JAVA help

[Munchkin]

Hello,

I have to do this problem and I can't get it to work correctly. There is
something wrong with the display.
I have to have it display on the applet string "this number is greater" or
"numbers are equal" Here is the
source code.
If anyone can help, I would be extremely appreciative. I have been working
on this for almost a week and
I am ready to pull out my hair.

import java.awt.Graphics; //import class Graphics
import javax.swing.*; //import package javax.swing

public class FloatingApplet extends JApplet {

double sum;
public void init ()
{
String firstNumber, //first string number
secondNumber, //second string number
result; //result string number

double number1, //first number to double
number2; //second number to double

//read in first number from user
firstNumber =
JOptionPane.showInputDialog (
"Enter first floating-point value");

secondNumber =
JOptionPane.showInputDialog (
"Enter second floating-point value");

//convert numbers from type string to type double
number1 = Double.parseDouble (firstNumber);
number2 = Double.parseDouble (secondNumber);

//initialize result to empty string
result = "";

if ( number1 > number2 )
result = result + number1 + ">" + number2 ;

if (number1 < number2)
result = result + number1 + "<" + number2 ;

if (number1 == number2)
result = result + number1 + " == " + number2
;


}
public void paint ( Graphics g)
//draw the results with g.drawstring
{
g.drawRect (15, 10, 270, 20);
g.drawString ( "" , 25,25 );

}
}

[John jmaclatchie]

Suggest you replace:

//convert numbers from type string to type double
number1 = Double.parseDouble (firstNumber);
number2 = Double.parseDouble (secondNumber);

with this:

//convert numbers from type string to type double
Double one = new Double(firstNumber);
Double two = new Double(secondNumber);
number1 = one.doubleValue();
number2 = two.doubleValue();

and try it.
...John

"Munchkin" <tjhubal@iex.net> wrote:
>
>Hello,
>
>I have to do this problem and I can't get it to work correctly. There is
>something wrong with the display.
>I have to have it display on the applet string "this number is greater"
or
>"numbers are equal" Here is the
>source code.
>If anyone can help, I would be extremely appreciative. I have been working
>on this for almost a week and
>I am ready to pull out my hair.
>
>import java.awt.Graphics; //import class Graphics
>import javax.swing.*; //import package javax.swing
>
>public class FloatingApplet extends JApplet {
>
> double sum;
> public void init ()
> {
> String firstNumber, //first string number
> secondNumber, //second string number
> result; //result string number
>
> double number1, //first number to double
> number2; //second number to double
>
> //read in first number from user
> firstNumber =
> JOptionPane.showInputDialog (
> "Enter first floating-point value");
>
> secondNumber =
> JOptionPane.showInputDialog (
> "Enter second floating-point value");
>
> //convert numbers from type string to type double
> number1 = Double.parseDouble (firstNumber);
> number2 = Double.parseDouble (secondNumber);
>
> //initialize result to empty string
> result = "";
>
> if ( number1 > number2 )
> result = result + number1 + ">" + number2 ;
>
> if (number1 < number2)
> result = result + number1 + "<" + number2 ;
>
> if (number1 == number2)
> result = result + number1 + " == " + number2
>;
>
>
> }
> public void paint ( Graphics g)
> //draw the results with g.drawstring
> {
> g.drawRect (15, 10, 270, 20);
> g.drawString ( "" , 25,25 );
>
> }
>}
>
>

[aniljoo]

"Munchkin" <tjhubal@iex.net> wrote:
>
>Hello,
>
>I have to do this problem and I can't get it to work correctly. There is
>something wrong with the display.
>I have to have it display on the applet string "this number is greater"
or
>"numbers are equal" Here is the
>source code.
>If anyone can help, I would be extremely appreciative. I have been working
>on this for almost a week and
>I am ready to pull out my hair.
>
>import java.awt.Graphics; //import class Graphics
>import javax.swing.*; //import package javax.swing
>
>public class FloatingApplet extends JApplet {
>
> double sum;
> public void init ()
> {
> String firstNumber, //first string number
> secondNumber, //second string number
> result; //result string number
>
> double number1, //first number to double
> number2; //second number to double
>
> //read in first number from user
> firstNumber =
> JOptionPane.showInputDialog (
> "Enter first floating-point value");
>
> secondNumber =
> JOptionPane.showInputDialog (
> "Enter second floating-point value");
>
> //convert numbers from type string to type double
> number1 = Double.parseDouble (firstNumber);
> number2 = Double.parseDouble (secondNumber);
>
> //initialize result to empty string
> result = "";
>
> if ( number1 > number2 )
> result = result + number1 + ">" + number2 ;
>
> if (number1 < number2)
> result = result + number1 + "<" + number2 ;
>
> if (number1 == number2)
> result = result + number1 + " == " + number2
>;
>
>
> }
> public void paint ( Graphics g)
> //draw the results with g.drawstring
> {
> g.drawRect (15, 10, 270, 20);
> g.drawString ( "" , 25,25 );
>
> }
>}
>
>

