我用Netbeans创建了一个JFrame，并在其中放入了两个JPanels（mainPanel和secondPanel）。
当我使用JFrame的菜单栏打开文件时，该项目的另一类返回一个JPanel。
如何更新mainPanel，以便显示从项目的其他类返回的JPanel？
谢谢。
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package nysemarketpick;
import java.io.File;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
/**
*
* @author skiabox
*/
public class MainForm extends JFrame {
/**
* Creates new form MainForm
*/
public MainForm() {
initComponents();
}
/**
* 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() {
fileChooser = new javax.swing.JFileChooser();
toolbar = new javax.swing.JToolBar();
shortButton = new javax.swing.JButton();
jSeparator1 = new javax.swing.JToolBar.Separator();
midButton = new javax.swing.JButton();
jSeparator2 = new javax.swing.JToolBar.Separator();
longButton = new javax.swing.JButton();
mainPanel = new javax.swing.JPanel();
secondPanel = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
jMenuBar1 = new javax.swing.JMenuBar();
fileMenu = new javax.swing.JMenu();
Open = new javax.swing.JMenuItem();
Exit = new javax.swing.JMenuItem();
optionsMenu = new javax.swing.JMenu();
shortItem = new javax.swing.JMenuItem();
midItem = new javax.swing.JMenuItem();
longItem = new javax.swing.JMenuItem();
toolsMenu = new javax.swing.JMenu();
helpMenu = new javax.swing.JMenu();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("Nyse Stock Pick");
toolbar.setFloatable(false);
toolbar.setRollover(true);
shortButton.setIcon(new javax.swing.ImageIcon(getClass().getResource("/nysemarketpick/S-orange-icon.png"))); // NOI18N
shortButton.setText("Short-Term");
shortButton.setFocusable(false);
shortButton.setHorizontalTextPosition(javax.swing.SwingConstants.RIGHT);
shortButton.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
toolbar.add(shortButton);
toolbar.add(jSeparator1);
midButton.setIcon(new javax.swing.ImageIcon(getClass().getResource("/nysemarketpick/M-lg-icon.png"))); // NOI18N
midButton.setText("Mid-Term");
midButton.setFocusable(false);
midButton.setHorizontalTextPosition(javax.swing.SwingConstants.RIGHT);
midButton.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
toolbar.add(midButton);
toolbar.add(jSeparator2);
longButton.setIcon(new javax.swing.ImageIcon(getClass().getResource("/nysemarketpick/L-blue-icon.png"))); // NOI18N
longButton.setText("Long-Term");
longButton.setFocusable(false);
longButton.setHorizontalTextPosition(javax.swing.SwingConstants.RIGHT);
longButton.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
toolbar.add(longButton);
org.jdesktop.layout.GroupLayout mainPanelLayout = new org.jdesktop.layout.GroupLayout(mainPanel);
mainPanel.setLayout(mainPanelLayout);
mainPanelLayout.setHorizontalGroup(
mainPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(0, 0, Short.MAX_VALUE)
);
mainPanelLayout.setVerticalGroup(
mainPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(0, 537, Short.MAX_VALUE)
);
org.jdesktop.layout.GroupLayout secondPanelLayout = new org.jdesktop.layout.GroupLayout(secondPanel);
secondPanel.setLayout(secondPanelLayout);
secondPanelLayout.setHorizontalGroup(
secondPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(0, 240, Short.MAX_VALUE)
);
secondPanelLayout.setVerticalGroup(
secondPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(0, 543, Short.MAX_VALUE)
);
jLabel1.setText("World Market Status");
jLabel1.setHorizontalTextPosition(javax.swing.SwingConstants.RIGHT);
fileMenu.setText("File");
Open.setText("Open");
Open.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
OpenActionPerformed(evt);
}
});
fileMenu.add(Open);
Exit.setText(" Exit");
Exit.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
ExitActionPerformed(evt);
}
});
fileMenu.add(Exit);
jMenuBar1.add(fileMenu);
optionsMenu.setText("Options");
shortItem.setText("Short-Term Moving Average");
optionsMenu.add(shortItem);
midItem.setText("Mid-Term Moving Average");
optionsMenu.add(midItem);
longItem.setText("Long-Term Moving Average");
optionsMenu.add(longItem);
jMenuBar1.add(optionsMenu);
toolsMenu.setText("Tools");
jMenuBar1.add(toolsMenu);
helpMenu.setText("Help");
jMenuBar1.add(helpMenu);
setJMenuBar(jMenuBar1);
org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.addContainerGap()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.add(toolbar, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 762, Short.MAX_VALUE)
