Java Try With Resources - 关闭资源的顺序

Question

在运行下面的代码

class MyResource1 implements AutoCloseable {
    public void close() throws IOException {
        System.out.print("1 ");
    }
}

class MyResource2 implements Closeable {
    public void close() throws IOException {
        throw new IOException();
    }
}

public class MapAndFlatMap {
    public static void main(String[] args) {
        try (
                MyResource1 r1 = new MyResource1();
                MyResource2 r2 = new MyResource2();
            ) {
            System.out.print("T ");
        } catch (IOException ioe) {
            System.out.print("IOE ");
        } finally {
            System.out.print("F ");
        }
    }
}

我得到以下输出

T IOE 1 F

但我期待

T 1 IOE F

即使在 try 中更改了资源的顺序，如下所示

MyResource2 r2 = new MyResource2();
    MyResource1 r1 = new MyResource1();

输出没有变化。据我所知，资源将在声明的相反方向关闭。正确吗？

Answer 1

这是记录在案的行为：“close methods of resources are called in the opposite order of their creation”

Java Try With Resources - 关闭资源的顺序

Java Try With Resources - Order of Closing Resources

java

try-with-resources