hai

from what i understand from the above is that you

want to print a string "greater or equalto.. in JApplet

use g.drawString(stringname,x,y);
hope this will help

[shawn]

I like to put in a "single student average" and a "remove student" and
"three courses for each student" into my program, I have 96% done, been
screwing up my program trying all these times.

Need help please.

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

public class StudentGrades extends JFrame {

private JLabel name, id, grade, classAverage, highScore, scoreId,
score, bs, studentList, sorted, explain, removelist;
private JTextField nameText, idText, gradeText, highScoreText,
removeText, classAveText, idScoreText, scoreText, bsText;
private JTextArea listText, sortText;
private JButton enterButton, averageButton, highScoreButton,
removeButton, bsButton, sortButton ;

/**used to keep track of the current number of students added
*/

private int scount=0;

/**Creates an array of Students (0 through 16).
*/

private Student[] Students = new Student[16];
class Student {
private String name;
private int id;
private double grade;

/** Gives assignments for array variables of class Student
*/
public Student( String n, int d, double g )
{
name = n;
id = d;
grade = g;
}
/** getName method returns the 'name' in the Student array.
*/
public String getName() { return name; }

/** getId method returns the 'id' in the Student array.
*/

public int getId() { return id; }

/** getGrade method returns the 'grade' in the Student array.
*/

public double getGrade() { return grade;}
}

/**Method for developing the GUI outline.
*/

public StudentGrades()
{
super( "Student Grades - By: Shawn McNaughton" );//Display title
of program in title bar.

/**Bring in the container
*/

Container c = getContentPane();

/**Define a new JPanel for Name label and text field.
*/

JPanel namePanel = new JPanel();
namePanel.setLayout(new FlowLayout(FlowLayout.RIGHT, 5, 5));
name = new JLabel("Name");
name.setFont(new Font("Sans Serif", Font.BOLD, 13));
namePanel.add(name);
nameText = new JTextField(10);
namePanel.add(nameText);

/**Define a new JPanel for Id label and text field.
*/

JPanel idPanel = new JPanel();
idPanel.setLayout(new FlowLayout(FlowLayout.RIGHT, 5, 5));
id = new JLabel("ID");
id.setFont(new Font("Sans Serif", Font.BOLD, 13));
idPanel.add(id);
idText = new JTextField(10);
idPanel.add(idText);

/**Define a new JPanel for Grade label and text field.
*/

JPanel gradePanel = new JPanel();
gradePanel.setLayout(new FlowLayout(FlowLayout.RIGHT, 5, 5));
grade = new JLabel("Grade");
grade.setFont(new Font("Sans Serif", Font.BOLD, 13));
gradePanel.add(grade);
gradeText = new JTextField(10);
gradePanel.add(gradeText);

/**Define a new JPanel for class Average label and text field.
*/

JPanel classAveragePanel = new JPanel();
classAveragePanel.setLayout(new FlowLayout(FlowLayout.RIGHT, 5, 5));
classAverage = new JLabel("Class Average");
classAverage.setFont(new Font("Sans Serif", Font.BOLD, 13));
classAveragePanel.add(classAverage);
classAveText = new JTextField(10);
classAveragePanel.add(classAveText);

/**Define a new JPanel for High Score label.
*/

JPanel highScorePanel = new JPanel();
highScorePanel.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 5));
highScore = new JLabel("High Score");
highScore.setFont(new Font("Sans Serif", Font.BOLD, 13));
highScorePanel.add(highScore);

