单例模式测试种

public class SingletonTest {
	
	private int value;
	private static SingletonTest instance;。
	private SingletonTest(){
		System.out.println("正在执行构造器。。。");
	}
	public static SingletonTest getInstance(){
		if(instance==null){
			instance=new SingletonTest();
		}
		return instance;
	}
	public int getValue() {
		return value;
	}
	public void setValue(int value) {
		this.value = value;
	}
	
	public static void main(String[]args){
		SingletonTest t1=SingletonTest.getInstance();
		SingletonTest t2=SingletonTest.getInstance();
		t2.setValue(1);
		System.out.println(t1==t2);
	}
	
}