compare doubles in java

/**
 * @author lautturi.com
 * Java example: compare doubles in java
 */

import java.util.*;
import java.math.BigDecimal;

public class Lautturi {

	public static void main(String[] args) {

		double d1 = 3.10;
		double d2 = 3.100;

		System.out.println(d1 == d2);
		
	}
}

output:

true