src/demo/share/jfc/J2Ddemo/java2d/demos/Mix/Balls.java

@@ -69,11 +69,11 @@
         new Color(75, 00, 82), new Color(238, 130, 238) };
     private long now, deltaT, lasttime;
     private boolean active;
     protected Ball[] balls = new Ball[colors.length];
     protected boolean clearToggle;
-    protected JComboBox combo;
+    protected JComboBox<String> combo;
 
     public Balls() {
         setBackground(WHITE);
         for (int i = 0; i < colors.length; i++) {
             balls[i] = new Ball(colors[i], 30);

@@ -277,11 +277,11 @@
             addTool("Y", demo.balls[2].isSelected);
             addTool("G", demo.balls[3].isSelected);
             addTool("B", demo.balls[4].isSelected);
             addTool("I", demo.balls[5].isSelected);
             addTool("V", demo.balls[6].isSelected);
-            add(combo = new JComboBox());
+            add(combo = new JComboBox<>());
             combo.addItem("10");
             combo.addItem("20");
             combo.addItem("30");
             combo.addItem("40");
             combo.addItem("50");