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Properties props=System.getProperties(); //ϵͳÊôÐÔ  
   System.out.println("JavaµÄÔËÐл·¾³°æ±¾£º"+props.getProperty("java.version"));  
   System.out.println("JavaµÄÔËÐл·¾³¹©Ó¦ÉÌ£º"+props.getProperty("java.vendor"));  
   System.out.println("Java¹©Ó¦É̵ÄURL£º"+props.getProperty("java.vendor.url"));  
   System.out.println("JavaµÄ°²×°Â·¾¶£º"+props.getProperty("java.home"));  
   System.out.println("JavaµÄÐéÄâ»ú¹æ·¶°æ±¾£º"+props.getProperty("java.vm.specification.version"));  
   System.out.println("JavaµÄÐéÄâ»ú¹æ·¶¹©Ó¦ÉÌ£º"+props.getProperty("java.vm.specification.vendor"));  
   System.out.println("JavaµÄÐéÄâ»ú¹æ·¶Ãû³Æ£º"+props.getProperty("java.vm.specification.name"));  
   System.out.println("JavaµÄÐéÄâ»úʵÏÖ°æ±¾£º"+props.getProperty("java.vm.version"));  
   System.out.println("JavaµÄÐéÄâ»úʵÏÖ¹©Ó¦ÉÌ£º"+props.getProperty("java.vm.vendor"));  
   System.out.println("JavaµÄÐéÄâ»úʵÏÖÃû³Æ£º"+props.getProperty("java.vm.name"));  
   System.out.println("JavaÔËÐÐʱ»·¾³¹æ·¶°æ±¾£º"+props.getProperty("java.specification.version"));  
   System.out.println("JavaÔËÐÐʱ»·¾³¹æ·¶¹©Ó¦ÉÌ£º"+props.getProperty("java.specification.vender"));  
   System.out.println("JavaÔËÐÐʱ»·¾³¹æ·¶Ãû³Æ£º"+props.getProperty("java.specification.name"));  
   System.out.println("JavaµÄÀà¸ñʽ°æ±¾ºÅ£º"+props.getProperty("java.class.version"));  
   System.out.println("JavaµÄÀà·¾¶£º"+props.getProperty("java.class.path"));  
   System.out.println("¼ÓÔØ¿âʱËÑË÷µÄ·¾¶ÁÐ±í£º"+props.getProperty("java.library.path"));  
   System.out.println("ĬÈϵÄÁÙʱÎļþ·¾¶£º"+props.getProperty("java.io.tmpdir"));  
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java RSS ʵÏÖ£¨ÁÐ×Ó£©

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Java IO Á÷ÕûÀí

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java Adapterģʽ


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java Adapterģʽ
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ͨ³££¬¿Í»§Àࣨclients of class£©Í¨¹ýÀàµÄ½Ó¿Ú·ÃÎÊËüÌṩµÄ·þÎñ¡£ÓÐʱ£¬ÏÖÓеÄÀࣨexisting class£©¿ÉÒÔÌṩ¿Í»§ÀàµÄ¹¦ÄÜÐèÒª£¬µ«ÊÇËüËùÌṩµÄ½Ó¿Ú²»Ò»¶¨ÊÇ¿Í»§ÀàËùÆÚÍûµÄ¡£ÕâÊÇÓÉÓÚÏÖÓеĽӿÚÌ«Ïêϸ»òÕßȱ·¦ ......

Java Calendar »ñÈ¡±¾ÖÜÖÜÒ»ºÍÖÜÈÕ´úÂë

/**
  * µÃµ½±¾ÖÜÖÜÒ»
  *
  * @return yyyy-MM-dd
  */
 public static String getMondayOfThisWeek() {
  Calendar c = Calendar.getInstance();
  int day_of_week = c.get(Calendar.DAY_OF_WEEK) - 1;
  if (day_of_week == 0)
   da ......
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