Brad Cantrell

Ah you're right, thanks Ulf.

Ulf- This is what I get when I run the program, I just think its strange that each person is only getting a response from one person of the opposite sex when there are two people of the opposite sex that they should get a response from.

John
John fit: 0.0
Mary fit: 0.0
George fit: 0.0
Ellen fit: 0.060000000000000005
Mary
John fit: 0.0
Mary fit: 0.0
George fit: 0.06000000000000001
Ellen fit: 0.0
George
John fit: 0.0
Mary fit: 0.0
George fit: 0.0
Ellen fit: 0.30000000000000004
Ellen
John fit: 0.060000000000000005
Mary fit: 0.0
George fit: 0.0
Ellen fit: 0.0

This is a dating program Im making that compares profiles of 4 people on a scale of 0.0 to 1.0. The data the people have is their name, sex, desired sex of mate which has to be mutual or they automatially get 0.0, otherwise they are compared with their finance and romance numbers both between 0.0 and 1.0 and then the greater the difference between these averaged numbers the lower the overall score. This program is giving me weird results, and its frying my brain to figure out why, if anyone can help Id appreciate it.


public class Foothill { public static void main(String[] args) { DataProfile applicant1 = new DataProfile(); DataProfile applicant2 = new DataProfile(); DataProfile applicant3 = new DataProfile(); DataProfile applicant4 = new DataProfile(); applicant1.SetName("John"); applicant1.SetGender('M'); applicant1.SetSearchGender('f'); applicant1.SetRomance(0.3); applicant1.SetFinance(0.5); applicant2.SetName("Mary"); applicant2.SetGender('F'); applicant2.SetSearchGender('m'); applicant2.SetRomance(0.9); applicant2.SetFinance(0.4); applicant3.SetName("George"); applicant3.SetGender('m'); applicant3.SetSearchGender('f'); applicant3.SetRomance(0.6); applicant3.SetFinance(0.2); applicant4.SetName("Ellen"); applicant4.SetGender('f'); applicant4.SetSearchGender('M'); applicant4.SetRomance(0.1); applicant4.SetFinance(0.8); System.out.println(applicant1.GetName()); System.out.print(" " + applicant1.GetName()); System.out.println(" fit: " + applicant1.FitValue(applicant1)); System.out.print(" " + applicant2.GetName()); System.out.println(" fit: " + applicant1.FitValue(applicant2)); System.out.print(" " + applicant3.GetName()); System.out.println(" fit: " + applicant1.FitValue(applicant3)); System.out.print(" " + applicant4.GetName()); System.out.println(" fit: " + applicant1.FitValue(applicant4)); System.out.println(applicant2.GetName()); System.out.print(" " + applicant1.GetName()); System.out.println(" fit: " + applicant2.FitValue(applicant1)); System.out.print(" " + applicant2.GetName()); System.out.println(" fit: " + applicant2.FitValue(applicant2)); System.out.print(" " + applicant3.GetName()); System.out.println(" fit: " + applicant2.FitValue(applicant3)); System.out.print(" " + applicant4.GetName()); System.out.println(" fit: " + applicant2.FitValue(applicant4)); System.out.println(applicant3.GetName()); System.out.print(" " + applicant1.GetName()); System.out.println(" fit: " + applicant3.FitValue(applicant1)); System.out.print(" " + applicant2.GetName()); System.out.println(" fit: " + applicant3.FitValue(applicant2)); System.out.print(" " + applicant3.GetName()); System.out.println(" fit: " + applicant3.FitValue(applicant3)); System.out.print(" " + applicant4.GetName()); System.out.println(" fit: " + applicant3.FitValue(applicant4)); System.out.println(applicant4.GetName()); System.out.print(" " + applicant1.GetName()); System.out.println(" fit: " + applicant4.FitValue(applicant1)); System.out.print(" " + applicant2.GetName()); System.out.println(" fit: " + applicant4.FitValue(applicant2)); System.out.print(" " + applicant3.GetName()); System.out.println(" fit: " + applicant4.FitValue(applicant3)); System.out.print(" " + applicant4.GetName()); System.out.println(" fit: " + applicant4.FitValue(applicant4)); } } class DataProfile { private char gender, search_gender; private double romance, finance; private String name; DataProfile() { gender = 'n'; search_gender = 'n'; romance = 25; //clearly out of bounds to cause error if not instantiated finance = 25; name = "nobody"; } public boolean SetGender(char genderInClass) { if (genderInClass == 'm' || genderInClass == 'M' || genderInClass == 'f' || genderInClass == 'F') { gender = genderInClass; return true; } else return false; } public char GetGender() { return gender; } public boolean SetSearchGender(char wantedGender) { if (wantedGender == 'm' || wantedGender == 'M' || wantedGender == 'f' || wantedGender == 'F') { search_gender = wantedGender; return true; } else return false; } public char GetSearchGender() { return search_gender; } public boolean SetRomance(double romanceInClass) { if (romanceInClass < 0.0 && romanceInClass > 1.0) return false; else { romance = romanceInClass; return true; } } public double GetRomance() { return romance; } public boolean SetFinance(double financeInClass) { if (financeInClass < 0.0 && financeInClass > 1.0) return false; else { finance = financeInClass; return true; } } public double GetFinance() { return finance; } public void SetName(String nameInClass) { name = new String(nameInClass); } public String GetName() { return name; } public double FitValue(DataProfile partner) { double genderNum, financeNum, romanceNum, total; genderNum = DetermineGenderFit(partner); financeNum = DetermineFinanceFit(partner); romanceNum = DetermineRomanceFit(partner); if (GetSearchGender() == partner.GetGender()) { total = genderNum * financeNum * romanceNum; return total; } else return 0.0; } private double DetermineGenderFit(DataProfile partner) { if (partner.GetGender() == GetSearchGender()) return 1.0; else return 0.0; } private double DetermineRomanceFit(DataProfile partner) { double result, ptnr, client; client = GetRomance(); ptnr = partner.GetRomance(); if (ptnr > client) result = ptnr - client; else result = client - ptnr; return result; } double DetermineFinanceFit(DataProfile partner) { double result, ptnr, client; ptnr = partner.GetFinance(); client = GetFinance(); if (ptnr > client) result = ptnr - client; else result = client - ptnr; return result; } }

