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Identifier expected and Illegal start of Expression errors

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Join Date: Apr 2008

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christiangirl christiangirl is offline

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Identifier expected and Illegal start of Expression errors

Jan 13th, 2009

Hello,
I am getting Identifier expected and Illegal start of Expression erros in this code:

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//"Math is our Game" - A math testing program for First through Fourth grade students
 
//Import GUI packages
 
 
import javax.swing.*;
import BreezySwing.*;
import java.awt.*; 
import java.util.Random; 
//import TurtleGraphics.*;
 
public class Math extends GBFrame
{
 
//declare variables for the window objects
 
private JLabel         greetingLabel;
private JLabel         additionLabel;
private JLabel         subtractionLabel;
private JLabel         multiplicationLabel;
private JLabel         divisionLabel;
private JLabel         randomLabel;
private JLabel         grade1Label;
private JLabel         grade2Label;
private JLabel         inputLabel;
private JLabel         gradeLabel;
private JLabel         questionLabel; 
 
private JTextField     greetingField;
private JTextField     additionField;
private JTextField     subtractionField;
private JTextField     multiplicationField;
private JTextField     divisionField;
private JTextField     randomField;
private JTextField     grade1Field;
private JTextField     grade2Field;
private JTextField     inputField;
private JTextField     questionField; 
 
private JButton         greetingButton;
private JButton         additionButton;
private JButton         subtractionButton;
private JButton         multiplicationButton;
private JButton         divisionButton;
private JButton         randomButton;    
private JButton         grade1Button;
private JButton         grade2Button;
private JButton         grade3Button;
private JButton         grade4Button;
private JButton         inputButton;
private JButton         quitButton;
private JButton         questionButton; 
/*int generator1=0;
int generator2=0;
int generator3=0;
int generator4=0;*/
 
JTextArea greetingArea;
 
Random generator = new Random(5);
//constructor
public Math()
{
   setUp();
}
 
//Open greeting screen with welcome and Start button
public void setUp()
{
greetingLabel = addLabel("Greeting", 1, 1, 1, 1);//greetingLabel.setText("Greeting"); //= addLabel      ("Greeting" ,1,1,1,1);
greetingArea = addTextArea("Welcome to Math is our Game, \na math skills program by \nNine Fingers and Ten Toes Software, Inc.", 2, 3, 3, 3);
greetingButton = addButton      ("Start" ,1,3,1,1);
}
 
//Button clicked to start game
 
public void buttonClicked(JButton buttonObj)
{
  this.setVisible(false);
  math3 test = new math3();
  test.setVisible(true);
  test.setSize(500, 500);
 
//First grade selected
 
//public void buttonClicked  (JButton button)
  //{
if (buttonObj == grade1Button)
{
JOptionPane.showMessageDialog(null, "Hi");
//Generate numbers for First Grade problem
 
     int generator1 = generator.nextInt(5);
     int generator2 = generator.nextInt(5);
 
//Select type of problem 
 
//instantiates and add window objects to the window
 
 
     }
 
      //public void buttonClicked  (JButton buttonObj)
 
 
     //{
 
//local variables
 
        Math2 math1 = new Math2();
 
//determine which button was clicked
 
         if (buttonObj == grade2Button)
 
      {
 
//setting and getting the numbers for the equations
 
        math1.setaddition(Double.parseDouble(additionField.getText()));
        //subtractionField.setNumber(math1.getsubtraction());
        //math1.setmultiplication(Double.parseDouble(multiplicationField.getText()));
        //divisionField.setNumber (math1.getdivision());
        //math1.setrandom(randomField.getText());
         }
}
 
class math3 extends GBFrame
{
 //Select grade level - Instantiate and add window objects to grade level window
JLabel gradeLabel = addLabel("Please select grade level of math problem.", 1, 1, 1, 1);// ,1,1,1,1);
JButton grade1Button = addButton  ("First Grade" ,1,1,1,1);
JButton grade2Button = addButton  ("Second Grade" ,2, 1,1,1);
JButton grade3Button = addButton  ("Third Grade" ,3,1,1,1);
JButton grade4Button = addButton  ("Fourth Grade" ,4,1,1,1);
JButton quitButton = addButton  ("Quit" ,5,1,1,1); 
JButton gobackButton = addButton ("Revert Back" ,6,1,1,1);
 
public void buttonClicked(JButton buttonObj)
{
 
if (buttonObj == quitButton)
System.exit(0);
 
if (buttonObj == gobackButton)
{
    //Select grade level - Instantiate and add window objects to grade level window
 
    math3 s = new math3();
 
    gobackButton = addButton ("Revert Back" ,6,1,1,1);
 