.add(jLabel1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 182, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(354, 354, 354))
.add(layout.createSequentialGroup()
.add(6, 6, 6)
.add(mainPanel, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.add(18, 18, 18)
.add(secondPanel, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(351, 351, 351))))
);
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.addContainerGap()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING, false)
.add(toolbar, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 25, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(jLabel1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.add(12, 12, 12)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(mainPanel, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(secondPanel, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
.addContainerGap(33, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void ExitActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
System.exit(0);
}
private void OpenActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
int returnVal = fileChooser.showOpenDialog(this);
if (returnVal == JFileChooser.APPROVE_OPTION)
{
File file = fileChooser.getSelectedFile();
//What to do with the file
//remove current chart
mainPanel.removeAll();
//add new chart
PriceVolumeChart chart = new PriceVolumeChart(file.getAbsolutePath());
mainPanel.add(chart.getChart());
mainPanel.validate();
}
}
/**
* @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(MainForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(MainForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(MainForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(MainForm.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 MainForm().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JMenuItem Exit;
private javax.swing.JMenuItem Open;
private javax.swing.JFileChooser fileChooser;
private javax.swing.JMenu fileMenu;
private javax.swing.JMenu helpMenu;
private javax.swing.JLabel jLabel1;
private javax.swing.JMenuBar jMenuBar1;
private javax.swing.JToolBar.Separator jSeparator1;
private javax.swing.JToolBar.Separator jSeparator2;
private javax.swing.JButton longButton;
private javax.swing.JMenuItem longItem;
private javax.swing.JPanel mainPanel;
private javax.swing.JButton midButton;
private javax.swing.JMenuItem midItem;
private javax.swing.JMenu optionsMenu;
private javax.swing.JPanel secondPanel;
private javax.swing.JButton shortButton;
private javax.swing.JMenuItem shortItem;
private javax.swing.JToolBar toolbar;
private javax.swing.JMenu toolsMenu;
// End of variables declaration
}
public class PriceVolumeChart
{
static FileReader fileReader;
static File file;
static TimeSeries t1 = new TimeSeries("49-day moving average");
static String filename;
JPanel myPanel;
/**
* Default constructor
*/
public PriceVolumeChart(String absoluteFilePath)
{
//super(title);
filename = absoluteFilePath;
//JPanel panel = createDemoPanel();
//panel.setPreferredSize(new Dimension(500, 270));
//setContentPane(panel);
myPanel = createDemoPanel();
myPanel.setPreferredSize(new Dimension(500, 270));
}
//create price dataset
//hard-coded here
private static OHLCDataset createPriceDataset(String filename)
{
//the following data is taken from http://finance.yahoo.com/
//for demo purposes...
OHLCSeries s1 = new OHLCSeries(filename);
try {
BufferedReader in = new BufferedReader(new FileReader(filename));
DateFormat df = new SimpleDateFormat("yyyyMMdd");
String inputLine;
in.readLine();
while ((inputLine = in.readLine()) != null) {
StringTokenizer st = new StringTokenizer(inputLine, ",");
Date date = df.parse( st.nextToken() );
double open = Double.parseDouble( st.nextToken() );
double high = Double.parseDouble( st.nextToken() );
double low = Double.parseDouble( st.nextToken() );
double close = Double.parseDouble( st.nextToken() );
double volume = Double.parseDouble( st.nextToken() );
//double adjClose = Double.parseDouble( st.nextToken() );
s1.add(new Day(date), open, high, low, close);
t1.add(new Day(date), close);
}
in.close();
}
catch (Exception e) {
e.printStackTrace();
}
OHLCSeriesCollection dataset = new OHLCSeriesCollection();
dataset.addSeries(s1);
return dataset;
}
//create volume dataset
private static IntervalXYDataset createVolumeDataset(String filename)
{
//create dataset 2...
