Thread: Problem with School Assignment.

Below is an attachment with two pages. "The UML diagram and instructions are on there also, so you can understand" *i need help with ShipTest.java, cause I can't get it to compile, mainly cause I haven't gotten much written cause I haven't complete Ship.java all the way.




So far, I have Ship.java written, but not 100% correctly, because I used bits an pieces from code I have written to build it up so it would compile, the returns are not exactly right.
The only real problem I am having with it, is the "double" 'timeToCrossEnglishChannel'.

/**************************************************
* Name: Matt Spencer
* Assignment: A04
**************************************************/
 
public class Ship
{
	//fields
	private String name;
	private double speed;
 
	//constructors
	public Ship(String bName, double s)
	{
		name = bName;
		setSpeed(s);
	}
 
	//methods
	public String getName()
	{
		return name;
	}
 
	public double getSpeed()
	{
		return speed;
	}
 
	public void setName(String newName)
	{
		name = newName;
	}
 
	public void setSpeed(double s)
	{
		if (s >= 0)
		speed = s;
	}
 
	public double timeToCrossEnglishChannel(double s)
	{
		return speed * 2;
 
	}
 
 
 
}

ShipTest.java is much worst, I can't figure out why it won't compile, it keeps putting an error on my "=" sign, for the line Ship myShip = new Ship();

/**************************************************
* Name: Matt Spencer
* Assignment: A04
**************************************************/
import java.util.Scanner;
public class ShipTest
{
	public static void main(String[] args)
	{	
		Ship myShip = new Ship();
 
		myShip.setName("Rob Roy");	
 
 
	}
}

thanks for any help.

Well it is pointing at the "new". So your saying I need a new constructor on my ShipTest page.

I have tried making a new constructor, but I just get more errors.

OH my bizzle.

your talking about my

 
public Ship(String bName, double s)
	{
		name = bName;
		setSpeed(s);
	}

your saying I should do a blank one like:

public Ship()
{
 
}

A Ha!!

Your a genius!!!

The first time i played minecraft I stayed up all night and played all the next day, I had fun building big walls, and made cool "yellow brick" roads that go everywhere.

Yeah I got the ShipTest to compile, and so I will work my way through some more.

The only other problem i had with Ship.java., was the return values for the set's and EnglishChannel.

The return values for the setName and setSpeed might not get my intended answers in the end, but the EnglishChannel is a doosy.


I need to have a "Speed", and based on that speed I need to translate it to Knots, and calculate how long it would take to get 21 miles(assuming your speed is a constant)

This is our first assignment where we had to do the "Class" and "ClassTest", in the past we have always had completed "Class" and then had to write the "ClassTests" from scratch.

According to the paper, Paddle Streamer will got 21 miles / 6 knots = 3.5, according to output labeled, it will equal 3, so I will have to calculate to no decimals.

For the Hover Craft we got 21 miles / 60 knots = .35 , according to the output labeled, it will equal .3, so i will have to calculate to 1 decimal place.



Should I make speed a variable like S for the return of setSpeed, so that the EnglishCrossing will be like "return 21 / s;" and then later change the variable based on which ship?

OH, thanks man. Yeah I have been sick this whole week, so I didn't get on the internet much.

But I think I am getting closer. I just have the hardest time writing code that I haven't before. Especially since I haven't got much experience.


I keep track of all the code I write, so I can look at them for reference. Each of my assignments end up being fully new and harder than ever.