普通的
public static synchronized ThreadScopeShareData getInstance(){
if (instance==null) {
instance = new ThreadScopeShareData();
}
return instance;
}
private static ThreadScopeShareData instance=null;
線程的
public static ThreadScopeShareData getInstance(){
ThreadScopeShareData instance= map.get();
if (instance==null) {
instance = new ThreadScopeShareData();
map.set(instance);
}
return instance;
}
private static ThreadLocal<ThreadScopeShareData> map =new ThreadLocal<ThreadScopeShareData>();
內(nèi)部類
public class StaticSingleton {
private StaticSingleton(){
System.out.println("StaticSingleton is create");
}
private static class SingletonHolder {
private static StaticSingleton instance = new StaticSingleton();
}
public static StaticSingleton getInstance() {
return SingletonHolder.instance;
}
}