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Thread: Another applet to program problem....

  1. #1
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    Default Another applet to program problem....

    I do not know why my teacher decided she wanted all our handed in work to be like this. So far I complete almost all my assignments to be like this but this one. This is just a small quiz in a Jframe.

    This is my file to run it as an application:
    import java.awt.*;
    public class go {
      public static void main(String[] args) {
            Quiz test = new Quiz();
    		  TheApplet myApplet = new TheApplet(); 
    	     Frame myFrame = new Frame("Applet Holder"); 
     
        myApplet.init();	
     
        myFrame.add(myApplet, BorderLayout.CENTER);
        myFrame.pack(); 
        myFrame.setVisible(true);
      } 
    }

    This is my Jframe:

    import java.io.*;
    import java.awt.*;
    import java.util.*;
    import java.applet.*;
    import javax.swing.*;
    import java.awt.event.*; 
    import javax.swing.event.*;
    import java.util.Random;
     
     
     
    public class Quiz extends JFrame implements ActionListener
    {
      public Font titleFont;
      public Font buttonFont;
      public Font normalFont;
      public Image head;
      public Button BA, BB,BC, BD, BNQ;
      public int score = 0, questionsAsked = 0;
      public Label scoreLabel;
      public Label statusLabel;
      public String scoreString;
      public final int NUMQUESTIONS = 5;       //this is a constant
      public final int NUMLINES = 4;           //also a constant
      public String messageString[][];         //will be 6 msgs by 4 lines
      public int currentQuestion = 0;
      public int count = 0;
      public char answer[];
      public RandInt randNumGen;               //random num generator
     
     
      public void init()
      {
         setLayout(null);
         setSize(640,550);                      //Size of screen
         setBackground (Color.cyan);
         titleFont = new Font ("SansSerif", Font.BOLD, 28);
         buttonFont = new Font ("Dialog", Font.BOLD, 16);
         normalFont = new Font ("SansSerif", Font.PLAIN, 16);
         head = getImage(getCodeBase(), "head.gif");
     
     
         BA = new Button("A");                    //Button A
         BA.setBounds(485,120,60,36);
         BA.setFont(buttonFont);
         BA.setBackground(Color.lightGray);
         BA.addActionListener(this);
         add(BA);
         BB = new Button("B");                    //Button B
         BB.setBounds(485,180,60,36);
         BB.setFont(buttonFont);
         BB.setBackground(Color.lightGray);
         BB.addActionListener(this);
         add(BB);
         BC = new Button("C");                    //Button C
         BC.setBounds(485,240,60,36);
         BC.setFont(buttonFont);
         BC.setBackground(Color.lightGray);
         BC.addActionListener(this);
         add(BC);
         BD = new Button("D");                    //Button D
         BD.setBounds(485,300,60,36);
         BD.setFont(buttonFont);
         BD.setBackground(Color.lightGray);
         BD.addActionListener(this);
         add(BD);
     
     
         BNQ = new Button("New Quiz");            //Button New Quiz
         BNQ.setBounds(445,360,140,36);
         BNQ.setFont(buttonFont);
         BNQ.setBackground(Color.lightGray);
         BNQ.addActionListener(this);
         add(BNQ);
     
         //initialise score and add to layout
         scoreString = "Score: " + score + " / " + questionsAsked;
         scoreLabel = new Label(scoreString);
         scoreLabel.setBounds(20,240,240,28);
         scoreLabel.setFont(normalFont);
         add(scoreLabel);
     
    	 statusLabel = new Label("");
    	 statusLabel.setBounds(20,300,440,28);
    	 statusLabel.setFont(normalFont);
    	 add(statusLabel);
     
