Fix IDE warnings across xchart, xchart-demo, and xchart-site

xchart-demo/src/main/java/org/knowm/xchart/demo/ChartInfo.java

@@ -5,15 +5,15 @@
 public final class ChartInfo {
 
   private final String exampleChartName;
-  private final ExampleChart exampleChart;
+  private final ExampleChart<?> exampleChart;
 
   /**
    * Constructor
    *
    * @param exampleChartName
    * @param exampleChart
    */
-  public ChartInfo(String exampleChartName, ExampleChart exampleChart) {
+  public ChartInfo(String exampleChartName, ExampleChart<?> exampleChart) {
 
     this.exampleChartName = exampleChartName;
     this.exampleChart = exampleChart;
@@ -24,7 +24,7 @@ public String getExampleChartName() {
     return exampleChartName;
   }
 
-  public ExampleChart getExampleChart() {
+  public ExampleChart<?> getExampleChart() {
 
     return exampleChart;
   }

xchart-demo/src/main/java/org/knowm/xchart/demo/ChartStylePanel.java

@@ -78,22 +78,22 @@ public static final class EditableProperty {
     ChartStylePanel csp;
     Object additionalParameter;
 
-    static HashMap<Class, TableCellEditor> editorMap;
-    static Class[] assignableClasses = {
+    static HashMap<Class<?>, TableCellEditor> editorMap;
+    static Class<?>[] assignableClasses = {
       Theme.class, BasicStroke.class, Marker.class, TimeZone.class
     };
 
     static {
-      editorMap = new HashMap<Class, TableCellEditor>();
+      editorMap = new HashMap<>();
       {
-        JComboBox comboBox = new JComboBox(new Boolean[] {Boolean.TRUE, Boolean.FALSE});
+        JComboBox<Boolean> comboBox = new JComboBox<>(new Boolean[] {Boolean.TRUE, Boolean.FALSE});
         TableCellEditor cellEditor = new DefaultCellEditor(comboBox);
         editorMap.put(Boolean.class, cellEditor);
         editorMap.put(Boolean.TYPE, cellEditor);
       }
 
       {
-        Class[][] clsArr = {
+        Class<?>[][] clsArr = {
           {int.class, Integer.class},
           {byte.class, Byte.class},
           {short.class, Short.class},
@@ -103,17 +103,17 @@ public static final class EditableProperty {
           {String.class, String.class}
         };
 
-        for (Class[] classes : clsArr) {
+        for (Class<?>[] classes : clsArr) {
           GenericEditorWithClass editor = new GenericEditorWithClass(classes[1]);
-          for (Class class1 : classes) {
+          for (Class<?> class1 : classes) {
             editorMap.put(class1, editor);
           }
         }
       }
 
       {
-        JComboBox comboBox =
-            new JComboBox(new Theme[] {new XChartTheme(), new GGPlot2Theme(), new MatlabTheme()});
+        JComboBox<Theme> comboBox =
+            new JComboBox<>(new Theme[] {new XChartTheme(), new GGPlot2Theme(), new MatlabTheme()});
         editorMap.put(Theme.class, new DefaultCellEditor(comboBox));
       }
 
@@ -125,7 +125,7 @@ public static final class EditableProperty {
           new LabelValue("DASH_DASH", SeriesLines.DASH_DASH),
           new LabelValue("DASH_DOT", SeriesLines.DASH_DOT)
         };
-        JComboBox comboBox = new JComboBox(values);
+        JComboBox<LabelValue> comboBox = new JComboBox<>(values);
         editorMap.put(BasicStroke.class, new DefaultCellEditor(comboBox));
       }
       {
@@ -156,13 +156,13 @@ public static final class EditableProperty {
           new LabelValue("GGPlot2 Tick Marks", new BasicStroke(1.5f)), //
           new LabelValue("Matlab Tick Marks", new BasicStroke(.5f)), //
         };
-        JComboBox comboBox = new JComboBox(values);
+        JComboBox<LabelValue> comboBox = new JComboBox<>(values);
         editorMap.put(Stroke.class, new DefaultCellEditor(comboBox));
       }
 
       {
         Marker[] seriesMarkers = new BaseSeriesMarkers().getSeriesMarkers();
-        JComboBox comboBox = new JComboBox(seriesMarkers);
+        JComboBox<Marker> comboBox = new JComboBox<>(seriesMarkers);
         editorMap.put(Marker.class, new DefaultCellEditor(comboBox));
       }
 
