JFreeChart не появляется, когда я нажимаю кнопку

Question

Я не вижу вывода для этого кода в панели, но в консольных точках (X, Y) выходят. Я искал все больше и больше.

Это класс UI:

/* 
* To change this license header, choose License Headers in Project Properties. 
* To change this template file, choose Tools | Templates 
* and open the template in the editor. 
*/ 
package com.dspTasks.UI; 
import dsp.ReadFile; 
import java.awt.BorderLayout; 
import java.io.FileNotFoundException; 
import java.util.ArrayList; 
import java.util.logging.Level; 
import java.util.logging.Logger; 
import javax.swing.JPanel; 
import org.jfree.*; 
import org.jfree.chart.ChartFactory; 
import org.jfree.chart.ChartPanel; 
import org.jfree.chart.JFreeChart; 
import org.jfree.chart.plot.PlotOrientation; 
import org.jfree.data.xy.XYDataset; 
import org.jfree.data.xy.XYSeries; 
import org.jfree.data.xy.XYSeriesCollection; 
/** 
* 
* @author fathy 
*/ 
public class out extends javax.swing.JFrame { 

/** 
* Creates new form out 
*/ 

public out() { 
    initComponents(); 
    this.setVisible(true); 

} 

/** 
* This method is called from within the constructor to initialize the form. 
* WARNING: Do NOT modify this code. The content of this method is always 
* regenerated by the Form Editor. 
*/ 
@SuppressWarnings("unchecked") 
// <editor-fold defaultstate="collapsed" desc="Generated Code">       
private void initComponents() { 

    jPanel1 = new javax.swing.JPanel(); 
    jLabel1 = new javax.swing.JLabel(); 
    jTextField1 = new javax.swing.JTextField(); 
    loadSignal1 = new javax.swing.JButton(); 
    run = new javax.swing.JButton(); 

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); 

    jLabel1.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N 
    jLabel1.setText("path"); 

    jTextField1.setToolTipText("file path"); 
    jTextField1.setName("path"); // NOI18N 

    loadSignal1.setText("load signal1"); 

    run.setText("run"); 
    run.addActionListener(new java.awt.event.ActionListener() { 
     public void actionPerformed(java.awt.event.ActionEvent evt) { 
      runActionPerformed(evt); 
     } 
    }); 

    javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1); 
    jPanel1.setLayout(jPanel1Layout); 
    jPanel1Layout.setHorizontalGroup(
     jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGroup(jPanel1Layout.createSequentialGroup() 
      .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
       .addGroup(jPanel1Layout.createSequentialGroup() 
        .addGap(391, 391, 391) 
        .addComponent(run)) 
       .addGroup(jPanel1Layout.createSequentialGroup() 
        .addGap(213, 213, 213) 
        .addComponent(loadSignal1)) 
       .addGroup(jPanel1Layout.createSequentialGroup() 
        .addGap(23, 23, 23) 
        .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 94, javax.swing.GroupLayout.PREFERRED_SIZE) 
        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) 
        .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 399, javax.swing.GroupLayout.PREFERRED_SIZE))) 
      .addContainerGap(392, Short.MAX_VALUE)) 
    ); 
    jPanel1Layout.setVerticalGroup(
     jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGroup(jPanel1Layout.createSequentialGroup() 
      .addContainerGap() 
      .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
       .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 29, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 29, javax.swing.GroupLayout.PREFERRED_SIZE)) 
      .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) 
      .addComponent(loadSignal1) 
      .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 360, Short.MAX_VALUE) 
      .addComponent(run)) 
    ); 

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); 
    getContentPane().setLayout(layout); 
    layout.setHorizontalGroup(
     layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGroup(layout.createSequentialGroup() 
      .addContainerGap() 
      .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
      .addContainerGap()) 
    ); 
    layout.setVerticalGroup(
     layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGroup(layout.createSequentialGroup() 
      .addContainerGap() 
      .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
      .addContainerGap()) 
    ); 

    pack(); 
}// </editor-fold>       

private void runActionPerformed(java.awt.event.ActionEvent evt) {          
    try { 
     JPanel chartPanel=createChartPanel(); 
     this.add(chartPanel,BorderLayout.CENTER); 
    } catch (FileNotFoundException ex) { 
     System.err.println(ex); 
    } 

}         

private JPanel createChartPanel() throws FileNotFoundException{ 
    String chartTitle="signal chart"; 
    String XLabel="Voltage(V)"; 
    String YLabel = "Time(T)"; 
    XYDataset dataset=createDataSet(); 
    JFreeChart chart= ChartFactory.createXYLineChart(YLabel, YLabel, YLabel, dataset); 
    return new ChartPanel(chart); 
} 
private XYDataset createDataSet() throws FileNotFoundException{ 
    XYSeriesCollection dataset=new XYSeriesCollection(); 
    XYSeries signal1=new XYSeries("signal1"); 
    //XYSeries signal2= new XYSeries("signal2"); 
    ArrayList dataSignal=ReadFile.readFile(); 
    for(int i=0;i<dataSignal.size();i++){ 
     signal1.add(i+1, (Double) dataSignal.get(i)); 
    } 
    dataset.addSeries(signal1); 
    for(int i=0;i<2000;i++){ 
     System.out.println(signal1.getDataItem(i)); 
    } 

