Solved

Applet help - please...

Posted on 1998-07-20
13
165 Views
Last Modified: 2013-11-23
I am trying to develop a simple applet - that when the applet starts generates three random numbers between -10 and +10.  The basics of the applet are that two of the numbers (Num1 and Num2) are summed and then the third number is the answer.  The user enters either (<, = or >) to make the statement true.  I can get the random numbers splatted to the applet, but I can not figure out how  to compare the value entered against the mathmatical expression (Num1 +  Num2 (<, =, >) Num3) - if the proper symbol is selected and the statement evaluates to true "Correct!" is displayed on the applet - or "Incorrect!' is displayed...

Also, there is a button on the applet that clears the values and generates three new random numbers and will do so until the user exits the applet...

Here is the code that I have can anyone help me??

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;

public class Game extends Applet implements ActionListener {

      TextField numOne;
      TextField numTwo;
      TextField compare;
      Label plusLabel;
      TextField answer;
      Button NextProblem;
      int value;
      int value1;
      int value2;
      int One;
      int Two;
      int Three;
      int sum;
      int result;
      String sign;
      TextField  correct;

      public void init()
   {

       // sets color and fonts sets up Applet display/look
    setBackground(Color.lightGray);
    setFont(new Font("SansSerif", Font.BOLD, 12));

      // TextFields - Label and Button for UI
    numOne = new TextField();
      numOne.setBounds( 5, 5, 10, 12);
    add( numOne );
      numOne.setEditable( false);

    plusLabel = new Label("+");
      plusLabel.setBounds( 15, 5, 5, 18 );
    plusLabel.setFont(new Font( "SansSerif", Font.BOLD, 18 ) );
    add( plusLabel );

    numTwo = new TextField();
      numTwo.setBounds( 20, 5, 10, 12 );
    add( numTwo );
      numTwo.setEditable( false );

    compare = new TextField();
      compare.setBounds( 30, 5, 10, 12 );
    add( compare );

    answer = new TextField();
      answer.setBounds( 40, 35, 10, 12 );
      add( answer );
      answer.setEditable( false );

       // Button to trigger new random number(s) generation and start game again
    NextProblem = new Button("Next Problem");
      NextProblem.setBounds( 5, 60, 40, 12 );
    add( NextProblem );

    correct = new TextField();
      correct.setBounds( 5, 80, 80, 20 );
      add( correct );


            value = 1 + (int)  (( Math.random() * 20 ) - 10);
            value1 = 1 + (int) (( Math.random() * 20 ) - 10);
            value2 = 1 + (int) (( Math.random() * 20 ) - 10);

            numOne.setText( Integer.toString( value ) );
            numTwo.setText( Integer.toString( value1 ) );
            answer.setText( Integer.toString( value2 ) );

      //compare.addActionListener(this);

    NextProblem.addActionListener(this);

    }


       // ActionEvent performed
    public void actionPerformed(ActionEvent e)
    {

            numOne.setText( "" );
            numTwo.setText( "" );
            answer.setText( "" );

            value = 1 + (int)  (( Math.random() * 20 ) - 10);
            value1 = 1 + (int) (( Math.random() * 20 ) - 10);
            value2 = 1 + (int) (( Math.random() * 20 ) - 10);

            numOne.setText( Integer.toString( value ) );
            numTwo.setText( Integer.toString( value1 ) );
            answer.setText( Integer.toString( value2 ) );

            correct.setText( "" );

    One = Integer.valueOf(numOne.getText()).intValue();
    Two = Integer.valueOf(numTwo.getText()).intValue();
    Three = Integer.valueOf(answer.getText()).intValue();

      sign = answer.getText();
      sum = One + Two;
      result = Three;

if (sum > result)
        {
                if (sign == ">")
                        correct.setText("Correct!");
                else
        if (sum < result)
                if (sign == "<")
                        correct.setText("Correct!");
                else
        if (sum == result)
                if (sign == "=")
                        correct.setText("Correct!");
                else
                        correct.setText("Incorrect!");
       

             }
      }
}

0
Comment
Question by:n2chiles
  • 8
  • 5
13 Comments
 

Author Comment

by:n2chiles
ID: 1227146
Edited text of question
0
 

Author Comment

by:n2chiles
ID: 1227147
Edited text of question
0
 
LVL 6

Accepted Solution

by:
gadio earned 100 total points
ID: 1227148
Here is a fix for your prog. If you have Qs, feel free to ask.

import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;

public class small_game extends Applet implements ActionListener, TextListener {

    TextField numOne;
    TextField numTwo;
    TextField compare;
    Label plusLabel;
    TextField answer;
    Button NextProblem;
    int value;
    int value1;
    int value2;
    int One;
    int Two;
    int Three;
    int sum;
    int result;
    String sign;
    TextField  correct;

    public void init()
       {

    // sets color and fonts sets up Applet display/look
        setBackground(Color.lightGray);
        setFont(new Font("SansSerif", Font.BOLD, 12));