@@ -178,7 +178,7 @@ public static final class EditableProperty {
               Locale.GERMAN,
               Locale.forLanguageTag("tr-TR")
             };
-        JComboBox comboBox = new JComboBox(values);
+        JComboBox<Locale> comboBox = new JComboBox<>(values);
         editorMap.put(Locale.class, new DefaultCellEditor(comboBox));
       }
 
@@ -188,7 +188,7 @@ public static final class EditableProperty {
         for (int i = 0; i < values.length; i++) {
           values[i] = TimeZone.getTimeZone(availableIDs[i]);
         }
-        JComboBox comboBox = new JComboBox(values);
+        JComboBox<TimeZone> comboBox = new JComboBox<>(values);
         editorMap.put(TimeZone.class, new DefaultCellEditor(comboBox));
       }
     }
@@ -220,19 +220,19 @@ private void initEditor() {
 
       try {
         Object val = getValue();
-        Class cls = val == null ? getValueClass() : val.getClass();
+        Class<?> cls = val == null ? getValueClass() : val.getClass();
         cellEditor = editorMap.get(cls);
         if (cellEditor != null) {
           return;
         }
 
         if (cls.isEnum()) {
-          JComboBox comboBox = new JComboBox(cls.getEnumConstants());
+          JComboBox<Object> comboBox = new JComboBox<>(cls.getEnumConstants());
           cellEditor = new DefaultCellEditor(comboBox);
           return;
         }
 
-        for (Class class1 : assignableClasses) {
+        for (Class<?> class1 : assignableClasses) {
           if (class1.isAssignableFrom(cls)) {
             cellEditor = editorMap.get(class1);
             return;
@@ -316,7 +316,7 @@ public TableCellEditor getTableCellEditor() {
       return cellEditor;
     }
 
-    public Class getValueClass() {
+    public Class<?> getValueClass() {
 
       if (readMethod == null) {
         // obj is array
@@ -354,11 +354,11 @@ public Component getTableCellEditorComponent(
 
   static class GenericEditorWithClass extends DefaultCellEditor {
 
-    Class[] argTypes = new Class[] {String.class};
-    java.lang.reflect.Constructor constructor;
+    Class<?>[] argTypes = new Class<?>[] {String.class};
+    java.lang.reflect.Constructor<?> constructor;
     Object value;
 
-    public GenericEditorWithClass(Class cls) {
+    public GenericEditorWithClass(Class<?> cls) {
       super(new JTextField());
       getComponent().setName("Table.editor");
       try {
@@ -409,19 +409,19 @@ public Object getCellEditorValue() {
 
   public static class EditorTableModel extends DefaultTableModel {
     ArrayList<EditableProperty> properties;
-    Chart chart;
+    Chart<?, ?> chart;
     int rowCount;
     ChartStylePanel csp;
 
-    public EditorTableModel(ChartStylePanel csp, Chart chart) {
+    public EditorTableModel(ChartStylePanel csp, Chart<?, ?> chart) {
       this.csp = csp;
       addColumn("Name");
       addColumn("Type");
       addColumn("Value");
       changeChart(chart);
     }
 
-    public void changeChart(Chart chart) {
+    public void changeChart(Chart<?, ?> chart) {
 
       this.chart = chart;
       properties = getProperties(csp, chart);
@@ -487,7 +487,7 @@ public int getRowCount() {
   public static class EditorTable extends JTable {
     EditorTableModel tableModel;
 
-    public EditorTable(ChartStylePanel csp, Chart chart) {
+    public EditorTable(ChartStylePanel csp, Chart<?, ?> chart) {
       tableModel = new EditorTableModel(csp, chart);
 
       setModel(tableModel);
@@ -503,7 +503,7 @@ public EditorTable(ChartStylePanel csp, Chart chart) {
       setAutoCreateRowSorter(true);
     }
 
-    public void changeChart(Chart chart) {
+    public void changeChart(Chart<?, ?> chart) {
 
       tableModel.changeChart(chart);
     }
@@ -517,7 +517,7 @@ public TableCellEditor getCellEditor(int row, int column) {
       if (editor != null) {
         return editor;
       }
-      Class valueClass = se.getValueClass();
+      Class<?> valueClass = se.getValueClass();
       TableCellEditor defaultEditor = getDefaultEditor(valueClass);
 
