java integer division to float

/**
 * @author lautturi.com 
 * Java example: java integer division to float
 */

import java.util.*;

public class Lautturi {
    
	public static void main(String[] args) {

		int a = 20;
		int b = 3;
		float s1 = a/b;
		float s2 = (float)a/b;
		
		System.out.println(s1);
		System.out.println(s2);

	}
}

output:

6.0
6.6666665