Java - JVM: 垃圾收集器

1. Finalize

如果某个对象实现了finalize() 方法，那么在垃圾回收器回收这个对象的时候，必须调用该对象被覆盖的finalize()方法.

public class testAny {
	@Test
	public void testGCFinalize() throws InterruptedException{
		call();
		System.gc(); 
	}
	
	private void call(){
		GCFinalize f = new GCFinalize();
		f.sayHello();
	}
	
	class GCFinalize{
		
		void sayHello(){
			System.out.println("hello~~");
		}
		
		@Override
		protected void finalize(){
			System.out.println("My last moment~~~");
		}
		
	}

输出结果:

hello~~
My last moment~~~  ( invoked by Finalize() )