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Thread: JOptionPane error in eclipse

  1. #1
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    Default JOptionPane error in eclipse

    I am a beginner and I am I am practicing JOptionPane and trying to make this code work but the error message below keeps appearing. Please help me to sort it out.

    The solution you gave me in January was very helpful. How can I say thanks


    // Make calculations using three integers.

    import javax.swing.JOptionPane;
    public class Calculate3
    {
    public static void main( String[] args )
    {
    String firstNumber, secondNumber, thirdNumber;
    String result;
    int number1,number2,number3;
    int sum, largest, smallest, product, average;
    //read first number from user as string
    firstNumber = JOptionPane.showInputDialog( “Enter first number: ” );
    //read second number from user as a string
    secondNumber = JOptionPane.showInputDialog( “Enter second number: ” );
    //read third number from user as a string
    thirdNumber = JOptionPane.showInputDialog( “Enter third number: ” );
    //convert numbers from type String to type int
    number1 = Integer.parseInt( firstNumber );
    number2 = Integer.parseInt( secondNumber );
    number3 = Integer.parseInt( thirdNumber );
    //initialize largest and smallest
    largest = number1;
    smallest = number2;
    //determine correct values
    if ( number2 >= number1 )
    {
    largest = number2;
    smallest = number1;
    }
    if ( number3 > largest )
    largest = number3;
    if ( number3 < smallest )
    smallest = number3;
    //perform calculations
    sum = number1 + number2 + number3;
    product = number1 * number2 * number3;
    average = sum/3;
    //print results
    result = “For the numbers ” + number1 + "" + number2 + "" + number3 +
    ” \n ” + “The largest is ” + largest + ” \n ” +
    “The smallest is ” + smallest + " \n" + “The sum is ” + sum +
    "\n" + “The product is ” + product + "\n" +
    “The average is ” + average + ” \n ;
    //display the results
    JOptionPane.showMessageDialog( null, result, “Calculate results”,
    JOptionPane.INFORMATION_MESSAGE );
    System.exit(0);
    }
    }

    Error message

    Exception in thread "main" java.lang.Error: Unresolved compilation problems:
    The method showInputDialog(Object) in the type JOptionPane is not applicable for the arguments ()
    Syntax error on tokens, delete these tokens
    The method showInputDialog(Object) in the type JOptionPane is not applicable for the arguments ()
    Syntax error on tokens, delete these tokens
    The method showInputDialog(Object) in the type JOptionPane is not applicable for the arguments ()
    Syntax error on tokens, delete these tokens
    Syntax error on tokens, delete these tokens
    Syntax error on tokens, delete these tokens
    Syntax error on tokens, delete these tokens
    Syntax error on tokens, delete these tokens
    Syntax error on tokens, delete these tokens
    Syntax error on tokens, delete these tokens
    Syntax error on tokens, delete these tokens
    n cannot be resolved
    Syntax error on tokens, Expression expected instead

    at Calculate3.main(Calculate3.java:14)


  2. #2
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    Default Re: JOptionPane error in eclipse

    You could have said "Thanks" then.

    Please post your code, properly indented, in code tags.

    Your open and close quotes are the wrong kind of quotes. Be sure that whatever editor you're using is using the plain text version of the quote, ' " ', character. If you need help setting your editor to do that, let us know which one you're using.

  3. #3
    Super Moderator jps's Avatar
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    Default Re: JOptionPane error in eclipse

    The method showInputDialog(Object) in the type JOptionPane is not applicable for the arguments ()
    Check the documentation for use of the method

    Perhaps errors like this are the result of a missing or extra brace/bracket/semicolon/quote.... I would check all of those
    Please use code tags when posting code to the forum. Assistance can be found in the Announcements thread

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