/**Define a new JPanel for ID label and text field.
*/

JPanel scoreIdPanel = new JPanel();
scoreIdPanel.setLayout(new FlowLayout(FlowLayout.RIGHT, 5, 5));
scoreId = new JLabel("ID");
scoreId.setFont(new Font("Sans Serif", Font.BOLD, 13));
scoreIdPanel.add(scoreId);
idScoreText = new JTextField(10);
scoreIdPanel.add(idScoreText);

/**Define a new JPanel for Score label and text field.
*/

JPanel scorePanel = new JPanel();
scorePanel.setLayout(new FlowLayout(FlowLayout.RIGHT, 5, 5));
score = new JLabel("Score");
score.setFont(new Font("Sans Serif", Font.BOLD, 13));
scorePanel.add(score);
scoreText = new JTextField(10);
scorePanel.add(scoreText);


/**Define a new JPanel for B's label and text field.
*/

JPanel bsPanel = new JPanel();
bsPanel.setLayout(new FlowLayout(FlowLayout.RIGHT, 5, 5));
bs = new JLabel("B's");
bs.setFont(new Font("Sans Serif", Font.BOLD, 13));
bsText = new JTextField(10);
bsPanel.add(bs);
bsPanel.add(bsText);

/**Define a new JPanel for Student ID List and ID's Sorted labels.
*/

JPanel listTitlePanel = new JPanel();
listTitlePanel.setLayout(new FlowLayout(FlowLayout.LEFT, 5, 5));
studentList = new JLabel("Student ID List");
studentList.setFont(new Font("Sans Serif", Font.BOLD, 13));
sorted = new JLabel(" ID's Sorted");
sorted.setFont(new Font("Sans Serif", Font.BOLD, 13));
listTitlePanel.add(studentList);
listTitlePanel.add(sorted);

/**Define a new JPanel for Student ID List and ID's Sorted text
*areas.
*/

JPanel listTextPanel = new JPanel();
listTextPanel.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 5));
listText = new JTextArea(15, 5);
listText.setFont(new Font("Sans Serif", Font.BOLD, 13));
sortText = new JTextArea(15, 5);
sortText.setFont(new Font("Sans Serif", Font.BOLD, 13));
listTextPanel.add(listText);
listTextPanel.add(sortText);

/**Define a main JPanel to hold all the other panels with the
*BoxLayout Manager
*/

JPanel mainPanel = new JPanel();
mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.Y_AXIS));

/**Add each of the above defined JPanels to the mainPanel
*/

mainPanel.add(namePanel);
mainPanel.add(idPanel);
mainPanel.add(gradePanel);
mainPanel.add(classAveragePanel);
mainPanel.add(highScorePanel);
mainPanel.add(scoreIdPanel);
mainPanel.add(scorePanel);
mainPanel.add(bsPanel);
mainPanel.add(listTitlePanel);
mainPanel.add(listTextPanel);
c.add(mainPanel, BorderLayout.WEST); //add the main panel.

/**Create a separate JPanel for the JButtons
*/

JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new FlowLayout(FlowLayout.RIGHT, 10, 10));
enterButton = new JButton ("ADD STUDENT");
removeButton = new JButton ("REMOVE STUDENT");
averageButton = new JButton ("AVERAGE");
highScoreButton = new JButton ("HIGH SCORE");
bsButton = new JButton ("DISPLAY B's");
sortButton = new JButton ("SORT ID's");
explain = new JLabel ("Press until all sorted.");
c.add(buttonPanel); //add the button panel.

/**Add the Buttons to the button panel.
*/

buttonPanel.add(removeButton);
buttonPanel.add(enterButton);
buttonPanel.add(highScoreButton);
buttonPanel.add(bsButton);
buttonPanel.add(averageButton);
buttonPanel.add(sortButton);
buttonPanel.add(explain);

/**Event Handler (ActionListener) for the Enter Button. Runs the
addstudent and
*addIdList methods.
*/

enterButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
addstudent();
addIdList();

}
}
);

/**Event Handler (ActionListener) for Average Button. Calls calc_ave
method.
*/

averageButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
calc_avg();
}
}
);

/**Event Handler (ActionListener) for High Score Button. Calls calc_hs
method.
*/

highScoreButton.addActionListener(new ActionListener()

{
public void actionPerformed(ActionEvent e)

{
calc_hs();
}
}
);

/**Event Handler (ActionListener) for B's Button. Calls calc_bs
method.
*/

bsButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
calc_bs();
}
}
);