thx

Im getting this error message
C:\Java>javac converter.java converter.java:9: 'class' or 'interface' expected private static void createAndShowGUI() {
with this code
import java.awt.*; public class converter { JPanel mainPane; } private static void createAndShowGUI() { initLookAndFeel(); //Window Theme JFrame.setDefaultLookAndFeelDecorated(false); //Window Creation JFrame frame = new JFrame("Converter"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOS E); //Window Content Converter converter = new Converter(); converter.mainPage.setOpaque(true); frame.setContentPane(converter.mainPage); //Window Display frame.pack(); frame.setVisible(true); } public static void main(String[] args) { javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); }

No its not precompiled, it is compiled during runtime by the virtual machine.

Which brings up a question of my own: I heard that Sun was working on this "just in time" thing where the VM would compile the entire code at once so it would run faster. Has anything been done with that?

Youre right, thanks Marc.

Wow, thats weird, because I put your code into the DancingRect class and I still get 2 errors:

Thanks Marc, but Im having the same problem with a simpler program out of the same book, and it has the import java.awt.*; I'll post the code for that as its only one file and the error message I get with it.

import java.applet.*;
import java.awt.*;

public class Mondrian2 extends Applet {
static final int NUM_RECTS = 9;

DancingRect r[];

public void init() {
System.out.println(">> init <<");
setBackground(Color.black);
initRectangles();
}
public void initRectangles() {
//allocate dancing rectangles
//now the data is encapsulated by the objects!
r = new DancingRect[NUM_RECTS];
r[0] = new DancingRect(0,0,90,90,Color.yellow);
r[1] = new DancingRect(250,0,40,190,Color.yellow);
r[2] = new DancingRect(200,55,60,135,Color.yellow);
r[3] = new DancingRect(80,200,220,90,Color.blue);
r[4] = new DancingRect(100,10,90,80,Color.blue);
r[5] = new DancingRect(80,100,110,90,Color.lightGray);
r[6] = new DancingRect(200,0,45,45,Color.red);
r[7] = new DancingRect(0,100,70,200,Color.red);
r[8] = new DancingRect(200,55,60,135,Color.magenta);

