Concatenating elements in an array to a string

Question

I\'m confused a bit. I couldn\'t find the answer anywhere ;(

I\'ve got an String array:

String[] arr = [\"1\", \"2\", \"3\"];

then

Answer 1

Arrays.toString(arr);

output is [1,2,3] and you storing it to your string . and printing it so you get output [1,2,3].

If you want to get output 123 try this:

public static void main(String[] args) {
    String[] arr= {"1","2","3"};
    String output ="";
    for(String str: arr)
        output=output+str;
    System.out.println(output);


}

Output:

123