public class A {
private int a;
public A(int a) {this.a= a;}
protected void finalize() {System.out.println("開始清理對象"+a);}
}
（1）public class Test1 {
public static void main(String[] args) {
{
A a = new A(1);
A aa = new A(11);
}
System.gc();
}
}
無輸出結(jié)果
================================================
（2）public class Test2 {
public static void main(String[] args) {
{
A a = new A(1);
A aa = new A(11);
}
{
A a = new A(2);
}
System.gc();
}
}
輸出結(jié)果：
開始清理對象1
===================================================
（3）public class Test3 {
public static void main(String[] args) {
{
A a =new A(1);
A aa =new A(11);
}
{
A a =new A(2);
A aa =new A(22);
}
System.gc();
}
}
輸出結(jié)果：
開始清理對象11
開始清理對象1
==================================================
（4）public class Test4 {
public static void main(String[] args) {
{
A a =new A(1);
A aa =new A(11);
}
{
A a =new A(2);
A aa =new A(22);
}
A a =new A(3);
System.gc();
}
}
輸出結(jié)果：
開始清理對象2
開始清理對象11
開始清理對象1
=================================================
（5）public class Test5 {
public static void main(String[] args) {
{
A a =new A(1);
A aa =new A(11);
}
{
A a =new A(2);
A aa =new A(22);
}
A a =new A(3);
A aa =new A(33);
System.gc();
}
}
輸出結(jié)果：
開始清理對象22
開始清理對象2
開始清理對象11
開始清理對象1