}
public void start() {
System.out.println(">> start <<");
}
public void paint(Graphics g) {
for (int i=0; i<NUM_RECTS; i++) {
r[i].paint(g);
}
}
public void stop() {
System.out.println(">> stop <<");
}

} [/CODE]
[ September 26, 2005: Message edited by: Brad Cantrell ]

Im getting mostly graphic errors for a animation applet in the book "The Black Art of Java Game Programming". Im wondering if anyone can see what might be causing it, I dont think its syntax. I'll post the code if need be.


[ September 26, 2005: Message edited by: Brad Cantrell ]
[ September 26, 2005: Message edited by: Brad Cantrell ]

Thanks much Ernest

Im currently reading "The Black Art of Java Game Programming" which was published in late 96. Besides the 4 errors which Im sure is due to some missing bracket, I get a note on the bottom that this program is using a deprecated API. Im wondering what the proper import heading should be. Does java.swing take the place of java.applet?
Heres my error code"

And the program code:
import java.applet.*; import java.awt.*; public class Broadway extends Applet implements Runnable { Thread animation; int locx,locy; int width, height; static final byte UP = 0; static final byte Down = 1; static final byte LEFT = 2; static final byte RIGHT = 3; byte state; static final int REFRESH_RATE = 100; // applet methods public void init() { System.out.println(">> init <<"); setBackground(Color.black); locx = 80; locy = 100; width = 110; height = 90; state = UP; } public void start() { System.out.println(">> start <<"); animation = new Thread(this); if (animation != null) { animation.start(); } } public void paint(Graphics g) { System.out.println(">> paint <<"); g.setColor(Color.yellow); g.fillRect(0,0,90,90); g.fillRect(250,0,40,190); g.fillRect(80,110,100,20); //hidden rectangle g.setColor(Color.blue); g.fillRect(80,200,220,90); g.fillRect(100,10,90,80); g.setColor(Color.lightGray); g.fillRect(locx,loxy,width,height); g.setColor(Color.red); g.fillRect(200,0,45,45); g.fillRect(0,100,70,200); g.setColor(Color.magenta); g.fillRect(200,55,60,135); } // update the center rectangle void updateRectangle() { switch (state) { case DOWN: locy += 2; if (locy >= 110) { state = UP; } break; case UP: locy -= 2; if (locy <= 90) { state = RIGHT; } break; case RIGHT: locx += 2; if (locx >= 90) { state = LEFT; } break; case LEFT: locx -= 2; if (locx <= 70) { state = DOWN; } break; } } public void run() { while (true) { repaint(); updateRectangle(); try { Thead.sleep (REFRESH_RATE); } catch (Exception exc) {}; } } public void stop() { System.out.println(">> stop <<"); if (animation != null) { animation.stop(); animation = null; } } }

Thanks Ernest

This code brings up "cant find symbol" errors for lines 5, 12, 13 and 18 for classes JFrame and JButton. I just cant find whats wrong.
import java.swing.*; import java.awt.event.*; public class SimpleGui1B implements ActionListener { JButton button; public static void main (String[] args) { SimpleGui1B gui = new SimpleGui1B(); gui.go(); } public void go() { JFrame frame = new JFrame(); button = new JButton("click me"); button.addActionListener(this); frame.getContentPane().add(button); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setSize(300,300); frame.setVisible(true); } public void actionPerformed(ActionEvent event) { button.setText("I've been clicked!"); } }

Thanks for that comment Layne. Some people on this forum seem to have some kind of Jedi power for spotting bad code. With me not even being able to copy code out of a book I was starting to get discouraged as to my having ability to program.