databaseconnection.java

设计模式中的单件算法

package singleton;
 
public class DataBaseConnection {
	private boolean empty;
	private boolean boiled;
	private static DataBaseConnection uniqueInstance;
  
	private DataBaseConnection() {
		empty = true;
		boiled = false;
	}
  
	public static synchronized DataBaseConnection getInstance() {
		if (uniqueInstance == null) {
			System.out.println("Creating unique Database Connection Pool");
			uniqueInstance = new DataBaseConnection();
		}
		System.out.println("Returning Database Connection Pool");
		return uniqueInstance;
	}

}