Concatenate two strings.

public class Test {

    public static void main(String[] args) {
        String string1 = "a b c d e f ";
        String string2 = "g h i j k l";

        String ans = stringConcatenate(string1, string2);
        System.out.println("after concatenate both String '" + string1 + "' & '" + string2 + "' : " + ans);
    }

    private static String stringConcatenate(String string1, String string2) {
        String ans = string1 + string2;
        return ans;
    }
}