StringBuilderExercises

import java.util.Scanner;

public class ArrayListExercises {

	public static void main(String[] args) {
		// Problem One
		StringBuilder text = new StringBuilder("ABCDEFG");
		System.out.println(text);
		// Deletes DE
		text.delete(3, 5);
		System.out.println(text);
		text.insert(3, "DE");
		System.out.println(text);

		// at E, puts in XYZ
		text.insert(4, "XYZ");
		System.out.println(text);
		text.delete(4, 8);
		text.insert(4, "E");
		System.out.println(text);

		// replaces C to F with XYZ
		text.replace(2, 7, "XYZ");
		System.out.println(text);
		text.replace(2, 5, "CDEFG");
		System.out.println(text);

		// Changes B to X
		text.setCharAt(1, 'X');
		// Deletes C
		text.deleteCharAt(2);
		// Sets F to Y
		text.setCharAt(4, 'Y');
		// Flips the Text
		text.reverse();
		System.out.println(text);
		text.reverse();
		text.setCharAt(4, 'F');
		text.insert(2, 'C');
		text.setCharAt(1, 'B');
		System.out.println(text);

		// Problem Two
		StringBuilder strBuild = new StringBuilder(10);
		// Capacity has been set at 10, but the length is 0, all null
		System.out.println(strBuild.length() + " " + strBuild.capacity());

		// Problem Three
		String sentence = "He wore a blue shirt and black pants.";
		System.out.println(sentence);
		String newStr = searchAndReplace(sentence, "blue", "black");
		System.out.println(newStr);

		// Problem Four
		Scanner keyboard = new Scanner(System.in);
		String comparisonLine = "abcdefghijklmnopqrstuvwxyz";
		String conversionLine = "22233344455566677778889999";
		StringBuilder convertedWord = new StringBuilder();
		System.out.println("What is the word you want to convert?");
		StringBuilder wordConversion = new StringBuilder(keyboard.next().toLowerCase());
		for (int index = 0; index < wordConversion.length(); index++) {
			// Gets integer value of the character
			convertedWord.append(conversionLine.charAt((comparisonLine.indexOf(wordConversion.charAt(index)))));
		}
		System.out.println(convertedWord);

		// Problem Five
		System.out.println("What is the Word you want to encode?");
		String word = (keyboard.next().toUpperCase());
		String encodedWord = encodeWord(word);
		System.out.println(encodedWord);

	}

	// Method for Problem Three
	private static String searchAndReplace(String sentence, String search, String replace) {
		StringBuilder newSentence = new StringBuilder(sentence);
		while (newSentence.indexOf(search) != -1) {
			newSentence.replace(newSentence.indexOf(search), replace.length() + newSentence.indexOf(search) - 1,
					replace);
		}
		return newSentence.toString();
	}

	// Method for Problem Five
	private static String encodeWord(String word) {
		StringBuilder encodedWord = new StringBuilder();
		String codeLine = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
		for (int index = 0; index < word.length(); index++) {
			encodedWord.append(codeLine.indexOf(word.charAt(index)) + "-");
		}
		return encodedWord.toString();
	}
}