}
 
 
if (buttonObj == grade1Button)
{
 
addButtons P = new addButtons();
 
this.setVisible(false);
P.setVisible(true);
P.setSize(700, 700);
 
}
}
}
  public static void main(String [] args)
  {
   Frame frm = new Math(); 
   frm.setSize(500,500);
   frm.setVisible(true);
 
  }
 
class Math2
 
{
 
private double Mathsubtraction;
 
public void setaddition(double math)
 
{
 
Mathsubtraction = math;
 
}
 
public double setsubtraction(double math)
 
{
 
return Mathsubtraction;
 
}
 
public double getsubtraction()
 
{
 
return Mathsubtraction;
 
}
 
public double getaddition()
 
{
        double Mathaddition = 0;
 
return Mathaddition;
 
}
 
    String getdivision() {
        throw new UnsupportedOperationException("Not yet implemented");
    }
 
    void setdivision(double parseDouble) {
        throw new UnsupportedOperationException("Not yet implemented");
    }
 
    void setmultiplication(double parseDouble) {
        throw new UnsupportedOperationException("Not yet implemented");
    }
 
    void setrandom(double parseDouble) {
        throw new UnsupportedOperationException("Not yet implemented");
    }
 
    void getrandom() {
        throw new UnsupportedOperationException("Not yet implemented");
}
 
      } 
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
 
 
/**
 *
 * @author Tyler
 */
class math2 {
 
    void setaddition(double parseDouble) {
        throw new UnsupportedOperationException("Not yet implemented");
    }
 
}
 
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
/**
 *
 * @author TBoden
 */
class addButtons extends GBFrame
{
     JLabel additionLabel = addLabel         ("Addition" ,1,2,1,1);
      JLabel subtractionLabel = addLabel      ("Subtraction" ,1,3,1,1);
      JLabel multiplicationLabel = addLabel   ("Multiplication" ,1,4,1,1);
      JLabel divisionLabel = addLabel         ("Division" ,1,5,1,1);
      JLabel randomLabel = addLabel      ("Random" ,1,6,1,1);
      JLabel gobackLabel = addLabel      ("Revert Back" ,1,7,1,1);
 
      JTextField additionField = new JTextField("0");
      JTextField subtractionField = new JTextField("0");
      JTextField multiplicationField = new JTextField("0");
      JTextField divisionField = new JTextField("0");
      JTextField randomField = new JTextField("0");
      JTextField gobackField = new JTextField("0");
 
      JButton additionButton = addButton         ("1+1" ,1,5/3,1,1);
      JButton subtractionButton = addButton      ("1-1" ,4,1,1,1);
      JButton multiplicationButton = addButton   ("1*1" ,5,1,1,1);
      JButton divisionButton = addButton       ("1/1" ,6,1,1,1);
      JButton randomButton = addButton        ("Random Equation"  ,7,1,1,1);
      JButton gobackButton = addButton        ("Revert Back" ,8,1,1,1);
 
      public void buttonClicked(JButton buttonObj)
        {
 
      if (buttonObj == additionButton)
      {
          Math4 m = new Math4();
 
      this.setVisible(false);
      m.setVisible(true);
      m.setSize(700, 700); 
      }
      if (buttonObj == subtractionButton)
      {
 
      Math5 m = new Math5();
 
      this.setVisible(false);
      m.setVisible(true);
      m.setSize(700, 700);
      }
 
if (buttonObj == multiplicationButton)
{
 
      Math6 m = new Math6();
 
      this.setVisible(false);
      m.setVisible(true);
      m.setSize(700, 700);    
}
 
 if (buttonObj == divisionButton)
      {
 
      Math12 m = new Math12();
 
      this.setVisible(false);
      m.setVisible(true);
      m.setSize(700, 700);
 
    }
 
       if (buttonObj == randomButton)
      {
 
      Math7 m = new Math7();
 
      this.setVisible(false);
      m.setVisible(true);
      m.setSize(700, 700);
 
    }
 
      } 
 
 
 class Math12 extends GBFrame{
   Random generator = new Random();
 
    private JButton SubmitButton = addButton ("Submit Answer" ,1,9/8,1,1);
    int generator1 = generator.nextInt(20)+1/2;
    int generator2 = generator.nextInt(20)+1/2;
    int answer = generator1/generator2;
 
    JTextField answerField = addTextField("" ,3/2,2,1,1);
 