/**Event Handler (ActionListener) for the Sort Button. Calls
sortIdArray method.
*/

sortButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
sortIdArray();
}
}
);



/**Set size of container and call show method.
*/

setSize( 400, 550 );
show();
}

/**addstudent method that adds a student to the array.
*/

private void addstudent()
{
String name,tempid,tempgrade;
int id;
double grade;
if (scount < 17)
{
//Gets the text from the text Fields
name = nameText.getText();
tempid = idText.getText();
tempgrade = gradeText.getText();
if (tempid.length() != 0 && tempgrade.length() != 0
&& name.length() != 0)
{
//makes the actual student class inside of
the array
Students[scount] = new
Student(name,Integer.parseInt(tempid),Float.parseFloat(tempgrade));

//Integer.parseInt() takes a string
value and returns an Integer.
nameText.setText(""); //resets the
text fields back to blank.
idText.setText("");
gradeText.setText("");
nameText.requestFocus();//Sets the
cursor to the name field
scount++;//adds one to the student
counter
}
}
}

/** addIdList method that adds the student ID's to the listText Text
Area
*/

private void addIdList()
{
byte i = 0;
String tempStr = new String();
for (i=0; i < scount; i++)
{
tempStr += Students[i].getId() + "\n";//gets the id via
the getId method for array and assigns to tempStr
}
listText.setText(tempStr);
}

/**Sort array of id's and print out to sortText Text Area.
*/

private void sortIdArray()
{
sortText.setText("");
byte i = 0;
String tempStr = new String();
Student tempStudent;
for (i = 0; i < scount-1; i++)
{
if (Students[i].getId() > Students[i+1].getId())
{
tempStudent = Students[i+1];
Students[i+1] = Students[i];
Students[i] = tempStudent;
}
}
for (i=0; i < scount; i++)
{
tempStr += Students[i].getId() + "\n";
}

sortText.setText(tempStr);
}

/**Calculates all the letter grade
*/

private void calc_bs()
{
int bcount=0;
int ccount=0;
int dcount=0;
int acount=0;
int fcount=0;
for(int i=0;i<scount;i++)
{ if (Students[i].getGrade() >90 && Students[i].getGrade() <=
100){acount ++;
} else if (Students[i].getGrade() <80 &&
Students[i].getGrade() >= 89.99){bcount ++;
} else if(Students[i].getGrade() <70 &&
Students[i].getGrade() >= 79.99){ccount ++;
} else if(Students[i].getGrade() <60 &&
Students[i].getGrade() >= 69.99){dcount ++;
}else {fcount ++;}

}

//makes a new Integer for a sec with the bcount value, converts it to
a string, and then sets
//the text to it

bsText.setText(new Integer(bcount).toString());
}

/**Finds the High Score
*/

private void calc_hs()
{
String stuname = "";
int stuid = 0;
double stugrade = 0, bgrade = 0;
for (int i = 0;i < scount;i++)
{
//Compares to see if the current students grade is
greater then the last best grade, if it is
//records the name, id and grade for later use.

if (bgrade < Students[i].getGrade())
{
stuname = Students[i].getName();
stuid = Students[i].getId();
stugrade = Students[i].getGrade();
bgrade = stugrade;
}
}

//Changes the text fields to the values recorded earlier
highScore.setText("High Score : " + stuname);

//Changes highscore label and appends the name of the
student with high score to label.
idScoreText.setText(new Integer(stuid).toString());
scoreText.setText(new Double(stugrade).toString());
}

/**Calculates the average
*/

private void calc_avg()
{
double totalGrades = 0,studentGrade = 0;
double averageGrades;
for (int i=0;i<scount;i++)
{
studentGrade = Students[i].getGrade();
totalGrades += studentGrade;
}
averageGrades = ((totalGrades)/scount);
classAveText.setText(new Double(averageGrades).toString());
}

/**Adds student ID's to listText Text Area
*/

private void addidlist()
{
//String stuname = "";
int stuid = 0;
for (int i = 0;i < scount;i++)
{
stuid = Students[i].getId();
}
listText.setText(new Integer(stuid).toString());
}

/**main method
*/

public static void main( String args[] )
{
StudentGrades app = new StudentGrades();
app.addWindowListener (
new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{System.exit(0);
}
});
}
}