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POaccessing a variable from another class
 

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    <p>Very simple question but I can't do it. I have 3 classes:</p> <p><strong><code>DrawCircle</code> class</strong></p> <pre><code>import java.awt.*; import java.awt.event.*; import javax.swing.*; class DrawCircle extends JPanel { private int w, h, di, diBig, diSmall, maxRad, xSq, ySq, xPoint, yPoint; public DrawFrame d; public DrawCircle() { w = 400; h = 400; diBig = 300; diSmall = 10; maxRad = (diBig/2) - diSmall; xSq = 50; ySq = 50; xPoint = 200; yPoint = 200; } public void paintComponent(Graphics g) { super.paintComponent(g); g.setColor(Color.blue); g.drawOval(xSq, ySq, diBig, diBig); for(int y=ySq; y&lt;ySq+diBig; y=y+diSmall*2) { for(int x=xSq; x&lt;w-xSq; x=x+diSmall) { if(Math.sqrt(Math.pow(yPoint-y,2) + Math.pow(xPoint-x, 2))&lt;= maxRad) { g.drawOval(x, y, diSmall, diSmall); } } } for(int y=ySq+10; y&lt;ySq+diBig; y=y+diSmall*2) { for(int x=xSq+5; x&lt;w-xSq; x=x+diSmall) { if(Math.sqrt(Math.pow(yPoint-y,2) + Math.pow(xPoint-x, 2))&lt;= maxRad) { g.drawOval(x, y, diSmall, diSmall); } } } } } </code></pre> <p><strong><code>DrawFrame</code> class</strong></p> <pre><code>public class DrawFrame extends JFrame { public DrawFrame() { int width = 400; int height = 400; setTitle("Frame"); setSize(width, height); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); Container contentPane = getContentPane(); contentPane.add(new DrawCircle()); } } </code></pre> <p><strong><code>CircMain</code> class</strong></p> <pre><code>import java.awt.*; import java.awt.event.*; import javax.swing.*; public class CircMain { public static void main(String[] args) { JFrame frame = new DrawFrame(); frame.show(); } } </code></pre> <p>One class creates a frame, the other draws a circle and fills it with smaller circles. In <code>DrawFrame</code> I set width and height. In <code>DrawCircle</code> I need to access the width and height of <code>DrawFrame</code>. How do I do this?</p> <p>I've tried making an object and tried using <code>.getWidth</code> and <code>.getHeight</code> but can't get it to work. I need specific code here because I've tried a lot of things but can't get it to work. Am I declaring width and height wrong in <code>DrawFrame</code>? Am creating the object the wrong way in <code>DrawCircle</code>?</p> <p>Also, the variables i use in <code>DrawCircle</code>, should I have them in the constructor or not?</p>
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