Extending Calculator - Added Function To Square Numbers

Feb 14, 2014

I am new to java and during my classes we built a basic calculator. I want to extend my calculator and added function to square numbers.Here is my program:

Java Code:

package calculator02;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

[code]...

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I'm trying to create a cursor for a game that moves square by square. While it will move to the next square, though, it leaves the image of the previous cursor on the last square it was on.

As a visual explanation, this is what the program looks like on launch:

This is what it's suppose to look like after you press the right arrow key once (made by forcibly changing launch coordinates):

And this is what it actually looks like after you press the right arrow key once:

Here is the code for the program:

package cursortest;
import javax.swing.*;
import java.awt.*;
import javax.imageio.*;
import java.io.*;
import java.awt.event.*;
public class CursorTest extends JPanel implements KeyListener{

[Code] ......

I'm fully aware that I could just use g.clearRect on the area and remove it for sure, but I know for a fact I shouldn't have to as I have another program I made a long time ago that tried to do something similar without needing to resort to that.

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import java.awt.BorderLayout;
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import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
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[Code] .....

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public static int permutation[];
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[Code] ......

So basically I'm wanting the program to make a randomized list of numbers from the number of items I pass to the Permute method with no duplicates. I'm having some level of success with what I have written, as it gives me a randomized list when printing the output, but for some reason the first for statement in code never terminates fully, but instead runs indefinitely when generating the last integer.

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My verify method also always returns false. So I'm given three classes to begin with. Calculator, Expression, and InfixExpression and they are listed below.

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My evaluate() method works for most calculations but when it needs to return a negative value it just returns the positive equivalent.

Also, my verify method always returns false and I can't pinpoint why.

Here's my current code. Some things are commented out for debugging purposes.

import java.util.Scanner;
/**
* Simple calculator that reads infix expressions and evaluates them.
*/
public class Calculator
{
public static void main(String[] args) {
Scanner input = new Scanner(System.in);

[Code] .....

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this is my code

public class Calculator extends javax.swing.JFrame {
private double TEMP;
private double SolveTEMP;
Boolean addBool = false;
Boolean subBool = false;
Boolean divBool = false;
Boolean mulBool = false;
String display = "";

[Code] ....

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HTML Code:
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Error message at compile time:

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{//Constructor
^
required: String
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[code]...

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[code]...

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The link shows an image that illustrates the problem. [URL]

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I have attached my complete project....

Attached File(s)

Assignment 4.pdf (247.05K)
Assignment 4.zip (235.81K)

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