Java 我的JFrame没有显示刻度盘的输出
这是我的Java 我的JFrame没有显示刻度盘的输出,java,swing,jframe,jfreechart,Java,Swing,Jframe,Jfreechart,这是我的DialPlot课程: public class Demo { private DefaultValueDataset dataset = new DefaultValueDataset(0); private ChartPanel buildDialPlot(int minimumValue=0,int maximumValue,int majorTickGap) { DialPlot plot = new DialPlot(dataset);
DialPlot
课程:
public class Demo {
private DefaultValueDataset dataset = new DefaultValueDataset(0);
private ChartPanel buildDialPlot(int minimumValue=0,int maximumValue,int majorTickGap) {
DialPlot plot = new DialPlot(dataset);
plot.setDialFrame(new StandardDialFrame());
plot.addLayer(new DialValueIndicator(0));
plot.addLayer(new DialPointer.Pointer());
int redLine =maximumValue / 5 + 10;
plot.addLayer(new StandardDialRange(maximumValue, redLine, Color.blue));
plot.addLayer(new StandardDialRange(redLine, minimumValue, Color.red));
StandardDialScale scale = new StandardDialScale(minimumValue,
maximumValue, -120, -300, majorTickGap, majorTickGap - 1);
scale.setTickRadius(0.88);
scale.setTickLabelOffset(0.20);
scale.setTickLabelsVisible(false);
plot.addScale(0, scale);
return new ChartPanel(new JFreeChart(plot)) {
@Override
public Dimension getPreferredSize() {
return new Dimension(300, 300);
}
};
}
}
这是我的JFrame
GUI类
public class NewJFrame extends javax.swing.JFrame {
Demo d=new Demo();
int minimumValue=0;
int maximumValue=100;
int majorTickGap=1;
public NewJFrame() {
initComponents();
d.buildDialPlot(minimumValue,maximumValue,majorTickGap);
this.pack();
this.setLocationRelativeTo(null);
}
我还在JFrame
GUI类中添加了它,如下所示:
this.add(d.buildDialPlot(minimumValue,maximumValue,majorTickGap));
它显示相同的结果空JFrame
。
有人知道我犯了什么错吗
至少,您需要将
buildDialPlot()
返回的图表面板添加到JFrame
。给出了一个完整的示例
附录:使用建议的方法,下面的示例将您的Demo
添加到本地声明的JFrame
经测试:
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import javax.swing.JFrame;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.dial.DialPlot;
import org.jfree.chart.plot.dial.DialPointer;
import org.jfree.chart.plot.dial.DialValueIndicator;
import org.jfree.chart.plot.dial.StandardDialFrame;
import org.jfree.chart.plot.dial.StandardDialRange;
import org.jfree.chart.plot.dial.StandardDialScale;
import org.jfree.data.general.DefaultValueDataset;
/**
* @see https://stackoverflow.com/a/38906326/230513
*/
public class Test {
private void display() {
JFrame f = new JFrame("Test");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Demo d = new Demo();
ChartPanel cp = d.buildDialPlot(0, 100, 10);
f.add(cp);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
}
private static class Demo {
private DefaultValueDataset dataset = new DefaultValueDataset(0);
private ChartPanel buildDialPlot(int minimumValue, int maximumValue, int majorTickGap) {
DialPlot plot = new DialPlot(dataset);
plot.setDialFrame(new StandardDialFrame());
plot.addLayer(new DialValueIndicator(0));
plot.addLayer(new DialPointer.Pointer());
int redLine = maximumValue / 5 + 10;
plot.addLayer(new StandardDialRange(maximumValue, redLine, Color.blue));
plot.addLayer(new StandardDialRange(redLine, minimumValue, Color.red));
StandardDialScale scale = new StandardDialScale(minimumValue,
maximumValue, -120, -300, majorTickGap, majorTickGap - 1);
scale.setTickRadius(0.88);
scale.setTickLabelOffset(0.20);
scale.setTickLabelsVisible(false);
plot.addScale(0, scale);
return new ChartPanel(new JFreeChart(plot)) {
@Override
public Dimension getPreferredSize() {
return new Dimension(300, 300);
}
};
}
}
public static void main(String[] args) {
EventQueue.invokeLater(new Test()::display);
}
}
至少,您需要将buildDialPlot()
返回的ChartPanel
添加到JFrame
。给出了一个完整的示例
附录:使用建议的方法,下面的示例将您的Demo
添加到本地声明的JFrame
经测试:
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import javax.swing.JFrame;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.dial.DialPlot;
import org.jfree.chart.plot.dial.DialPointer;
import org.jfree.chart.plot.dial.DialValueIndicator;
import org.jfree.chart.plot.dial.StandardDialFrame;
import org.jfree.chart.plot.dial.StandardDialRange;
import org.jfree.chart.plot.dial.StandardDialScale;
import org.jfree.data.general.DefaultValueDataset;
/**
* @see https://stackoverflow.com/a/38906326/230513
*/
public class Test {
private void display() {
JFrame f = new JFrame("Test");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Demo d = new Demo();
ChartPanel cp = d.buildDialPlot(0, 100, 10);
f.add(cp);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
}
private static class Demo {
private DefaultValueDataset dataset = new DefaultValueDataset(0);
private ChartPanel buildDialPlot(int minimumValue, int maximumValue, int majorTickGap) {
DialPlot plot = new DialPlot(dataset);
plot.setDialFrame(new StandardDialFrame());
plot.addLayer(new DialValueIndicator(0));
plot.addLayer(new DialPointer.Pointer());
int redLine = maximumValue / 5 + 10;
plot.addLayer(new StandardDialRange(maximumValue, redLine, Color.blue));
plot.addLayer(new StandardDialRange(redLine, minimumValue, Color.red));
StandardDialScale scale = new StandardDialScale(minimumValue,
maximumValue, -120, -300, majorTickGap, majorTickGap - 1);
scale.setTickRadius(0.88);
scale.setTickLabelOffset(0.20);
scale.setTickLabelsVisible(false);
plot.addScale(0, scale);
return new ChartPanel(new JFreeChart(plot)) {
@Override
public Dimension getPreferredSize() {
return new Dimension(300, 300);
}
};
}
}
public static void main(String[] args) {
EventQueue.invokeLater(new Test()::display);
}
}
你能指导我怎么做吗?要获得更具体的指导,请编辑你的问题,包括一个显示你修改过的方法。它显示在本地框架中,但仍然根据你的方法,而不是gui框架。我必须在中添加更多的组件,但当我在框架维度d=Toolkit.getDefaultToolkit().getScreenSize()上应用以下代码时;f、 设置大小(d);拨号盘的大小根据帧大小自动增加,我不知道,我怀疑GUI编辑器正在妨碍您;我建议采用更具可扩展性的方法。非常感谢,我只需设置框架或面板的布局。再次感谢您的时间。您可以指导我如何做到这一点吗?有关更具体的指导,请编辑您的问题,使其包含一个显示您修改过的方法的列表。它显示在本地框架中,但仍根据您的方法而不是gui框架中。我必须在中添加更多的组件,但当我在框架维度d=Toolkit.getDefaultToolkit().getScreenSize()上应用以下代码时;f、 设置大小(d);拨号盘的大小根据帧大小自动增加,我不知道,我怀疑GUI编辑器正在妨碍您;我建议采用更具可扩展性的方法。非常感谢,我只需设置框架或面板的布局。再次感谢您的时间