how to initialize a string in java

/**
 * @author lautturi.com
 * Java example: initialize a string in java
 */

import java.util.*;

public class Lautturi {

	public static void main(String[] args) {

		String str1 ="hello world"; // declare and initialize a string in java
		
		String str2 = new String(); 
		str2 = "hello java"; // initialize a string in java
		
		System.out.println(str1);
		System.out.println(str2);
	}
}