Java String methods

/**
 * @author lautturi.com 
 * Java example: String methods example
 */

import java.util.*;

public class Lautturi {
	public static void main(String[] args) {
		String first = "HELLO"; 
		String last = new String(" java");
		String full = first.concat(" ").concat(last); 
		System.out.println(first); // HELLO
		System.out.println(last); //  java
		System.out.println(last.trim()); // java
		System.out.println(full); // HELLO  java
		System.out.println(first.charAt(0)); // H
		System.out.println(last.charAt(last.length() - 1)); // a
		System.out.println(first.toLowerCase()); // hello
		System.out.println(last.toUpperCase()); //  JAVA
		System.out.println(first.equals(last)); // false
		System.out.println(full.substring(2,8)); // LLO  j
		System.out.println(full.substring(full.indexOf(' ') + 1)); //  java
		System.out.println(full.indexOf('a')); // 8
		System.out.println(full.lastIndexOf('a')); // 10
		System.out.println(first.replace('v', 'x')); // HELLO
	}
}