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package org.sp.singleton;
//·½·¨Ò»
public class Singleton {
//½«×ÔÉíµÄʵÀý¶ÔÏóÉèÖÃΪһ¸öÊôÐÔ,²¢¼ÓÉÏStaticºÍfinalÐÞÊηû
private static final Singleton instance = new Singleton();
//½«¹¹Ôì·½·¨ÉèÖóÉ˽ÓÐÐÎʽ
private Singleton() {
}
//ͨ¹ýÒ»¸ö¾²Ì¬·½·¨ÏòÍâ½çÌṩÕâ¸öÀàµÄʵÀý
public static Singleton getInstance() {
return instance;
}
}
//·½·¨¶þ
class Singleton2 {
private static Singleton2 instance2 = null;
public static synchronized Singleton2 getInstance() {
if (instance2 == null)
instance2 = new Singleton2();
return instance2;
}
}
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public class Factory{
public ClassesDao getClassesDao(){
ClassesDao cd = new ClassesDaoImpl();
return cd;
}
}
interface ClassesDao{
public String getClassesName();
}
class ClassesDaoImpl implements ClassesDao {
public String getClassesName(){
System.out.println("A°à");
}
}
class test
{
public static void main(String[] args){
Factory f = new Factory();
f.getClassesDao().getClassesName();
}
}
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interface ClassesDao{
public String getClassesName();
}
class ClassesDaoImpl implements Classe
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*******************************************************************************************************
Filename: ftp.java
Author: leetsing(elove)
Create date: 2004-08-30
Use: connect to FTP server,then upload and download file
Modify date: 2004-09-05 add to upload file
2004-09-13 add to downl ......
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create or replace procedure batchUpdateCustomer(p_age in number) as
begin
update CUSTOMERS set AGE=AGE+1 where AGE>p_age;
end;
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tx = session.beginTransaction();
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