单列模式

/**
 * 单列模式  饿汉模式
 * @author Administrator
 *
 */
public class SingleModel {

	private static SingleModel s;

	private SingleModel() {

	}
	public static synchronized SingleModel getInstace() {
		if (s == null)
			s = new SingleModel();
		return s;
	}
}

/**
 * 懒汉模式
 * @author Administrator
 *
 */
class single
{
	private static final single s = new single();
	single()
	{
	}
	public static single getInstance()
	{
		return s;
	}
}