    return dataset; 
} 
/** 
* @param args the command line arguments 
*/ 
public static void main(String args[]) { 
    /* Set the Nimbus look and feel */ 
    //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) "> 
    /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. 
    * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
    */ 
    try { 
     for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { 
      if ("Nimbus".equals(info.getName())) { 
       javax.swing.UIManager.setLookAndFeel(info.getClassName()); 
       break; 
      } 
     } 
    } catch (ClassNotFoundException ex) { 
     java.util.logging.Logger.getLogger(out.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } catch (InstantiationException ex) { 
     java.util.logging.Logger.getLogger(out.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } catch (IllegalAccessException ex) { 
     java.util.logging.Logger.getLogger(out.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } catch (javax.swing.UnsupportedLookAndFeelException ex) { 
     java.util.logging.Logger.getLogger(out.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } 
    //</editor-fold> 

    /* Create and display the form */ 
    java.awt.EventQueue.invokeLater(new Runnable() { 
     public void run() { 
      new out().setVisible(true); 
     } 
    }); 
} 

// Variables declaration - do not modify      
private javax.swing.JLabel jLabel1; 
private javax.swing.JPanel jPanel1; 
private javax.swing.JTextField jTextField1; 
private javax.swing.JButton loadSignal1; 
private javax.swing.JButton run; 
// End of variables declaration     

}

Класс считывает данные из файла сигнала, которые включают некоторые двойные номера, как это:

4 
3.99950652992664 
3.99802624146293 
3.99555949984788 
3.99210691371309 
3.98766933493251 
3.98224785841232 
3.97584382182072 
3.96845880525791 
3.96009463086623 
3.95075336238055 
3.94043730461910 
3.92914900291476 
3.91689124248706 
3.90366704775499 
3.88947968159071 
3.87433264451452 
3.85822967383119 
3.84117474270777 
3.82317205919332 
3.80422606518061 

чтения файла:

package dsp; 

import java.io.File; 
import java.io.FileNotFoundException; 
import java.util.ArrayList; 
import java.util.Scanner; 

/* 
* To change this license header, choose License Headers in Project Properties. 
* To change this template file, choose Tools | Templates 
* and open the template in the editor. 
*/ 

/** 
* 
* @author fathy 
*/ 
public class ReadFile { 


    public static ArrayList readFile() throws FileNotFoundException{ 
     ArrayList signalData= new ArrayList(); 

     Scanner input = new Scanner(new File("signal1")); 
     while(input.hasNext()){ 
      signalData.add(input.nextDouble()); 
     } 
     return signalData; 
    } 
} 

Answer 1

Вместо замена диаграмму в обработчике действий, просто обновления соответствующей серии в наборе данных диаграммы. Чтобы сделать приведенный ниже пример самодостаточным, я заменил readFile() и изменил тип возврата на List<Double>.

Я не понимаю, какую ошибку я делаю?

Попытка add() нового ChartPanel «аннулирует иерархию компонентов. Если уже отображается контейнер, иерархия должна быть подтверждена в дальнейшем для того, чтобы отобразить дополнительные компоненты.» Подход, показанный ниже, устраняет необходимость.

import java.awt.BorderLayout; 
import java.awt.EventQueue; 
import java.awt.FlowLayout; 
import java.awt.event.ActionEvent; 
import java.util.List; 
import java.util.Random; 
import java.util.stream.Collectors; 
import java.util.stream.Stream; 
import javax.swing.AbstractAction; 
import javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.JPanel; 
import org.jfree.chart.ChartFactory; 
import org.jfree.chart.ChartPanel; 
import org.jfree.chart.JFreeChart; 
import org.jfree.data.xy.XYSeries; 
import org.jfree.data.xy.XYSeriesCollection; 

/** 
* @see http://stackoverflow.com/a/37020264/230513 
*/ 
public class Test { 

    private final XYSeries signal = new XYSeries("signal"); 
    private final XYSeriesCollection dataset = new XYSeriesCollection(signal); 

    private void display() { 
     JFrame f = new JFrame("Test"); 
     f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     JFreeChart chart = ChartFactory.createXYLineChart(
      "Signal chart", "Time(T)", "Voltage(V)", dataset); 
     f.add(new ChartPanel(chart)); 
     JPanel p = new JPanel(new FlowLayout(FlowLayout.RIGHT)); 
     p.add(new JButton(new AbstractAction("Load signal") { 
      @Override 
      public void actionPerformed(ActionEvent e) { 
       signal.clear(); 
       List<Double> list = ReadFile.readFile(); 
       int i = 0; 
       for (Double d : list) { 
        signal.add(i++, d); 
       } 
      } 
     })); 
     f.add(p, BorderLayout.SOUTH); 
     f.pack(); 
     f.setLocationRelativeTo(null); 
     f.setVisible(true); 
    } 

    private static class ReadFile { 

     private static final Random R = new Random(); 

     public static List<Double> readFile() { 
      List<Double> list = Stream.iterate(4.0, x -> x - (R.nextDouble()/42)) 
       .limit(42).collect(Collectors.toList()); 
      return list; 
     } 
    } 

    public static void main(String[] args) { 
     EventQueue.invokeLater(new Test()::display); 
    } 
} 

Answer 2

this.revalidate(); //is your solution. 

Он обновляет рамку после нажатия кнопки. Таким образом, отображение диаграммы по мере обновления фрейма.