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ʮһ javaÃæÏò¶ÔÏó³ÌÐòÉè¼Æ(µ¥Ì¬Éè¼ÆÄ£Ê½)
/**
 * ÃæÏò¶ÔÏóÖ®Áù
 * µ¥Ì¬Ä£Ê½Éè¼Æ
 * ËùνÀàµÄµ¥Ì¬Éè¼ÆÄ£Ê½£¬¾ÍÊDzÉȡһ¶¨µÄ·½·¨±£Ö¤ÔÚÕû¸öµÄÈí¼þϵͳÖУ¬¶Ôij¸öÀàÖ»ÄÜ´æÔÚÒ»¸ö¶ÔÏóʵÀý£¬
 * ²¢ÇÒ¸ÃÀàÖ»Ìṩһ¸öÈ¡µÃÆä¶ÔÏóʵÀýµÄ·½·¨¡£
 */
class Single
{
 private static int count = 0;
 
 private Single()//Ê×ÏȽ«¹¹Ôì»ú¶¨Òå³É˽ÓеÄ.
 {
  System.out.println("contructor is calling...");
  System.out.println("we creat " + (++count) + " object");
 }
 
 private static Single single = new Single();
 //ÔÚ¸ÃÀàÄÚ²¿²úÉúÒ»¸ö¶ÔÏó,²¢½«Æä¶¨ÒåΪstatic,ÕâÑù¾ÍÖ»ÓÐÒ»¸ö¶ÔÏóÁË.
 
 public static Single getSingle()
 //Ìṩһ¸ö¾²Ì¬·½·¨(ÒòΪ¶ÔÏóµÄÒýÓÃʱstaticµÄËùÒÔÒª¶¨Òå³É¾²Ì¬·½·¨),·µ»ØÕâΨһµÄ¶ÔÏó.
 {
  return single;
 }
}
public class SingleTest {
 public static void main(String[] args)
 {
  Single.getSingle();
  Single.getSingle();
  Single.getSingle();
  Single.getSingle();
  Single.getSingle();
 }
}
/* ouput
contructor is calling...
we creat 1 object
 */


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¾Å javaÃæÏò¶ÔÏó³ÌÐòÉè¼Æ(this¹Ø¼ü×Ö)

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/**
 * ÃæÏò¶ÔÏóÖ®ËÄ
 * this¹Ø¼ü×Ö×ܽá
 */
/*this¹Ø¼ü×ֵĵÚÒ»ÖÖÓ÷¨*/
//ÔÚ·½·¨Öе÷ÓÃͬÀàÖеķ½·¨,ÕâʱµÄthis¿ÉÒÔÊ¡ÂÔ.
class ThisPointer
{
 public void function1()
 {
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