    // TextFields - Label and Button for UI
        numOne = new TextField();
    numOne.setBounds( 5, 5, 10, 12);
        add( numOne );
    numOne.setEditable( false);

        plusLabel = new Label("+");
    plusLabel.setBounds( 15, 5, 5, 18 );
        plusLabel.setFont(new Font( "SansSerif", Font.BOLD, 18 ) );
        add( plusLabel );

        numTwo = new TextField();
    numTwo.setBounds( 20, 5, 10, 12 );
        add( numTwo );
    numTwo.setEditable( false );

        compare = new TextField();
    compare.setBounds( 30, 5, 10, 12 );
    compare.addTextListener(this);
        add( compare );

        answer = new TextField();
    answer.setBounds( 40, 35, 10, 12 );
    add( answer );
    answer.setEditable( false );

    // Button to trigger new random number(s) generation and start game again
        NextProblem = new Button("Next Problem");
    NextProblem.setBounds( 5, 60, 40, 12 );
        add( NextProblem );

        correct = new TextField(10);
    //correct.setBounds( 5, 80, 80, 20 );
    add( correct );


    value = 1 + (int)  (( Math.random() * 20 ) - 10);
    value1 = 1 + (int) (( Math.random() * 20 ) - 10);
    value2 = 1 + (int) (( Math.random() * 20 ) - 10);

    numOne.setText( Integer.toString( value ) );
    numTwo.setText( Integer.toString( value1 ) );
    answer.setText( Integer.toString( value2 ) );

    //compare.addActionListener(this);

        NextProblem.addActionListener(this);

        }


    public void textValueChanged( TextEvent te ) {

    if( correct == null ) return;

        One = Integer.valueOf(numOne.getText()).intValue();
        Two = Integer.valueOf(numTwo.getText()).intValue();
        Three = Integer.valueOf(answer.getText()).intValue();

    sign = compare.getText();

    sum = One + Two;
    result = Three;

    if (sum > result)
            {
                    if (sign.equals( ">" )) {
                            correct.setText("Correct!");
                            compare.setEditable(false);
                    }
                    else
            if (sum < result)
                    if (sign.equals("<")) {
                            correct.setText("Correct!");
                            compare.setEditable(false);
                    }
                    else
            if (sum == result)
                    if (sign.equals("=") ) {
                            correct.setText("Correct!");
                            compare.setEditable(false);
                    }
                    else {
                            correct.setText("Incorrect!");
                            compare.setEditable(false);
                    }


      }
    }

    // ActionEvent performed
        public void actionPerformed(ActionEvent e)
        {
    correct.setText( "" );

    numOne.setText( "" );
    numTwo.setText( "" );
    answer.setText( "" );

    value = 1 + (int)  (( Math.random() * 20 ) - 10);
    value1 = 1 + (int) (( Math.random() * 20 ) - 10);
    value2 = 1 + (int) (( Math.random() * 20 ) - 10);

    numOne.setText( Integer.toString( value ) );
    numTwo.setText( Integer.toString( value1 ) );
    answer.setText( Integer.toString( value2 ) );
    compare.setEditable(true);

    }
}


0
 
LVL 6

Expert Comment

by:gadio
ID: 1227149
The finding and checking of the sign works, but you still have some logical bugs there.  :-)  Thats for you to fix...
0
 

Author Comment

by:n2chiles
ID: 1227150
Gadio,

Thanks,  I appreciate the pointers and your assistance.

Have a good one...

map
0
 

Author Comment

by:n2chiles
ID: 1227151
Gadio,

I have had time to evaluate and the Nested IF statement only evaluates the first of the three signs in the body of the if statement...

any ideas...


0
Why You Should Analyze Threat Actor TTPs

After years of analyzing threat actor behavior, it’s become clear that at any given time there are specific tactics, techniques, and procedures (TTPs) that are particularly prevalent. By analyzing and understanding these TTPs, you can dramatically enhance your security program.

 
LVL 6

Expert Comment

by:gadio
ID: 1227152
Yes. Looking at it again, youl see that all the evaluation section is in this condition:

 if (sum > result)

So, only in that condition ANY other condition is evaluated...
0
 

Author Comment

by:n2chiles
ID: 1227153
Gadio,

I tried playing with the nested IF statements and got nowhere with it...

I have been tinkering with the Switch statement but can't get it through the compiler...

I am taking a closer look at the way the ActionListener works and why I can't use the Switch in TextListener - I am starting to get frustrated because being new at Java I am not too experienced with the syntax and that is what seems to be tripping me up...

You know how to use it and when to use it...

map
0
 

Author Comment

by:n2chiles
ID: 1227154
Gadio,

I tried playing with the nested IF statements and got nowhere with it...

I have been tinkering with the Switch statement but can't get it through the compiler...

I am taking a closer look at the way the ActionListener works and why I can't use the Switch in TextListener - I am starting to get frustrated because being new at Java I am not too experienced with the syntax and that is what seems to be tripping me up...

