Java Math - Find Imaginary Number

Nov 2, 2014

I am doing this math for my assignment where you have to find the imaginary number.

double dem = (b*b-4*a*c)*-1;
double dem2 = Math.sqrt(dem);
realPart = (-b/(2*a));
imagine = (dem2)/(2*a);
imagineneg = (dem2)/(2*a);

So basically I am trying to get it that the number inside the square root isnt negative. So lets say I enter a: 1, b: -1, c: 4.25. When you do the discriminant it would be -16 but I want that to be positive so I multiple it by -1 (thats the dem part). Then I sqaure root the whatever the answer is and then go to the imagine and imagineneg part where you find the imaginary number.

My problem is that instead of it being -16*-1 to get 16, some how I get 15.

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Java Program - Track Position Of Imaginary Ball As It Bounces Around Imaginary Box

Oct 3, 2014

I am working on a program that asks me to track the position of an imaginary ball as it bounces around an imaginary box. The user gives me input for the starting position of the ball (x,y), the bottom-left boundaries of the box (xl, yl), the top right boundaries (xr, yr) and the angle. The program then needs to find where the ball will hit the box, and then print that location and find the new angle for the next point. My program currently works in most cases if the angle is less than pi.

Here is my code

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[Code] .....

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Java program : For this assignment you are going to write code for the following class:

MathOnThreeNumbers

Here are the specifications of class MathOnThreeNumbers:

Methods of class MathOnThreeNumbers:

1. inputThreeNumbers
2. getAverage
3. getSum
4. getNumberOne
5. getNumberTwo
6. getNumberThree

Constructor of class MathOnThreeNumbers

write a constructor that initializes the first, second, and three numbers to 1, 2, and 3 respectively.

Specs for the methods methods:

1.
name: inputThreeNumbers
accessibilty: public
arguments: none
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2.
name: getAverage
accessibilty: public
arguments: none
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3.
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accessibilty: public
arguments: none
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4.
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arguments: none
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5.
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arguments: none
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6.
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arguments: none
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Here is an example of how the class MathOnThreeNumbers works. The following code produces the output displayed after the code.

MathOnThreeNumbers mm = new MathOnThreeNumbers();
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System.out.println("second: " + mm.getNumberTwo());
System.out.println("third: " + mm.getNumberThree());
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[Code] .....

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[Code] .....

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^
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So i decided to declare the

int searchFor
as
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Also,when i add a SOP line after the label search: it shows the error

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^

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Java Code:

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