java convert string to int

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


import java.util.*;

public class Lautturi {

    
	public static void main(String[] args) {

		String str = "123";
		int num = Integer.parseInt(str);	

		System.out.println(num);
	  	System.out.println(str);

	}
}

output:

123
123