垃圾收集与对象生命拯救

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package x;

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 * @author Arthur
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y:]#g O\6nRiv0public class FinalizeEscapeGc {

^ @+_;}Zv0    private int count = 0;51Testing软件测试网6y@7DU&sCDH
    private static FinalizeEscapeGc fec = new FinalizeEscapeGc();51Testing软件测试网cB"I+_N c#P`~

    public FinalizeEscapeGc() {51Testing软件测试网,Zl@+CosL
    }51Testing软件测试网G;b{AA

    public static void main(String[] args) throws InterruptedException {

        //对象第一次成功拯救自己51Testing软件测试网?l%AEq#ciaC
        fec = null;
-e1M,X{#j5d-lPU0        System.gc();51Testing软件测试网/Wai1~#uPW:|u
        ////显然输出为null
uU,m0P [,_#G*Q0        System.out.println(fec);51Testing软件测试网`.t+`1oO3}E
        //因为finalize优先级很低，暂停一秒，以等待它51Testing软件测试网k0Mh7p,V
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        Thread.sleep(1000);51Testing软件测试网-d|9WP&t*T/n&qa
        //打印x.FinalizeEscapeGc@c17164，说明成功拯救
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b0x@?.C E|$]h4c~0        System.out.println(fec);51Testing软件测试网3xT/S
m+M
    
'bl[&\7jq"p0        51Testing软件测试网[+g*Wg+}/]\fO
        //第二次次拯救失败51Testing软件测试网M5xPrpR$Vr&W
        fec = null;
UW"Fsi0        //显然输出为null51Testing软件测试网Idm\Eg'CF R
        System.out.println(fec);51Testing软件测试网0s1?#J,\S'v6`I
      
$a G:d$B,ptn.@#k;`0        System.gc();
S#j.oP1fR0        //因为finalize优先级很低，暂停一秒，以等待它
4B;ku,ZN1K6Il0        Thread.sleep(1000);
TI5k&}3M+r0CX0        //输出为null51Testing软件测试网$p6y%w.i4K+L:BK"\A*m
        System.out.println(fec);
M5UU5}rIY0        51Testing软件测试网B7H-Go,\&E v*J"I

9Y:G|,IPu [ wXN0    }

    @Override51Testing软件测试网\,l'_"Oj7~AN*{!o
    public void finalize() throws Throwable {51Testing软件测试网&F-E0Mo`b
        super.finalize();
#XK\Z?y}dc0        System.out.println("执行finalize方法");
;IT+Mn4N!P}0fB&[0        fec = this;51Testing软件测试网2ov-N^\9|

    }

    public int getCount() {
Mp,L{"g!f%mG0        return count;51Testing软件测试网]6sza-x8Pq
    }
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