    JLabel questionLabel = addLabel(generator1 + "/" + generator2 + "=" ,1,30/23,20,20);
 
  }
 
 class Math4 extends GBFrame{
 
 public void additionClicked()
 {
     Random generator = new Random();
 
 
    private JButton SubmitButton = addButton ("Submit Answer" ,1,9/8,1,1);
    int generator1 = generator.nextInt(9)+1;
    int generator2 = generator.nextInt(9)+1; 
    int answer = generator1+generator2;
 
    JTextField answerField =  addTextField("" ,3/2,2,1,1);
 
    JLabel questionLabel =  addLabel(generator1 + "+" + generator2 +"=" ,1,30/23,20,20);
 
    if (answer == 1)
    {
 
    }
     }
 
 
 }
 
 
 class Math6 extends GBFrame{
    Random generator = new Random();
 
    private JButton SubmitButton = addButton ("Submit Answer" ,1,9/8,1,1);
    int generator1 = generator.nextInt(5)+1;
    int generator2 = generator.nextInt(5)+1;
    int answer = generator1*generator2;
 
    JTextField answerField = addTextField("" ,3/2,2,1,1);
 
    JLabel questionLabel = addLabel(generator1 + "*" + generator2 + "=" ,1,30/23,20,20);
 
  }
 
 class Math5 extends GBFrame{
 
    Random generator = new Random();
 
    private JButton SubmitButton = addButton ("Submit Answer" ,1,9/8,1,1);
    int generator1 = generator.nextInt(9)+1;
    int generator2 = generator.nextInt(9)+1;
    int answer = generator1-generator2;
 
    JTextField answerField = addTextField("" ,3/2,2,1,1);
 
    JLabel questionLabel = addLabel(generator1 + "-" + generator2 + "=" ,1,30/23,20,20);
 
}
 class Math7 extends GBFrame{
 
    Random generator = new Random();
 
    private JButton SubmitButton = addButton ("Submit Answer" ,1,9/8,1,1);
    int generator1 = generator.nextInt(9)+1;
    int generator2 = generator.nextInt(9)+1;
    int counter = generator.nextInt(4)+1;
 
 
    int answer = generator1+generator2;
    JLabel questionLabel = addLabel(generator1 + "+" + generator2 + "=" ,1,30/23,20,20);
 
 
 
    JTextField answerField = addTextField("" ,3/2,2,1,1);
 
 
 
 }
 
}
 
//"Math is our Game" - A math testing program for First through Fourth grade students
 
//Import GUI packages
 

import javax.swing.*;
import BreezySwing.*;
import java.awt.*; 
import java.util.Random; 
//import TurtleGraphics.*;
 
public class Math extends GBFrame
{
 
//declare variables for the window objects
 
private JLabel         greetingLabel;
private JLabel         additionLabel;
private JLabel         subtractionLabel;
private JLabel         multiplicationLabel;
private JLabel         divisionLabel;
private JLabel         randomLabel;
private JLabel         grade1Label;
private JLabel         grade2Label;
private JLabel         inputLabel;
private JLabel         gradeLabel;
private JLabel         questionLabel; 
 
private JTextField     greetingField;
private JTextField     additionField;
private JTextField     subtractionField;
private JTextField     multiplicationField;
private JTextField     divisionField;
private JTextField     randomField;
private JTextField     grade1Field;
private JTextField     grade2Field;
private JTextField     inputField;
private JTextField     questionField; 
 
private JButton         greetingButton;
private JButton         additionButton;
private JButton         subtractionButton;
private JButton         multiplicationButton;
private JButton         divisionButton;
private JButton         randomButton;    
private JButton         grade1Button;
private JButton         grade2Button;
private JButton         grade3Button;
private JButton         grade4Button;
private JButton         inputButton;
private JButton         quitButton;
private JButton         questionButton; 
/*int generator1=0;
int generator2=0;
int generator3=0;
int generator4=0;*/
 
JTextArea greetingArea;
 
Random generator = new Random(5);
//constructor
public Math()
{
   setUp();
}
 
//Open greeting screen with welcome and Start button
public void setUp()
{
greetingLabel = addLabel("Greeting", 1, 1, 1, 1);//greetingLabel.setText("Greeting"); //= addLabel      ("Greeting" ,1,1,1,1);
greetingArea = addTextArea("Welcome to Math is our Game, \na math skills program by \nNine Fingers and Ten Toes Software, Inc.", 2, 3, 3, 3);
greetingButton = addButton      ("Start" ,1,3,1,1);
}
 
