AutoCloseableの実行順序

CloseableTest.java

public class CloseableTest implements AutoCloseable {

    public static void main(String[] args) {

        try (CloseableTest test = new CloseableTest()) {
            test.throwException();;
        } catch (Exception e) {
            System.out.println("catch exception");
            System.out.println(e.getSuppressed()[0]); //close()メソッドの中で投げられた例外にcatch句でアクセスができる。
        }

    }

    CloseableTest() {
        System.out.println("new CloseableTest");
    }

    void throwException() throws Exception {
        System.out.println("throwException()");
        throw new Exception();
    }

    @Override
    public void close() throws Exception {
        System.out.println("close()");
        throw new Exception("surpressed");
    }
}

stdout

new CloseableTest
throwException()
close()
catch exception
java.lang.Exception: surpressed

デコンパイル結果(上と同等なソースコードかつtry-with-resourcesを使わない場合)

import java.io.PrintStream;

public class CloseableTest
  implements AutoCloseable
{
  public static void main(String[] args)
  {
    try
    {
      CloseableTest test = new CloseableTest();Throwable localThrowable3 = null;
      try
      {
        test.throwException();
      }
      catch (Throwable localThrowable1)
      {
        localThrowable3 = localThrowable1;throw localThrowable1;
      }
      finally
      {
        if (test != null) {
          if (localThrowable3 != null) {
            try
            {
              test.close();
            }
            catch (Throwable localThrowable2)
            {
              localThrowable3.addSuppressed(localThrowable2);
            }
          } else {
            test.close();
          }
        }
      }
    }
    catch (Exception e)
    {
      System.out.println("catch exception");
      System.out.println(e.getSuppressed()[0]);
    }
  }
  
  CloseableTest()
  {
    System.out.println("new CloseableTest");
  }
  
  void throwException()
    throws Exception
  {
    System.out.println("throwException()");
    throw new Exception();
  }
  
  public void close()
    throws Exception
  {
    System.out.println("close()");
    throw new Exception("surpressed");
  }
}