       // System.out.println(valueClass + "=>" + defaultEditor);
@@ -526,9 +526,9 @@ public TableCellEditor getCellEditor(int row, int column) {
   }
 
   private EditorTable table;
-  private XChartPanel chartPanel;
+  private XChartPanel<?> chartPanel;
 
-  public ChartStylePanel(XChartPanel chartPanel) {
+  public ChartStylePanel(XChartPanel<?> chartPanel) {
     this.chartPanel = chartPanel;
     table = new EditorTable(this, chartPanel.getChart());
     JScrollPane scrollpane = new JScrollPane(table);
@@ -538,7 +538,7 @@ public ChartStylePanel(XChartPanel chartPanel) {
     setPreferredSize(new Dimension(800, 600));
   }
 
-  public void changeChart(XChartPanel chartPanel) {
+  public void changeChart(XChartPanel<?> chartPanel) {
 
     this.chartPanel = chartPanel;
     table.changeChart(chartPanel.getChart());
@@ -575,7 +575,7 @@ protected void repaintChart() {
               "YAxisAlignment",
               "YAxisGroupPosition"));
 
-  public static ArrayList<EditableProperty> getProperties(ChartStylePanel csp, Chart chart) {
+  public static ArrayList<EditableProperty> getProperties(ChartStylePanel csp, Chart<?, ?> chart) {
 
     if (chart == null) {
       return new ArrayList<EditableProperty>();
@@ -585,10 +585,10 @@ public static ArrayList<EditableProperty> getProperties(ChartStylePanel csp, Cha
         getObjectProperties(csp, chart.getStyler(), "styler.", skipSet);
     list.addAll(list2);
 
-    Map<String, Series> seriesMap = chart.getSeriesMap();
+    Map<String, ? extends Series> seriesMap = chart.getSeriesMap();
     int ind = 0;
     TreeSet<Integer> seriesIndSet = new TreeSet<Integer>();
-    for (Entry<String, Series> e : seriesMap.entrySet()) {
+    for (Entry<String, ? extends Series> e : seriesMap.entrySet()) {
       Series series = e.getValue();
       list2 = getObjectProperties(csp, series, "series[" + e.getKey() + "].", skipSet);
       list.addAll(list2);

xchart-demo/src/main/java/org/knowm/xchart/demo/XChartDemo.java

@@ -33,7 +33,7 @@ public class XChartDemo extends JPanel implements TreeSelectionListener {
   private final JTree tree;
 
   /** The panel for chart */
-  protected XChartPanel chartPanel;
+  protected XChartPanel<?> chartPanel;
 
   Timer timer = new Timer();
 
@@ -57,7 +57,7 @@ public XChartDemo() {
     JScrollPane treeView = new JScrollPane(tree);
 
     // Create Chart Panel
-    chartPanel = new XChartPanel(new AreaChart01().getChart());
+    chartPanel = new XChartPanel<>(new AreaChart01().getChart());
 
     // Add the scroll panes to a split pane.
     splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
@@ -86,9 +86,8 @@ public void valueChanged(TreeSelectionEvent e) {
     if (node.isLeaf()) {
       ChartInfo chartInfo = (ChartInfo) nodeInfo;
       // displayURL(chartInfo.bookURL);
-      ExampleChart exampleChart = chartInfo.getExampleChart();
-      chartPanel = new XChartPanel(exampleChart.getChart());
-      exampleChart.customizePanel(chartPanel);
+      ExampleChart<?> exampleChart = chartInfo.getExampleChart();
+      updateChartPanel(exampleChart);
       splitPane.setBottomComponent(chartPanel);
 
       // start running a simulated data feed for the sample real-time plot
@@ -113,6 +112,16 @@ public void run() {
     }
   }
 
+  private void updateChartPanel(ExampleChart<?> exampleChart) {
+    doUpdateChartPanel(exampleChart);
+  }
+
+  private <C extends Chart<?, ?>> void doUpdateChartPanel(ExampleChart<C> exampleChart) {
+    XChartPanel<C> panel = new XChartPanel<>(exampleChart.getChart());
+    exampleChart.customizePanel(panel);
+    chartPanel = panel;
+  }
+
   /**
    * Create the tree
    *
@@ -127,7 +136,7 @@ private void createNodes(DefaultMutableTreeNode top) {
 