TimeSeries s1 = new TimeSeries("Volume");
try {
BufferedReader in = new BufferedReader(new FileReader(filename));
DateFormat df = new SimpleDateFormat("yyyyMMdd");
String inputLine;
in.readLine();
while ((inputLine = in.readLine()) != null) {
StringTokenizer st = new StringTokenizer(inputLine, ",");
Date date = df.parse( st.nextToken() );
st.nextToken();
st.nextToken();
st.nextToken();
st.nextToken();
double volume = Double.parseDouble( st.nextToken() );
//double adjClose = Double.parseDouble( st.nextToken() );
s1.add(new Day(date), volume);
}
in.close();
}
catch (Exception e) {
e.printStackTrace();
}
return new TimeSeriesCollection(s1);
}
private static JFreeChart createCombinedChart()
{
OHLCDataset data1 = createPriceDataset(filename);
XYItemRenderer renderer1 = new HighLowRenderer();
renderer1.setBaseToolTipGenerator(new StandardXYToolTipGenerator(StandardXYToolTipGenerator.DEFAULT_TOOL_TIP_FORMAT, new SimpleDateFormat("d-MMM-yyyy"), new DecimalFormat("0.00")));
renderer1.setSeriesPaint(0, Color.blue);
DateAxis domainAxis = new DateAxis("Date");
NumberAxis rangeAxis = new NumberAxis("Price");
rangeAxis.setNumberFormatOverride(new DecimalFormat("$0.00"));
rangeAxis.setAutoRange(true);
rangeAxis.setAutoRangeIncludesZero(false);
XYPlot plot1 = new XYPlot(data1, domainAxis, rangeAxis, renderer1);
plot1.setBackgroundPaint(Color.lightGray);
plot1.setDomainGridlinePaint(Color.white);
plot1.setRangeGridlinePaint(Color.white);
plot1.setRangePannable(true);
//Overlay the Long-Term Trend Indicator
TimeSeries dataset3 = MovingAverage.createMovingAverage(t1, "LT", 49, 49);
TimeSeriesCollection collection = new TimeSeriesCollection();
collection.addSeries(dataset3);
plot1.setDataset(1, collection);
plot1.setRenderer(1, new StandardXYItemRenderer());
//add a second dataset (volume) and renderer
IntervalXYDataset data2 = createVolumeDataset(filename);
XYBarRenderer renderer2 = new XYBarRenderer();
renderer2.setDrawBarOutline(false);
renderer2.setBaseToolTipGenerator(new StandardXYToolTipGenerator(StandardXYToolTipGenerator.DEFAULT_TOOL_TIP_FORMAT, new SimpleDateFormat("d-MMM-yyyy"), new DecimalFormat("0,000.00")));
renderer2.setSeriesPaint(0, Color.red);
XYPlot plot2 = new XYPlot(data2, null, new NumberAxis("Volume"), renderer2);
plot2.setBackgroundPaint(Color.lightGray);
plot2.setDomainGridlinePaint(Color.white);
plot2.setRangeGridlinePaint(Color.white);
//middle pane oscillators
TimeSeries threeMA = MovingAverage.createMovingAverage(t1, "SL1", 3, 3);
TimeSeries tenMA = MovingAverage.createMovingAverage(t1, "SL2", 10, 10);
List<TimeSeriesDataItem> threeItemsList = new ArrayList<TimeSeriesDataItem>();
List<TimeSeriesDataItem> tenItemsList = new ArrayList<TimeSeriesDataItem>();
threeItemsList = threeMA.getItems();
tenItemsList = tenMA.getItems();
for (TimeSeriesDataItem item: threeItemsList)
{
System.out.println("three" + item.getValue().doubleValue() + " " + item.getPeriod().toString());
}
for (TimeSeriesDataItem item: tenItemsList)
{
System.out.println("ten" + item.getValue().doubleValue() + " " + item.getPeriod().toString());
}
TimeSeries slDataset = new TimeSeries("SL");
int i = 0;
//List<TimeSeriesDataItem> slItemsList = new ArrayList<TimeSeriesDataItem>();
TimeSeriesDataItem myItem;
Day threeDate;
for (TimeSeriesDataItem item: threeItemsList)
{
//RegularTimePeriod variable = item.getPeriod();
if (item.getPeriod().compareTo(tenItemsList.get(0).getPeriod()) < 0)
{
continue;
}
else
{