//Button clicked to start game
 
public void buttonClicked(JButton buttonObj)
{
  this.setVisible(false);
  math3 test = new math3();
  test.setVisible(true);
  test.setSize(500, 500);
 
//First grade selected
 
//public void buttonClicked  (JButton button)
  //{
if (buttonObj == grade1Button)
{
JOptionPane.showMessageDialog(null, "Hi");
//Generate numbers for First Grade problem
 
     int generator1 = generator.nextInt(5);
     int generator2 = generator.nextInt(5);
 
//Select type of problem 
 
//instantiates and add window objects to the window
 
  
     }
 
      //public void buttonClicked  (JButton buttonObj)
 

     //{
 
//local variables
 
        Math2 math1 = new Math2();
 
//determine which button was clicked
 
         if (buttonObj == grade2Button)
 
      {
          
//setting and getting the numbers for the equations
 
        math1.setaddition(Double.parseDouble(additionField.getText()));
        //subtractionField.setNumber(math1.getsubtraction());
        //math1.setmultiplication(Double.parseDouble(multiplicationField.getText()));
        //divisionField.setNumber (math1.getdivision());
        //math1.setrandom(randomField.getText());
         }
}
 
class math3 extends GBFrame
{
 //Select grade level - Instantiate and add window objects to grade level window
JLabel gradeLabel = addLabel("Please select grade level of math problem.", 1, 1, 1, 1);// ,1,1,1,1);
JButton grade1Button = addButton  ("First Grade" ,1,1,1,1);
JButton grade2Button = addButton  ("Second Grade" ,2, 1,1,1);
JButton grade3Button = addButton  ("Third Grade" ,3,1,1,1);
JButton grade4Button = addButton  ("Fourth Grade" ,4,1,1,1);
JButton quitButton = addButton  ("Quit" ,5,1,1,1); 
JButton gobackButton = addButton ("Revert Back" ,6,1,1,1);
 
public void buttonClicked(JButton buttonObj)
{
 
if (buttonObj == quitButton)
System.exit(0);
 
if (buttonObj == gobackButton)
{
    //Select grade level - Instantiate and add window objects to grade level window
 
    math3 s = new math3();
    
    gobackButton = addButton ("Revert Back" ,6,1,1,1);
      
}
 

if (buttonObj == grade1Button)
{

addButtons P = new addButtons();
 
this.setVisible(false);
P.setVisible(true);
P.setSize(700, 700);
 
}
}
}
  public static void main(String [] args)
  {
   Frame frm = new Math(); 
   frm.setSize(500,500);
   frm.setVisible(true);
  
  }

class Math2
 
{
 
private double Mathsubtraction;
 
public void setaddition(double math)
 
{
 
Mathsubtraction = math;
 
}
 
public double setsubtraction(double math)
 
{
 
return Mathsubtraction;
 
}
 
public double getsubtraction()
 
{
 
return Mathsubtraction;
 
}
 
public double getaddition()
 
{
        double Mathaddition = 0;
 
return Mathaddition;
 
}
 
    String getdivision() {
        throw new UnsupportedOperationException("Not yet implemented");
    }
 
    void setdivision(double parseDouble) {
        throw new UnsupportedOperationException("Not yet implemented");
    }
 
    void setmultiplication(double parseDouble) {
        throw new UnsupportedOperationException("Not yet implemented");
    }
 
    void setrandom(double parseDouble) {
        throw new UnsupportedOperationException("Not yet implemented");
    }

    void getrandom() {
        throw new UnsupportedOperationException("Not yet implemented");
}
 
      } 
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
 
 
/**
 *
 * @author Tyler
 */
class math2 {
 
    void setaddition(double parseDouble) {
        throw new UnsupportedOperationException("Not yet implemented");
    }
 
}
 
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
/**
 *
 * @author TBoden
 */
class addButtons extends GBFrame
{
     JLabel additionLabel = addLabel         ("Addition" ,1,2,1,1);
      JLabel subtractionLabel = addLabel      ("Subtraction" ,1,3,1,1);
      JLabel multiplicationLabel = addLabel   ("Multiplication" ,1,4,1,1);
      JLabel divisionLabel = addLabel         ("Division" ,1,5,1,1);
      JLabel randomLabel = addLabel      ("Random" ,1,6,1,1);
      JLabel gobackLabel = addLabel      ("Revert Back" ,1,7,1,1);
      