     List<ExampleChart<Chart<Styler, Series>>> exampleList = DemoChartsUtil.getAllDemoCharts();
     String categoryName = "";
-    for (ExampleChart exampleChart : exampleList) {
+    for (ExampleChart<Chart<Styler, Series>> exampleChart : exampleList) {
       String name = exampleChart.getClass().getSimpleName();
       name = name.substring(0, name.indexOf("Chart"));
       if (!categoryName.equals(name)) {

xchart-demo/src/main/java/org/knowm/xchart/demo/XChartStyleDemo.java

@@ -21,7 +21,7 @@ public XChartStyleDemo() {
 
   @Override
   public void valueChanged(TreeSelectionEvent e) {
-    XChartPanel oldChartPanel = chartPanel;
+    XChartPanel<?> oldChartPanel = chartPanel;
     super.valueChanged(e);
     if (chartPanel != oldChartPanel) {
       stylePanel.changeChart(chartPanel);

xchart-demo/src/main/java/org/knowm/xchart/demo/charts/bar/BarChart07.java

@@ -10,7 +10,6 @@
 import org.knowm.xchart.ToolTipType;
 import org.knowm.xchart.XChartPanel;
 import org.knowm.xchart.demo.charts.ExampleChart;
-import org.knowm.xchart.style.Styler;
 import org.knowm.xchart.style.Styler.LegendPosition;
 
 /**

xchart-demo/src/main/java/org/knowm/xchart/demo/charts/bar/BarChart11.java

@@ -5,7 +5,6 @@
 import java.util.Random;
 import org.knowm.xchart.CategoryChart;
 import org.knowm.xchart.CategoryChartBuilder;
-import org.knowm.xchart.CategorySeries;
 import org.knowm.xchart.SwingWrapper;
 import org.knowm.xchart.demo.charts.ExampleChart;
 
@@ -72,10 +71,8 @@ public CategoryChart getChart() {
     chart.getStyler().setLabelsRotation(45);
 
     // Series
-    CategorySeries series1 =
-        chart.addSeries("series1", getLinearValues(0, 200, 6), getRandomValues(10, 50, 6));
-    CategorySeries series2 =
-        chart.addSeries("series2", getLinearValues(0, 200, 6), getRandomValues(10, 50, 6));
+    chart.addSeries("series1", getLinearValues(0, 200, 6), getRandomValues(10, 50, 6));
+    chart.addSeries("series2", getLinearValues(0, 200, 6), getRandomValues(10, 50, 6));
 
     return chart;
   }

xchart-demo/src/main/java/org/knowm/xchart/demo/charts/bar/BarChart12.java

@@ -85,9 +85,9 @@ public CategoryChart getChart() {
     }
 
     // Series
-    CategorySeries staked1 = chart.addSeries("Period 1", months, period1Values);
-    CategorySeries staked2 = chart.addSeries("Period 2", months, period2Values);
-    CategorySeries staked3 = chart.addSeries("Period 3", months, period3Values);
+    chart.addSeries("Period 1", months, period1Values);
+    chart.addSeries("Period 2", months, period2Values);
+    chart.addSeries("Period 3", months, period3Values);
     CategorySeries overlappedLine = chart.addSeries("Average", months, averageValues);
     overlappedLine.setOverlapped(true);
     overlappedLine.setChartCategorySeriesRenderStyle(CategorySeries.CategorySeriesRenderStyle.Line);

xchart-demo/src/main/java/org/knowm/xchart/demo/charts/dial/DialChart02.java

@@ -5,7 +5,6 @@
 import java.awt.Font;
 import org.knowm.xchart.DialChart;
 import org.knowm.xchart.DialChartBuilder;
-import org.knowm.xchart.DialSeries;
 import org.knowm.xchart.SwingWrapper;
 import org.knowm.xchart.XChartPanel;
 import org.knowm.xchart.demo.charts.ExampleChart;
@@ -46,7 +45,7 @@ public DialChart getChart() {
             .build();
 
     // Series
-    DialSeries series = chart.addSeries("Rate", 0.55, "55 %");
+    chart.addSeries("Rate", 0.55, "55 %");
 
     chart.getStyler().setLegendVisible(true);
     chart.getStyler().setArcAngle(330);

xchart-demo/src/main/java/org/knowm/xchart/demo/charts/line/LineChart08.java

@@ -62,7 +62,7 @@ public XYChart getChart() {
     // chart.getStyler().setXAxisLabelRotation(0);
 
     // Series
-    XYSeries series = chart.addSeries("10^x", xData, yData);
+    chart.addSeries("10^x", xData, yData);
 
     return chart;
   }