside the loop
for (int i = 0; i < list.size(); i++) {
    String word = list.get(i);   
    result = result + word + " ";  // <== need to append 
}
System.out.print(result);

Other things to bare in mind

• Enhanced for loop is easier to use in this case
• StringBuilder better for massive lists
• Java 8 String.join() can do this in one line without the trailing space
• You don't need intermediate variable for word

For example

for (String item : list) {
    result += item + " ";
}

Or just use String.join

String.join(" ", list);