Operators

[Ikpefua Jacob-Obinyan]

Source: Sun Certified Programmer for Java 6 Study Guide
Pages: 313/314
Authors: Kathy Sierra & Bert Bates

public class Comp2 {
    public static void main(String[] args) {
        float f1 = 2.3f;
        float[][] f2 = {{42.0f}, {1.7f,2.3f},{2.6f,2.7f}};
        float[] f3 = {2.7f};
        Long x =  42L;
        if(x == f2[0][0])
        System.out.println("true");
        
    }

}    

The above code compiles and runs fine,
Im simply asking for a brief explanation
on how the if statement resulted as "true"
bearing in mind that Long and float are
diferrent Types.
Thank you for your help.

[Pravin Shirke]

hi Ikpefua,
At line no: 7 in your code. the JVM will automatically do widening conversion of long to float and will compare both the values.
hence the println prints true.

[Abimaran Kugathasan]

SearchFirst, this is discussed recently.

And this is called Numeric promotion, have a look on this

[Ikpefua Jacob-Obinyan]

Pravin Shirke wrote:hi Ikpefua,
At line no: 7 in your code. the JVM will automatically do widening conversion of long to float and will compare both the values.
hence the println prints true.

Hi Pravin, thanks a lot for your explanation.