      JTextField additionField = new JTextField("0");
      JTextField subtractionField = new JTextField("0");
      JTextField multiplicationField = new JTextField("0");
      JTextField divisionField = new JTextField("0");
      JTextField randomField = new JTextField("0");
      JTextField gobackField = new JTextField("0");
      
      JButton additionButton = addButton         ("1+1" ,1,5/3,1,1);
      JButton subtractionButton = addButton      ("1-1" ,4,1,1,1);
      JButton multiplicationButton = addButton   ("1*1" ,5,1,1,1);
      JButton divisionButton = addButton       ("1/1" ,6,1,1,1);
      JButton randomButton = addButton        ("Random Equation"  ,7,1,1,1);
      JButton gobackButton = addButton        ("Revert Back" ,8,1,1,1);
   
      public void buttonClicked(JButton buttonObj)
        {
 
      if (buttonObj == additionButton)
      {
          Math4 m = new Math4();
      
      this.setVisible(false);
      m.setVisible(true);
      m.setSize(700, 700); 
      }
      if (buttonObj == subtractionButton)
      {
      
      Math5 m = new Math5();
      
      this.setVisible(false);
      m.setVisible(true);
      m.setSize(700, 700);
      }
      
if (buttonObj == multiplicationButton)
{
      
      Math6 m = new Math6();
      
      this.setVisible(false);
      m.setVisible(true);
      m.setSize(700, 700);    
}
 
 if (buttonObj == divisionButton)
      {
      
      Math12 m = new Math12();
      
      this.setVisible(false);
      m.setVisible(true);
      m.setSize(700, 700);
          
    }
      
       if (buttonObj == randomButton)
      {
      
      Math7 m = new Math7();
      
      this.setVisible(false);
      m.setVisible(true);
      m.setSize(700, 700);
          
    }
       
      } 
      
      
 class Math12 extends GBFrame{
   Random generator = new Random();
    
    private JButton SubmitButton = addButton ("Submit Answer" ,1,9/8,1,1);
    int generator1 = generator.nextInt(20)+1/2;
    int generator2 = generator.nextInt(20)+1/2;
    int answer = generator1/generator2;
    
    JTextField answerField = addTextField("" ,3/2,2,1,1);
    
    JLabel questionLabel = addLabel(generator1 + "/" + generator2 + "=" ,1,30/23,20,20);
  
  }
 
 class Math4 extends GBFrame{
 
 public void additionClicked()
 {
     Random generator = new Random();
    
    
    private JButton SubmitButton = addButton ("Submit Answer" ,1,9/8,1,1);
    int generator1 = generator.nextInt(9)+1;
    int generator2 = generator.nextInt(9)+1; 
    int answer = generator1+generator2;
    
    JTextField answerField =  addTextField("" ,3/2,2,1,1);
    
    JLabel questionLabel =  addLabel(generator1 + "+" + generator2 +"=" ,1,30/23,20,20);
    
    if (answer == 1)
    {
   
    }
     }
 
 
 }

 
 class Math6 extends GBFrame{
    Random generator = new Random();
    
    private JButton SubmitButton = addButton ("Submit Answer" ,1,9/8,1,1);
    int generator1 = generator.nextInt(5)+1;
    int generator2 = generator.nextInt(5)+1;
    int answer = generator1*generator2;
    
    JTextField answerField = addTextField("" ,3/2,2,1,1);
    
    JLabel questionLabel = addLabel(generator1 + "*" + generator2 + "=" ,1,30/23,20,20);
      
  }
 
 class Math5 extends GBFrame{
    
    Random generator = new Random();
    
    private JButton SubmitButton = addButton ("Submit Answer" ,1,9/8,1,1);
    int generator1 = generator.nextInt(9)+1;
    int generator2 = generator.nextInt(9)+1;
    int answer = generator1-generator2;
    
    JTextField answerField = addTextField("" ,3/2,2,1,1);
    
    JLabel questionLabel = addLabel(generator1 + "-" + generator2 + "=" ,1,30/23,20,20);
    
}
 class Math7 extends GBFrame{
      
    Random generator = new Random();
    
    private JButton SubmitButton = addButton ("Submit Answer" ,1,9/8,1,1);
    int generator1 = generator.nextInt(9)+1;
    int generator2 = generator.nextInt(9)+1;
    int counter = generator.nextInt(4)+1;
   
    
    int answer = generator1+generator2;
    JLabel questionLabel = addLabel(generator1 + "+" + generator2 + "=" ,1,30/23,20,20);
    
    
    
    JTextField answerField = addTextField("" ,3/2,2,1,1);
    
    
    
 }

}

the errorers are at:
class Math4 extends GBFrame{

public void additionClicked()
{
Random generator = new Random();

private JButton SubmitButton = addButton ("Submit Answer" ,1,9/8,1,1);
int generator1 = generator.nextInt(9)+1;
int generator2 = generator.nextInt(9)+1;
int answer = generator1+generator2;

JTextField answerField = addTextField("" ,3/2,2,1,1);

JLabel questionLabel = addLabel(generator1 + "+" + generator2 +"=" ,1,30/23,20,20);

if (answer == 1)
{

}
}

Note: I know the code is not formatted well, with spaces and tabs. Sorry, it is no my code it is a student who I am helping.

