UIManager properties

import java.awt.Color;
  import java.awt.Font;
  import java.nio.charset.Charset;
  import java.text.DecimalFormat;
  import java.util.ArrayList;
  import java.util.Enumeration;
  import java.util.Iterator;
  import java.util.Properties;
  import javax.swing.Icon;
  import javax.swing.UIManager;
  import javax.swing.border.Border;

  public class PrintProperties {

     public static void main(String[] args) {
         PrintProperties printProperties = new PrintProperties();
     }

     public PrintProperties() {
         System.out.println("\n------------------printProperties Start------------------\n");

         // UIManager Keys
          Enumeration e = UIManager.getLookAndFeelDefaults().keys();
         ArrayList listFont = new ArrayList();
         ArrayList listIcon = new ArrayList();
         ArrayList listColor = new ArrayList();
         ArrayList listBorder = new ArrayList();
         ArrayList listElse = new ArrayList();

         while (e.hasMoreElements()) {
             Object key = e.nextElement();
             if (UIManager.get(key) instanceof Font) {
                 listFont.add(key);
             } else if (UIManager.get(key) instanceof Icon) {
                 listIcon.add(key);
             } else if (UIManager.get(key) instanceof Color) {
                 listColor.add(key);
             } else if (UIManager.get(key) instanceof Border) {
                 listBorder.add(key);
             } else {
                 listElse.add(key);
             }
         }

         System.out.println("\n\n-----------------------Font-----------------------\n");
         printArrayList(listFont);

         System.out.println("\n\n-----------------------Icon-----------------------\n");
         printArrayList(listIcon);

         System.out.println("\n\n-----------------------Color-----------------------\n");
         printArrayList(listColor);

         System.out.println("\n\n-----------------------Border-----------------------\n");
         printArrayList(listBorder);

         System.out.println("\n\n\n-----------------------Else-----------------------\n");
         printArrayList(listElse);

         // 系统属性
          System.out.println("\n\n\n\n\n\n\n\n\n系统属性");
         Properties property = System.getProperties();
         Enumeration keys = property.keys();
         int i = 0;
         DecimalFormat df = new DecimalFormat("Key0000");
         while (keys.hasMoreElements()) {
             i++;
             String key = (String) keys.nextElement();
             System.out.println(df.format(i) + ":" + key + " -> " + System.getProperty(key));
         }

         // 本机支持的全部编码集名字
          System.out.println("\n\n\n\n\n\n\n\n\n本机支持的全部编码集名字");
         Iterator iterator = Charset.availableCharsets().keySet().iterator();
         while (iterator.hasNext()) {
             System.out.println(iterator.next());
         }

         System.out.println("\n------------------printProperties End------------------\n");
     }

     private void printArrayList(ArrayList list) {
         if (list == null) {
             return;
         }
         for (int i = 0; i < list.size(); i++) {
             System.out.println(list.get(i));
         }
     }
}