면접문제 수집(12)(문자열 반전)

문자열 반전

package StingSub;

import java.util.ArrayDeque;
import java.util.Deque;
import java.util.Stack;

public class ReverseStr {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		System.out.println(reverseStack("wokessd.cm .cok .ddj dd*&4 dlk"));
		System.out.println(reverseDeque("wokessd.cm .cok .ddj dd*&4 dlk"));
		System.out.println(reverse("wokessd.cm .cok .ddj dd*&4 dlk", "cok"));
		System.out.println(reverseByInfo("wokessd.cm .cok .ddj dd*&4 dlk"));
	}

	public static String reverseStack(String stringInfo) {

		if (stringInfo == null) {
			throw new NullPointerException("info is null.");
		}

		StringBuffer buffer = new StringBuffer("");

		Stack<Character> stack = new Stack<Character>();

		for (int i = 0; i < stringInfo.length(); i++) {
			stack.push(stringInfo.charAt(i));
		}
		while (!stack.empty()) {
			buffer.append(stack.pop());
		}
		return buffer.toString();
	}

	public static String reverseDeque(String stringInfo) {

		if (stringInfo == null) {
			throw new NullPointerException("info is null.");
		}

		StringBuffer buffer = new StringBuffer("");

		Deque<Character> deque = new ArrayDeque<Character>();
		for (int i = 0; i < stringInfo.length(); i++) {
			deque.addFirst(stringInfo.charAt(i));
		}
		while (!deque.isEmpty()) {
			buffer.append(deque.removeFirst());
		}
		return buffer.toString();
	}

	public static String reverse(String stringInfo, String noReverse) {

		if (stringInfo == null || noReverse == null) {
			throw new NullPointerException("info is null.");
		}
		StringBuffer buffer = new StringBuffer("");
		Stack<Character> stack = new Stack<Character>();
		boolean iscontain = false;
		for (int i = 0; i < stringInfo.length(); i++) {
			iscontain = true;
			for (int j = 0; j < noReverse.length(); j++) {
				if ((i + j) > stringInfo.length()
						|| (stringInfo.charAt(i + j) != noReverse.charAt(j))) {
					iscontain = false;
					break;
				}
			}
			if (iscontain) {
				for (int j = noReverse.length() - 1; j >= 0; j--) {
					stack.push(noReverse.charAt(j));
				}
				i += noReverse.length() - 1;
			} else {
				stack.push(stringInfo.charAt(i));
			}
		}

		while (!stack.empty()) {
			buffer.append(stack.pop());
		}
		return buffer.toString();
	}

	public static String reverseByInfo(String stringInfo) {

		if (stringInfo == null) {
			throw new NullPointerException("info is null.");
		}

		StringBuffer buffer = new StringBuffer("");

		Stack<Character> stack = new Stack<Character>();

		for (int i = 0; i < stringInfo.length(); i++) {
			stack.push(stringInfo.charAt(i));
		}
		while (!stack.empty()) {
			buffer.append(stack.pop());
		}
		String reverseall = buffer.toString();
		buffer.delete(0, buffer.length());
		for (int i = 0; i < reverseall.length(); i++) {
			if (reverseall.charAt(i) == ' ' || reverseall.charAt(i) == '.') {
				while (!stack.empty()) {
					buffer.append(stack.pop());
				}
				buffer.append(reverseall.charAt(i));
			} else {
				stack.push(reverseall.charAt(i));
			}
		}
		while (!stack.empty()) {
			buffer.append(stack.pop());
		}
		return buffer.toString();
	}
}