探索 AutoCloseable接口

今天看代码看到了有使用AutoCloseable接口，很好奇它的实现方式，以及在一个try里使用多个的时候他们关闭的先后顺序是怎么样的。
写了个例子，然后反编出来看了下，原来是在编译时候自动加入了close的调用，调用的顺序是写再后面的先close

验证代码：

public class AutoCloseableDemo {    static class MyAutoCloseable1 implements AutoCloseable{        @Override        public void close() {            System.out.println("MyAutoCloseable1 close");        }        public void doSomething(){              System.out.println("MyAutoCloseable1 doSomething");        }    }    static class MyAutoCloseable2 implements AutoCloseable{        @Override        public void close() {            System.out.println("MyAutoCloseable2 close");        }        public void doSomething(){              System.out.println("MyAutoCloseable2 doSomething");        }    }    public static void main(String args[]) throws InterruptedException {        try(            MyAutoCloseable1 mc1 = new MyAutoCloseable1();            MyAutoCloseable2 mc2 = new MyAutoCloseable2();        ) {            mc1.doSomething();            mc2.doSomething();        }    }}

反编出来的代码如下：

Compiled from "AutoCloseableDemo.java"public class AutoCloseableDemo {  public AutoCloseableDemo();    Code:       0: aload_0       1: invokespecial #1                  // Method java/lang/Object."<init>":()V       4: return  public static void main(java.lang.String[]) throws java.lang.InterruptedException;    Code:       0: new           #2                  // class AutoCloseableDemo$MyAutoCloseable1       3: dup       4: invokespecial #3                  // Method AutoCloseableDemo$MyAutoCloseable1."<init>":()V       7: astore_1       8: aconst_null       9: astore_2      10: new           #4                  // class AutoCloseableDemo$MyAutoCloseable2      13: dup      14: invokespecial #5                  // Method AutoCloseableDemo$MyAutoCloseable2."<init>":()V      17: astore_3      18: aconst_null      19: astore        4      21: aload_1      22: invokevirtual #6                  // Method AutoCloseableDemo$MyAutoCloseable1.doSomething:()V      25: aload_3      26: invokevirtual #7                  // Method AutoCloseableDemo$MyAutoCloseable2.doSomething:()V      29: aload_3      30: ifnull        110      33: aload         4      35: ifnull        57      38: aload_3      39: invokevirtual #8                  // Method AutoCloseableDemo$MyAutoCloseable2.close:()V      42: goto          110      45: astore        5      47: aload         4      49: aload         5      51: invokevirtual #10                 // Method java/lang/Throwable.addSuppressed:(Ljava/lang/Throwable;)V      54: goto          110      57: aload_3      58: invokevirtual #8                  // Method AutoCloseableDemo$MyAutoCloseable2.close:()V      61: goto          110      64: astore        5      66: aload         5      68: astore        4      70: aload         5      72: athrow      73: astore        6      75: aload_3      76: ifnull        107      79: aload         4      81: ifnull        103      84: aload_3      85: invokevirtual #8                  // Method AutoCloseableDemo$MyAutoCloseable2.close:()V      88: goto          107      91: astore        7      93: aload         4      95: aload         7      97: invokevirtual #10                 // Method java/lang/Throwable.addSuppressed:(Ljava/lang/Throwable;)V     100: goto          107     103: aload_3     104: invokevirtual #8                  // Method AutoCloseableDemo$MyAutoCloseable2.close:()V     107: aload         6     109: athrow     110: aload_1     111: ifnull        181     114: aload_2     115: ifnull        134     118: aload_1     119: invokevirtual #11                 // Method AutoCloseableDemo$MyAutoCloseable1.close:()V     122: goto          181     125: astore_3     126: aload_2     127: aload_3     128: invokevirtual #10                 // Method java/lang/Throwable.addSuppressed:(Ljava/lang/Throwable;)V     131: goto          181     134: aload_1     135: invokevirtual #11                 // Method AutoCloseableDemo$MyAutoCloseable1.close:()V     138: goto          181     141: astore_3     142: aload_3     143: astore_2     144: aload_3     145: athrow     146: astore        8     148: aload_1     149: ifnull        178     152: aload_2     153: ifnull        174     156: aload_1     157: invokevirtual #11                 // Method AutoCloseableDemo$MyAutoCloseable1.close:()V     160: goto          178     163: astore        9     165: aload_2     166: aload         9     168: invokevirtual #10                 // Method java/lang/Throwable.addSuppressed:(Ljava/lang/Throwable;)V     171: goto          178     174: aload_1     175: invokevirtual #11                 // Method AutoCloseableDemo$MyAutoCloseable1.close:()V     178: aload         8     180: athrow     181: return    Exception table:       from    to  target type          38    42    45   Class java/lang/Throwable          21    29    64   Class java/lang/Throwable          21    29    73   any          84    88    91   Class java/lang/Throwable          64    75    73   any         118   122   125   Class java/lang/Throwable          10   110   141   Class java/lang/Throwable          10   110   146   any         156   160   163   Class java/lang/Throwable         141   148   146   any}