java - 在 NetBeans GUI Builder 中调整 JPanel 表单的大小

Question

我在 Netbeans 中有一个 JPanel 表单，上面有 Jlists、JTextFields 和 JPanels。我想将 JFrame 分为四个(或六个或八个...)部分，并将此 JPanel 表单放入每个部分中。我想象了我想做的工作here 。

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)都不会改变它们的大小，并且只显示它的一部分。

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

我相信这段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(即只能添加一次)，并且将其多次添加到同一个容器中与删除它并再次添加它的效果相同

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);
}