You know how to use it and when to use it...

map
0
 
LVL 6

Expert Comment

by:gadio
ID: 1227155
import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;

public class small_game extends Applet implements ActionListener, TextListener {

  TextField numOne;
  TextField numTwo;
  TextField compare;
  Label plusLabel;
  TextField answer;
  Button NextProblem;
  int value;
  int value1;
  int value2;
  int One;
  int Two;
  int Three;
  int sum;
  int result;
  String sign;
  TextField  correct;

  public void init()
  {

    // sets color and fonts sets up Applet display/look
        setBackground(Color.lightGray);
        setFont(new Font("SansSerif", Font.BOLD, 12));

    // TextFields - Label and Button for UI
        numOne = new TextField();
    numOne.setBounds( 5, 5, 10, 12);
        add( numOne );
    numOne.setEditable( false);

        plusLabel = new Label("+");
    plusLabel.setBounds( 15, 5, 5, 18 );
        plusLabel.setFont(new Font( "SansSerif", Font.BOLD, 18 ) );
        add( plusLabel );

        numTwo = new TextField();
    numTwo.setBounds( 20, 5, 10, 12 );
        add( numTwo );
    numTwo.setEditable( false );

        compare = new TextField();
    compare.setBounds( 30, 5, 10, 12 );
    compare.addTextListener(this);
        add( compare );

        answer = new TextField();
    answer.setBounds( 40, 35, 10, 12 );
    add( answer );
    answer.setEditable( false );

    // Button to trigger new random number(s) generation and start game again
        NextProblem = new Button("Next Problem");
    NextProblem.setBounds( 5, 60, 40, 12 );
        add( NextProblem );

        correct = new TextField(10);
    //correct.setBounds( 5, 80, 80, 20 );
    add( correct );


    value = 1 + (int)  (( Math.random() * 20 ) - 10);
    value1 = 1 + (int) (( Math.random() * 20 ) - 10);
    value2 = 1 + (int) (( Math.random() * 20 ) - 10);

    numOne.setText( Integer.toString( value ) );
    numTwo.setText( Integer.toString( value1 ) );
    answer.setText( Integer.toString( value2 ) );

    //compare.addActionListener(this);

        NextProblem.addActionListener(this);

  }


  public void textValueChanged( TextEvent te ) {

    if( correct == null ) return;

        One = Integer.valueOf(numOne.getText()).intValue();
        Two = Integer.valueOf(numTwo.getText()).intValue();
        Three = Integer.valueOf(answer.getText()).intValue();

    sign = compare.getText();

    sum = One + Two;
    result = Three;

    if ( sign.equals( ">" ) || sign.equals("<") || sign.equals("=") ) {
          if ( (sum > result && sign.equals( ">" )) ||
                   (sum < result && sign.equals("<")) ||
                   (sum == result && (sign.equals("=") )) ) {
                correct.setText("Correct!");
                compare.setEditable(false);
          }
          else {
                correct.setText("Incorrect!");
                compare.setEditable(false);
          }
        }
        else if( ! sign.equals("") ) compare.setText("");
  }

  // ActionEvent performed
  public void actionPerformed(ActionEvent e)
  {
    correct.setText( "" );
    compare.setText( "" );

    numOne.setText( "" );
    numTwo.setText( "" );
    answer.setText( "" );

    value = 1 + (int)  (( Math.random() * 20 ) - 10);
    value1 = 1 + (int) (( Math.random() * 20 ) - 10);
    value2 = 1 + (int) (( Math.random() * 20 ) - 10);

    numOne.setText( Integer.toString( value ) );
    numTwo.setText( Integer.toString( value1 ) );
    answer.setText( Integer.toString( value2 ) );
    compare.setEditable(true);

  }
}

Enjoy.
G.
0
 

Author Comment

by:n2chiles
ID: 1227156
G.

Thanks,

The only other problem is that I can not figure out how to ge the LayoutManager to let me null it out so I can use the setBounds() to position the labels and TextField on the applet.

I believe it is the FlowLayout that is the default LayoutManger for applet - but how in the H - E - double hockey sticks do you null it out??

Thanks again...

map
0
 

Author Comment

by:n2chiles
ID: 1227157
G.

I figured it out...

setLayout( null );

that worked great!!

Thanks for a prod - poke and the swift kick in the behind...

It has helped me learn a great deal and reduced the stress levels too!!

Thanks again,

map
0
 
LVL 6

Expert Comment

by:gadio
ID: 1227158
Happy to be of help.
0

Featured Post

How your wiki can always stay up-to-date

Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
- Increase transparency
- Onboard new hires faster
- Access from mobile/offline

Join & Write a Comment

Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
Introduction This article is the second of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers the basic installation and configuration of the test automation tools used by…
Viewers will learn about arithmetic and Boolean expressions in Java and the logical operators used to create Boolean expressions. We will cover the symbols used for arithmetic expressions and define each logical operator and how to use them in Boole…
Viewers will learn about the regular for loop in Java and how to use it. Definition: Break the for loop down into 3 parts: Syntax when using for loops: Example using a for loop:

757 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now