ʮһ javaÃæÏò¶ÔÏó³ÌÐòÉè¼Æ(µ¥Ì¬Éè¼Æģʽ)
ʮһ javaÃæÏò¶ÔÏó³ÌÐòÉè¼Æ(µ¥Ì¬Éè¼Æģʽ)
/**
* ÃæÏò¶ÔÏóÖ®Áù
* µ¥Ì¬Ä£Ê½Éè¼Æ
* ËùνÀàµÄµ¥Ì¬Éè¼Æģʽ£¬¾ÍÊDzÉÈ¡Ò»¶¨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«Æ䶨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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=============================================
Hello.java
=============================================
package test;
public class Hello
{
static
{
try
{
//´Ë´¦¼´Îª±¾µØ·½·¨ËùÔÚÁ´½Ó¿âÃû
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1¡¢Ï ......
A flexible layout configurable with pattern string.
The goal of this class is to format
a LoggingEvent
and return the results as a String. The results depend on the conversion
pattern
.
The conversion pattern is closely related to the conversion pattern of the
printf function in C ......
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abstract classºÍinterfaceÊÇJavaÓïÑÔÖжÔÓÚ³éÏóÀඨÒå½øÐÐÖ§³ÖµÄÁ½ÖÖ»úÖÆ£¬ÕýÊÇÓÉÓÚÕâÁ½ÖÖ»úÖƵĴæÔÚ£¬²Å¸³ÓèÁËJavaÇ¿´óµÄÃæÏò¶ÔÏóÄÜÁ¦¡£abstract classºÍinterfaceÖ®¼äÔÚ¶ÔÓÚ³éÏóÀඨÒåµÄÖ§³Ö·½Ãæ¾ßÓкܴóµÄÏàËÆÐÔ£¬ÉõÖÁ¿ÉÒÔÏ໥Ìæ»»£¬Òò´ËºÜ¶à¿ª·¢ÕßÔÚ½øÐгéÏóÀඨÒåʱ¶ÔÓÚabstract classºÍinterfaceµÄÑ¡ÔñÏԵñȽÏËæÒâ¡ ......