         //initialise messages and answers
         messageString = new String[NUMQUESTIONS+1][NUMLINES];
         answer = new char[NUMQUESTIONS+1];
         messageString[0][0] = "End of quiz";
         messageString[0][1] = "Please click on the New";
         messageString[0][2] = "Quiz button to restart";
         messageString[0][3] = "";
         answer[0] = 'Z';
         messageString[1][0] = "Is a wombat (A) a quadruped Australian Mammal";
         messageString[1][1] = "(B)a kind of flying mammal ";
         messageString[1][2] = "(C)alien  or (D)human";
         messageString[1][3] = "";
         answer[1] = 'A';
         messageString[2][0] = "What is the cube root of 64?";
         messageString[2][1] = "(A)8  (B)4";
         messageString[2][2] = "(C)7  (D)12";
         messageString[2][3] = "";
         answer[2] = 'B';
         messageString[3][0] = "Who made it to the South Pole First";
         messageString[3][1] = "(A) Amundsen or (B) Scott?";
         messageString[3][2] = "(C) Nelson or (D) Jonathan?";
         messageString[3][3] = "";
         answer[3] = 'A';
         messageString[4][0] = "When did the first men walk on the moon?";
         messageString[4][1] = "(A)1970 or (B)1969";
         messageString[4][2] = "(C) 1965, or (D) 1980?";
         messageString[4][3] = "";
         answer[4] = 'B';
         messageString[5][0] = "How many teeth does a human have?";
         messageString[5][1] = "(A)42, or  (B)50 ";
         messageString[5][2] = "(C)100,or  (D)45";
         messageString[5][3] = "";
         answer[5] = 'A';
     
         //create random integer generator with numbers 1 - NUMQUESTIONS
         randNumGen = new RandInt(NUMQUESTIONS);
     
         //choose first question
         currentQuestion = randNumGen.nextVal();
     
      }
     
      public void paint(Graphics g)
      {
        // display title
        g.setColor(Color.red);
        g.setFont(titleFont);
        g.drawString("Quiz Applet", 20, 40);
        g.drawImage(head, 280, 10, this);
     
        //display the current question
        g.setColor(Color.black);
        g.setFont(normalFont);
        for (int n = 0; n < NUMLINES; n++)
        {
          g.drawString(messageString[currentQuestion][n], 20, 120+n*26);
        }
      }
     
      public void actionPerformed(ActionEvent event)
      {
        String command = event.getActionCommand();
        if (command.equals("New Quiz"))
        {
          score = questionsAsked = 0;
          randNumGen.reSort();
          currentQuestion = randNumGen.nextVal();
          scoreString = "Score: " + score + " / " + questionsAsked;
          scoreLabel.setText(scoreString);
          repaint();
          return;
        }
     
    	else if (command.equals(Character.toString(answer[currentQuestion]))) {
    		score++;
    		questionsAsked++;
    		scoreString = "Score: " + score + " / " + questionsAsked;
    		scoreLabel.setText(scoreString);
    		statusLabel.setText(""); // or do statusLabel.setText("Correct!");
    		count = 0;
     
    	}
     
    	else {
    		count++;
    		if (count == 1) {
    			scoreString = "Score: " + score + " / " + questionsAsked;
    			scoreLabel.setText(scoreString);
    			statusLabel.setText("Wrong, try again.");
    			return;
    		}
    		else {
    			count = 0;
    			questionsAsked++;
    			scoreString = "Score: " + score + " / " + questionsAsked;
    			scoreLabel.setText(scoreString);
    			statusLabel.setText("Wrong again, correct answer to previous question is " + answer[currentQuestion]);
    		}
    	}
     
    	if (questionsAsked >= NUMQUESTIONS)
    		currentQuestion = 0;
    	else
    		currentQuestion = randNumGen.nextVal();
    	repaint();
      }
    }

    When I run compiler after these changes, now my program is broken. This is the compiler message I am receiving.

    Quiz.java:29: cannot find symbol
    symbol  : class RandInt
    location: class Quiz
      public RandInt randNumGen;               //random num generator
             ^
    go.java:5: cannot find symbol
    symbol  : class TheApplet
    location: class go
    		  TheApplet myApplet = new TheApplet(); 
    		  ^
    go.java:5: cannot find symbol
    symbol  : class TheApplet
    location: class go
    		  TheApplet myApplet = new TheApplet(); 
    		                           ^
    Quiz.java:40: cannot find symbol
    symbol  : method getCodeBase()
    location: class Quiz
         head = getImage(getCodeBase(), "head.gif");
                         ^
    Quiz.java:123: cannot find symbol
    symbol  : class RandInt
    location: class Quiz
         randNumGen = new RandInt(NUMQUESTIONS);
                          ^
    5 errors

    Pretty sure I imported the correct group.


  2. #2
    Member
    Join Date
    Apr 2012
    Posts
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    Default Re: Another applet to program problem....

    I assume the class RandInt is some class you have inside your package? If it's outside your package you will have to add an import for it.

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