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Hi, I am trying to write an application that will calculate the volume of a pool with fixed length and width. The user will be prompted to enter 2 values for depth. The application should draw a cross-section of the pool using length, deep end and shallow end. A part of the assignment is asking for a user defined method to draw the cross-section of the pool. I am having difficulties with this part. Here's my code: ( lines 15-18)

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import static javax.swing.JFrame.EXIT_ON_CLOSE;

public class SwimmingPool extends JFrame

  implements ActionListener {
  private JPanel panel;
  private JButton button;
  private int length = 20;
  private int width = 5;
  int x = 10;
  int y = 10;
  private void drawPool( Graphics g, int x, int y, int deepEnd, int shallowEnd, int length){
      Graphics paper = panel.getGraphics();
      paper.drawPool( x, y,  deepEnd,  shallowEnd, length);
  }
  public static void main(String[] args) {
    SwimmingPool frame = new SwimmingPool();
    frame.setSize(600, 600);
    frame.createGUI();
    frame.setVisible(true);
  }

  private void createGUI() {
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    Container window = getContentPane();
    window.setLayout(new FlowLayout() );
    panel = new JPanel();
    panel.setPreferredSize(new Dimension(500,500));
    panel.setBackground(Color.white);
    window.add(panel);
    button = new JButton("Press me");
    window.add(button);
    button.addActionListener(this);
  }
  public void actionPerformed(ActionEvent event) {
    int deepEnd;
    int shallowEnd;
    double volume;
    Graphics paper = panel.getGraphics();

    String inputString;//used to read an input

    inputString = JOptionPane.showInputDialog("Deep End: ");
    deepEnd = Integer.parseInt(inputString);
    inputString = JOptionPane.showInputDialog("Shallow End: ");
    shallowEnd = Integer.parseInt(inputString);

    volume = ((deepEnd+shallowEnd)/2) * length * width;
    JOptionPane.showMessageDialog(null," voulme:" + volume);


  }


}
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Last Post by JamesCherrill
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A part of the assignment is asking for a user defined method to draw the cross-section of the pool. I am having difficulties with this part.
Does that answer your question?

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no, that does not answer my question.
that is not the question you are asking. that is the question asked to you.
so, what is it you're having a problem with?

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I keep getting an error at line 17. It says cannot find symbol method drawPool. How can I correctly define a method and get it to work? Looking at my code, where do you think I made a mistake?

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You have not defined a drawPool method, swo obviously you cannot call it! You need to write a method that will use one or more draw... methods from the Graphics class to draw the pool cross-section - eg call drawLine four times to draw the top surface, botton, deep end side and shallow end side.

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