Answer:
d. public myClass( ) {. . .}
Explanation:
A constructor is a special method that is called when an object of a class is created. It is also used to initialize the instance variables of the given class. A class may have one or more constructors provided that these constructors have different signatures. A class that does not have a constructor explicitly defined has a default parameterless constructor.
Having said these about a constructor, a few other things are worth to be noted by a constructor.
i. In Java, a constructor has the same name as the name of its class.
For example, in the given class <em>myClass</em>, the constructor(s) should also have the name <em>myClass</em>.
ii. A constructor does not have a return value. It is therefore wrong to write a constructor like this:
<em>public void myClass(){...}</em>
This makes option a incorrect.
iii. When a constructor with parameters is defined, the default parameterless constructor is overridden. This might break the code if some other parts of the program depend on this constructor. So it is advisable to always explicitly write the default parameterless constructor.
This makes option d a correct option.
Other options b and c may also be correct but there is no additional information in the question to help establish or justify that.
Here you go,
import java.util.Scanner;
import java.util.Random;
public class OrderCalculator{
public static void main(String[] args){
float x, y, z, semi, area;
Scanner in = new Scanner(System.in);
System.out.print("Enter the 3 sides: ");
x = in.nextFloat();
y = in.nextFloat();
z = in.nextFloat();
semi = (float) ((x + y + z) / 2.0);
area = (float) Math.sqrt(semi * (semi - x) * (semi - y) * (semi - z));
System.out.printf("The area is: %.3f\n", area);
}
}
LEFT SIDE :
Layer menu
Layer filters
Layer groups
Link layers
BOTTOM :
Layer effects
Layer menu
Visibility
RIGHT SIDE :
Add new layer
Opacity
Fill opacity
In *nix, the ping command keeps on sending ICMP packets unless the "-c" (count) argument is passed. In Windows, ping defaults to 4 ICMP packets.
