Swapping Characters in a String in Java

Question

Given the above excerpt from a Java code, I need to modify the code such that it could recursively swap pairs of the content of the string variable, \"locationAddress\". Please

Answer 1

A solution using Stream:

String input = "abcdefghijk";
String swapped = IntStream.range(0, input.length())
        .map(i -> i % 2 == 0 ? i == input.length() - 1 ? i : i + 1 : i - 1)
        .mapToObj(input::charAt)
        .map(String::valueOf)
        .collect(Collectors.joining());
System.out.println(swapped); // badcfehgjik

The swapping is driven by the index i. If i is even and there is a next (i+1) character then it's used. If i is odd then the previous (i-1) character is used.