Three JButtons for different plots

Question

I have created three buttons which create different plots. e.g. If Noise is pressed Noise chart is displayed but if after this Noisy is pressed an exception is thrown. What changes are required so that all buttons can work without repeated execution. Here is the code.

package project;

   /*
    * @author Abdul Baseer
    */
    public class Buttons extends JFrame{
        protected JButton Noise, Noisy, Filtered,FFT;
        public Buttons(){
           super("Adaptive Filtering");
           setLayout(new FlowLayout());

        Noise=new JButton("Noise Data");
        Noise.setBackground(Color.red);
        add(Noise);
        Noisy=new JButton("Noise+Data");
        Noisy.setBackground(Color.yellow);
        add(Noisy);
        Filtered=new JButton("Filtered Data");
        Filtered.setBackground(Color.green);
        add(Filtered);
        ButtonHandler handler=new ButtonHandler();
        Noisy.addActionListener(handler);
        Noise.addActionListener(handler);
        Filtered.addActionListener(handler);

    }
    private class ButtonHandler implements ActionListener{
                String t = JOptionPane.showInputDialog("Observation Time in seconds");
                double T=Double.parseDouble(t);
                @Override
                public void actionPerformed(ActionEvent event){
                try {
                Capture c=new Capture();
                byte[]b = c.Capture(T);    
                int n=b.length;
                double[]X=new double[n/4];
                double[]Y=new double[n/4];
                for(int i=0;i<n/4;i++){
                    X[i]=(3*((b[i*4]&0xff)|(b[i*4+1]<<8))/32768.0f);
                    Y[i]=((b[i*4+2]&0xff)|(b[i*4+3]<<8))/32768.0f;
                }
                if(event.getSource()==Noise){
                    Plot px=new Plot("Noise","Samples","Amplitude",X);
                    FFT F=new FFT();
                    double[]XX=F.FFT(X);
                    Plot fxp=new Plot("Noise Spectrum","Samples","Magnitude|X[k|",XX);                            
                            }
                if(event.getSource()==Noisy){
                    Plot py=new Plot("Noisy","Samples","Amplitude",Y);
                    FFT F=new FFT();
                    double[]YY=F.FFT(Y);
                    Plot fyp=new Plot("Noisy Spectrum","Samples","Magnitude|Y[k|",YY);    
                            }
                if(event.getSource()==Filtered){       
                     String l = JOptionPane.showInputDialog("Filter Order");
                     int L=Integer.parseInt(l);
                     String u = JOptionPane.showInputDialog("Step Size");
                     double U=Double.parseDouble(u);
                     LMS LM=new LMS();
                     double[]E=LM.LMS(L,U,X, Y);
                     ComPlot pe=new ComPlot("",Y,E);
                     FFT F=new FFT();
                     double[]EE=F.FFT(E);
                     Plot fep=new Plot("Filtered Spectrum","Samples","Magnitude|E[k|",EE);           
                            }
                } catch (LineUnavailableException | HeadlessException | NumberFormatException ex) {
                        System.out.println("Unsupported");
                    }
                }
    }
}

What line causes the exception to be thrown? Can you post your exception's stacktrace? It helps us greatly to actually see the exception in all its gory detail. — Hovercraft Full Of Eels, Jun 23 '13 at 19:12
Also, your catch block is very non-informative. Consider having an `ex.printStackTrace()` in there. — Hovercraft Full Of Eels, Jun 23 '13 at 19:13
Follow Java naming conventions. Variable names should NOT start with an upper case character. — camickr, Jun 23 '13 at 19:26

score 2 · Answer 1 · edited May 23 '17 at 12:06

2

Instead of three different instances of a notional Plot class, consider a single renderer that can conditionally display one or more series. In this example, the setSeriesVisible() method controls the display of a series, and each series button's Action invokes it accordingly. Similarly, the Action for each plot button updates its own series.

edited May 23 '17 at 12:06

Community

1
1

answered Jun 23 '13 at 21:19

trashgod

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Three JButtons for different plots

1 Answers1