在 NetBeans GUI Builder 中调整 JPanel 窗体的大小

Question

我在Netbeans中有一个JPanel Form，上面有Jlists，JTextFields和JPanells。我想将JFrame分成四个(或六个或八个...(部分，并将这个JPanel表单放入每个部分。我想象了我想在这里做的工作。

我尝试了BorderLayout，GridLayout和GridBagLayout。然而，在它们中的任何一个中，JPanel 和组件(Jlists、JTextFields 和 JPanels 上(都不会改变它们的大小，只显示它的一部分。

public class DynamicLineAndTimeSeriesChart extends ApplicationFrame implements ActionListener {
private TimeSeries series;
private double lastValue = 100.0;
private Timer timer = new Timer(10000, this);
GaugePanel panel; //*****That's the JPanel form I created by using NetBeans*****
//Note that GaugePanel extends javax.swing.JPanel
final ChartPanel chartPanel;//*****Since I need an xy-graph, I import jfree library
private Timer timer2 = new Timer(10000, this);
GaugePanel panel2;
final ChartPanel chartPanel2;
/**
 * Constructs a new dynamic chart application.
 *
 * @param title the frame title.
 */
public DynamicLineAndTimeSeriesChart(final String title) throws IOException {
    super(title);
    JFrame.setDefaultLookAndFeelDecorated(true);
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    setSize(screenSize.width, screenSize.height);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    this.series = new TimeSeries("Random Data", Millisecond.class);
    JPanel bigpanel=new JPanel();
    GridLayout experimentLayout = new GridLayout(2,2);
    bigpanel.setLayout(experimentLayout);
    final TimeSeriesCollection dataset = new TimeSeriesCollection(this.series);              
    final JFreeChart chart = createChart(dataset);
    timer.setInitialDelay(1000);
    chart.setBackgroundPaint(Color.LIGHT_GRAY);
    panel = new GaugePanel();
    panel.init();
    chartPanel = new ChartPanel(chart);
    panel.getjPanel1().add(chartPanel);
    chartPanel.setPreferredSize(new java.awt.Dimension(367, 336));
    bigpanel.add(panel);
    timer.start();
    panel.setVisible(true);
    chartPanel.setVisible(true);
    final TimeSeriesCollection dataset2 = new TimeSeriesCollection(this.series);              
    final JFreeChart chart2 = createChart(dataset2);
    timer2.setInitialDelay(1000);
    chart2.setBackgroundPaint(Color.LIGHT_GRAY);
    panel2 = new GaugePanel();
    panel2.init();
    chartPanel2 = new ChartPanel(chart2);
    panel2.getjPanel1().add(chartPanel2);
    chartPanel2.setPreferredSize(new java.awt.Dimension(367, 336));
    bigpanel.add(panel2);
    timer2.start();
    panel2.setVisible(true);
    chartPanel2.setVisible(true);
    setContentPane(bigpanel);
    repaint();
    setVisible(true);
}

Answer 1

我相信

这个代码片段将帮助您实现您想要实现的目标。了解一个组件只能有 1 个父组件(即仅添加一次(，并且将其多次添加到同一Container与删除它并再次添加相同

JFrame f = new JFrame("Test");
f.getContentPane().setLayout(new GridLayout(2,2));
Color[] colors = new Color [Color.RED, COLOR.GREEN, COLOR.BLUE, COLOR.BLACK];
for (int i = 0; i < 4; i++) {
  JPanel jp = new JPanel();
  jp.setBackground(colors[i];
  f.getContentPane().add(jp);
}