/*
 * Snippets for Chapt 24
 */
import java.util.*;

public class Chapt24Snippets {

	public static void main(String[] args) {
		test1( );
		getWordsTest( );
		test2();
	}
	
	public static void test2( ) {
		ArrayList a = new ArrayList();
		a.add( new String( "Bob" ) );		// [Bob]
		a.add( new String( "Carol" ) );		// [Bob, Carol]
		a.add( 1, new String( "Ted" ) );	// now [Bob, Ted, Carol]
		System.out.println( a.size( ) );	// should be 3
		// String x = a.get( 2 );				// illegal: cannot convert Object to String
		String y = (String) a.get( 2 );		// okay: returns "Carol"
		System.out.println( y );
		a.clear( );							// clear it out
		System.out.println( a.size( ) );	// should be 0
	}
	
	public static void test1( ) {
		char[ ] c = { 'H', 'e', 'l', 'l', 'o' };
		String s = "";
		for ( int i = 0; i < c.length; i++ ) {
			s += c[i];
			System.out.println( s );
		}
		StringBuffer b = new StringBuffer( );
		b.append( 99.5 );
		b.append( '%' );
		b.append( "pure" );
		System.out.println( b );
	}
	
	public static void getWordsTest( ) {
		String s1 = "Do you wake up in the morning feeling sleepy and grumpy?";
		System.out.println ( "[" + getWords( s1 ) + "]" );
		String s2 = "Then, you must be Snow White.";
		System.out.println ( "[" + getWords( s2 ) + "]" );
	}

	/** Removes punctuation, maps to lower case, and returns a
	 * string with the remaining words.
	 * @param s	The input string.
	 * @return	A string containing just the words in lower case.
	 */
	public static String getWords( String s ) {
		String[ ] words = s.split( "[ ,.?]+");
		StringBuffer buffer = new StringBuffer( );
		for ( int i = 0; i < words.length; i++ ) {
			buffer.append( words[i].toLowerCase( ) );
			if ( i < words.length-1 ) buffer.append( " " );
		}
		return String.valueOf( buffer );
	}
}