double result = item.getValue().doubleValue() - tenItemsList.get(i).getValue().doubleValue();
Day currentDay = (Day)item.getPeriod();
myItem = new TimeSeriesDataItem(currentDay, result);
slDataset.add(myItem);
//slItemsList.add(myItem);
i++;
}
}
System.out.println("slDataset count : " + slDataset.getItemCount());
TimeSeriesCollection collectionSL = new TimeSeriesCollection();
collectionSL.addSeries(slDataset);
//create middle line (ML)
XYLineAndShapeRenderer rendererFinal = new XYLineAndShapeRenderer(true, false);
rendererFinal.setBaseShapesVisible(false);
TimeSeries ml = MovingAverage.createMovingAverage(slDataset, "ML", 16, 16);
TimeSeriesCollection collectionML = new TimeSeriesCollection();
collectionML.addSeries(ml);
DateAxis domainMiddleAxis = new DateAxis();
NumberAxis rangeMiddleAxis = new NumberAxis("Value");
StandardXYItemRenderer rendererMiddle = new StandardXYItemRenderer();
rendererMiddle.setBaseShapesVisible(false);
//rendererMiddle.setBaseToolTipGenerator(new StandardXYToolTipGenerator(StandardXYToolTipGenerator.DEFAULT_TOOL_TIP_FORMAT, new SimpleDateFormat("d-MMM-yyyy"), new DecimalFormat("0.00")));
XYPlot plot3 = new XYPlot(collectionSL, domainMiddleAxis, rangeMiddleAxis, rendererFinal);
plot3.setBackgroundPaint(Color.lightGray);
plot3.setDomainGridlinePaint(Color.white);
plot3.setRangeGridlinePaint(Color.white);
plot3.setRangePannable(true);
plot3.setDomainPannable(true);
//plot3.setDataset(collectionSL);
//plot3.setRenderer(new StandardXYItemRenderer());
//StandardXYItemRenderer rendererML = new StandardXYItemRenderer();
plot3.setDataset(1, collectionML);
plot3.setRenderer(1, rendererMiddle);
//XYLineAndShapeRenderer r = new XYLineAndShapeRenderer();
//r.setBaseShapesVisible(false);
//plot3.setRenderer(1, r);
CombinedDomainXYPlot cplot = new CombinedDomainXYPlot(domainAxis);
cplot.add(plot1, 3);
cplot.add(plot3, 2);
cplot.add(plot2, 2);
cplot.setGap(8.0);
cplot.setDomainGridlinePaint(Color.white);
cplot.setDomainGridlinesVisible(true);
cplot.setDomainPannable(true);
//return the new combined chart
JFreeChart chart = new JFreeChart("Sun Microsystems (SUNW)", JFreeChart.DEFAULT_TITLE_FONT, cplot, true);
ChartUtilities.applyCurrentTheme(chart);
renderer2.setShadowVisible(false);
renderer2.setBarPainter(new StandardXYBarPainter());
return chart;
}
//create a panel
public static JPanel createDemoPanel()
{
JFreeChart chart = createCombinedChart();
ChartPanel panel = new ChartPanel(chart);
panel.setMouseWheelEnabled(true);
return panel;
}
//return chart
public JPanel getChart()
{
return myPanel;
}
}
最佳答案
似乎您想使用mainPanel作为包含图表的面板。而不是将面板分配给mainPanel，请尝试在其中添加和删除面板。使其成为容器，不要尝试通过将另一个Jpanel分配给变量来更改它。
在方法“ private void OpenActionPerformed（java.awt.event.ActionEvent evt）”中尝试更改以下内容：
//What to do with the file
PriceVolumeChart chart = new PriceVolumeChart(file.getAbsolutePath());
mainPanel = chart.getChart();
至：
//remove current chart
mainPanel.removeAll(); //assuming you have nothing else in main panel other than a chart panel;
//add new chart
PriceVolumeChart chart = new PriceVolumeChart(file.getAbsolutePath());
mainPanel.add(chart);
mainPanel.validate();
注意注意：我本人并没有自己。这个想法来自这里：Change a JPanel dynamically based on JRadioButton
我将其修改为我认为适合您的代码的位置。
我只是使用与原始问题相同的代码，因此也许您也应该尝试答案中建议的内容，因为它看起来像是正确的方法。
编辑：
在您对代码进行更改之后，正如您所评论的，还添加以下内容：
在功能上
public MainForm() {
initComponents();
}
组件初始化后，请替换主面板的布局管理器。例如：
public MainForm() {
initComponents();
mainPanel.setLayout(new FlowLayout());
}