Java Program to Reverse String But Not Special Characters - Java Inspires

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Java Program to Reverse String But Not Special Characters - Java Inspires

package basics;

import java.util.ArrayList;
import java.util.List;

public class MainApp {

	public static void main(String[] args) {

		String s1 = "AA&D#U";
		// expected is UD&A#A

		char[] chars = s1.toCharArray();
		List<Character> charsS = new ArrayList<Character>();
		List<Character> sPcharsS = new ArrayList<Character>();
		for (Character c : chars) {
			if (Character.isAlphabetic(c)) {
				charsS.add(c);
			} else {
				sPcharsS.add(c);
			}
		}
		char[] rev = new char[s1.length()];
		for (int i = 0; i < s1.length(); i++) {
			if (Character.isAlphabetic(chars[i])) {
				rev[i] = charsS.get(charsS.size() - 1);
				charsS.remove(charsS.size() - 1);
			} else {
				rev[i] = sPcharsS.get(0);
				sPcharsS.remove(0);
			}
		}

		System.out.println(String.copyValueOf(rev));

	}

}

Output:

UD&A#A

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