Java convert string to uppercase

/**
 * @author lautturi.com
 * Java example: Java touppercase and charat example
 */

import java.util.*;

public class Lautturi {

	public static void main(String[] args) {
		
		String str = "hello lautturi!";
		String newStr = Character.toUpperCase(str.charAt(0)) + str.substring(1);
		System.out.println(newStr);
		
		newStr = ""; 
		for(int i=0;i<str.length();i++) {
			newStr = newStr + Character.toUpperCase(str.charAt(i));
        }
		System.out.println(newStr);
		
	}

}

output:

Hello lautturi!
HELLO LAUTTURI!