test java gc

/** MyObject.java */

public class MyObject {

    static int count;

    MyObject() {

        ++count;

    }

    public static void main(String[] args) {

        MyObject obj1 = new MyObject();

        MyObject obj2 = new MyObject();

        MyObject obj3 = new MyObject();

        System.out.println("目前有" +count+ "個物件");

        obj2 = null;

        System.out.println("請求G.C.");

        System.gc();

        System.out.println("目前剩餘" +count+ "個物件");

    }

    protected void finalize() throws Throwable {

        --count;

        String tName = Thread.currentThread().getName();

        System.out.println("執行finalize()的是:" + tName);

    }

}

輸出結果:
目前有3個物件
請求G.C.
目前剩餘3個物件
執行finalize()的是:Finalizer