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Re: Identifier expected and Illegal start of Expression errors

Jan 14th, 2009

If you expect a solution, please post the exact error code you are getting. It usually includes line numbers and method names, etc.

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Re: Identifier expected and Illegal start of Expression errors

Jan 14th, 2009

•

Originally Posted by christiangirl

Note: I know the code is not formatted well, with spaces and tabs. Sorry, it is no my code it is a student who I am helping.

Use an advanced IDE like Eclipse or Netbeans, they have features like autoformat using which you can automatically format any code, no matter how badly it is written.

And just as BestJewSinceJC said, paste the exact error (without editing it) the compiler is throwing up.

"Any fool can write code that a computer can understand. Good programmers write code that humans can understand."

"How to ask questions the smart way ?"

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Re: Identifier expected and Illegal start of Expression errors

Jan 14th, 2009

The helper himself needs help ? Better tell the student to look at other places for solution I guess that way he would reach the solution faster. Why follow a bigger loop of he asking you and you asking us, that way he won't be able to understand how one got to the solution ain't it true ?

Last edited by verruckt24; Jan 14th, 2009 at 3:04 am.

Get up every morning and take a look at the Forbes' list of richest people. If your name doesn't appear.... GET TO WORK !!!

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Re: Identifier expected and Illegal start of Expression errors

Jan 14th, 2009

I am tutoring him, and ya sometimes I need help. And I will make sure he understnds the solution.

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Re: Identifier expected and Illegal start of Expression errors

Jan 14th, 2009

•

Originally Posted by christiangirl

I am tutoring him, and ya sometimes I need help. And I will make sure he understnds the solution.

But how about you understanding us and pasting the exact compiler error and helping us help you help him ???

Last edited by stephen84s; Jan 14th, 2009 at 3:56 am.

"Any fool can write code that a computer can understand. Good programmers write code that humans can understand."

"How to ask questions the smart way ?"

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Re: Identifier expected and Illegal start of Expression errors

Jan 14th, 2009

And heres the errors:
File: F:\Math.java [line: 384]
Error: F:\Math.java:384: illegal start of type
File: F:\Math.java [line: 384]
Error: F:\Math.java:384: <identifier> expected
File: F:\Math.java [line: 384]
Error: F:\Math.java:384: ';' expected

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Re: Identifier expected and Illegal start of Expression errors

Jan 14th, 2009

Sorry it took me longer to post the errors, I didnt see that someone else had replied.

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Re: Identifier expected and Illegal start of Expression errors

Jan 14th, 2009

 Help with Code Tags 
 java Syntax (Toggle Plain Text) 
private JButton SubmitButton = addButton ("Submit Answer" ,1,9/8,1,1);
private JButton SubmitButton = addButton ("Submit Answer" ,1,9/8,1,1);

I think this is the problem, I do not see any addButton() function in your class Math4, which returns an object of type JButton.

I suggest both you and your student to go through this tutorial to get your concepts on creating GUI with swing right.

"Any fool can write code that a computer can understand. Good programmers write code that humans can understand."

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Re: Identifier expected and Illegal start of Expression errors

#10

Jan 14th, 2009

> int generator1 = generator.nextInt(20)+1/2;

Operator precedence anyone?

> /*
> * To change this template, choose Tools | Templates
> * and open the template in the editor.
> */

I am surprised how someone can churn out such an unformatted code even after using an IDE / advanced text editor.

> class Math12 { /* */ }
> class Math5 { /* */ }
> class Math7 { /* */ }

The very fact that multiple classes are created which do the same thing is a clear indication of design problems with the application. Consider customizing the class instance by having constructors/factory methods.

...and many other things.

If your friend really wants to learn, tell him to start some serious reading. A lot of beginner resources are mentioned in the sticky; starting with the Java beginner tutorials ain't that bad an idea.

I don't accept change; I don't deserve to live.