SingletonTest_2.java

public class SingletonTest_2 {
	
	
	static {
		System.out.println("SingletonTest_2 class load");
	}
	
	private static SingletonTest_2 instance= null;
	
	
	private SingletonTest_2(){
		System.out.println("SingletonTest_2 class new instance");
	}
	
	public static synchronized SingletonTest_2 getInstance(){
		
		if(instance == null) {
			instance = new SingletonTest_2();
		}
		
		return instance;
	}
}