Java arithmetic test Applet

 

TestFrame. java

Import javax. swing .*;

Import java. awt. FlowLayout;

Import java. awt. event .*;

 

Public class TestFrame extends JFrame implements ActionListener

{

JTextField textOne, textTwo, textResult;

JButton getProblem, givean.pdf;

JLabel operatorJLabel, message;

TestOperator testOperator;

 

Public TestFrame ()

{

TestOperator = new TestOperator ();

SetLayout (new FlowLayout ());

TextOne = new JTextField (10); // create textOne with a visible length of 10 Characters

TextTwo = new JTextField (10); // create textTwo. The visible character length is 10.

TextResult = new JTextField (10); // create a textResult. The visible character length is 10.

OperatorJLabel = new JLabel ("+ ");

Message = new JLabel ("You have not answered yet ");

GetProblem = new JButton ("obtain question ");

Giveanbutton = new JButton ("Confirm answer ");

 

Add (getProblem );

Add (textOne );

Add (operatorJLabel );

Add (textTwo );

Add (new JLabel ("= "));

Add (textResult );

Add (giveAnwser );

Add (message );

 

TextOne. setEditable (false );

TextTwo. setEditable (false );

GetProblem. addActionListener (this); // ActionEvent monitor registered as getProblem in the current window

Giveanener. addActionListener (this); // The ActionEvent event monitor registered as giveAnwser in the current window

TextResult. addActionListener (this); // ActionEvent monitor registered as textResult in the current window

}

Public void actionreceivmed (ActionEvent e)

{

If (e. getSource () = getProblem) // determine whether the event source is getProblem

{

Int number1 = testOperator. giveNumberOne (100 );

Int number2 = testOperator. giveNumberTwo (100 );

String operator = testOperator. giveOperator ();

TextOne. setText ("" + number1 );

TextTwo. setText ("" + number2 );

OperatorJLabel. setText (operator );

Message. setText ("Please answer ");

TextResult. setText (null );

}

If (e. getSource () = givean) // determine whether the event source is giveAnwser

{

String answer = textResult. getText ();

Try {int result = Integer. parseInt (answer );

If (testOperator. getRight (result) = true)

{

Message. setText ("your answer is correct ");

}

Else

{

Message. setText ("your answer is incorrect ");

}

}

Catch (NumberFormatException ex)

{

Message. setText ("enter a number character ");

}

}

}

}

TestOperator. java

Public class TestOperator

{

Int numberOne, numberTwo;

String operator = "";

Boolean right;

 

// Generate the first number randomly

Public int giveNumberOne (int n)

{

NumberOne = (int) (Math. random () * n) + 1; // forcibly converted to int type

// Because Math. random () returns the double type

Return numberOne;

}

 

// Generate the second number randomly

Public int giveNumberTwo (int n)

{

NumberTwo = (int) (Math. random () * n) + 1;

Return numberTwo;

}

 

// Randomly generate the operator number

Public String giveOperator ()

{

Double d = Math. random ();

If (d >=0 & d <0.25)

Operator = "+ ";

 

Else if (d> 0.25 & d <= 0.5)

Operator = "-";

Else if (d> 0.5 & d <= 0.75)

Operator = "*";

Else

Operator = "/";

Return operator;

}

 

// Determine whether the test result is correct

Public boolean getRight (int answer)

{

If (operator. equals ("+ "))

{

If (answer = numberOne + numberTwo)

Right = true;

 

Else

Right = false;

 

}

 

Else if (operator. equals ("-"))

{

If (answer = numberOne-numberTwo)

Right = true;

 

Else

Right = false;

}

Else if (operator. equals ("*"))

{

If (answer = numberOne * numberTwo)

Right = true;

 

Else

Right = false;

}

Else if (operator. equals ("/"))

{

If (answer = numberOne/numberTwo)

Right = true;

 

Else

Right = false;

}

Return right;

}

}

MainClass. java

Import javax. swing. JFrame;

Import javax. swing. UIManager;

 

Public class MainClass

{

Public static void main (String args [])

{

Try {

UIManager. setLookAndFeel ("com. sun. java. swing. plaf. windows. WindowsLookAndFeel"); // windows interface style

} Catch (Exception e ){

E. printStackTrace ();

}

TestFrame frame = new TestFrame ();

Frame. setTitle ("arithmetic test applet ");

Frame. setBounds (100,100,500,100 );

Frame. setVisible (true );

Frame. setLocationRelativeTo (null); // The center of the form is displayed.

Frame. setdefaclocloseoperation (JFrame. EXIT_ON_CLOSE );

Frame. setResizable (false );

}

}

:

 

This article is from the "IT" blog