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POUsing ActionListener to update variables in other classes
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  1. POUsing ActionListener to update variables in other classes
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    copied!<p>I am designing an applet so it allows a user to plot a graph. I am having problems to construct a code which from another file (ControlsB.java) the variables in the Graph.java file are updated. Below is my code:</p> <pre><code> import java.awt.*; import javax.swing.*; public class Calculator extends JFrame{ /** * */ private static final long serialVersionUID = 1L; private static final int HORIZONTAL_SCROLLBAR_NEVER = 0; private static final int VERTICAL_SCROLLBAR_ALWAYS = 0; public static void main (String[] args){ JFrame calculator = new JFrame("My Simple Calculator"); calculator.setSize(500,500); JPanel panel = new JPanel(); panel.setLayout(new BorderLayout()); Box a = Box.createHorizontalBox(); JTextArea text = new JTextArea(10,15); </code></pre> <p>JScrollPane scroll = new JScrollPane(text, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,JScrollPane.HORIZONTAL_SCROLLBAR_NEVER); </p> <pre><code>Box b = Box.createHorizontalBox(); //JToolBar tool = new JToolBar(SwingConstants.HORIZONTAL); JButton add = new JButton("+"); JButton minus = new JButton("-"); JButton multi = new JButton("x"); JButton div = new JButton("/"); JButton c = new JButton("C"); JButton eq = new JButton("="); JTextField field = new JTextField(10); JButton enter = new JButton("Enter"); b.add(add); b.add(minus); b.add(multi); b.add(div); b.add(c); b.add(eq); a.add(field); a.add(enter); panel.add(scroll,BorderLayout.NORTH); panel.add(b,BorderLayout.CENTER); panel.add(a,BorderLayout.SOUTH); calculator.setContentPane(panel); calculator.setVisible(true); } } </code></pre> <p>Now my main concerns are in the ControlsB.java file, where I want that when the user inputs the the x-axis and y-axis <strong>ranges</strong> and hits the button <strong>Resize</strong> the variables in the graph.java file are updated accordingly and thus the graph resizes.</p> <p><em>The variables which I am talking about in Graph.java file are in lines between 57 and 65.</em></p> <p>Thanks</p>
 

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