java: automatically close the streams on error to please java

diff --git a/src/bindings/java/org/simgrid/NativeLib.java b/src/bindings/java/org/simgrid/NativeLib.java
index b00f324..a338cc3 100644 (file)
--- a/src/bindings/java/org/simgrid/NativeLib.java
+++ b/src/bindings/java/org/simgrid/NativeLib.java
@@ -12,6 +12,7 @@ import java.io.OutputStream;
 import java.io.File;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.util.stream.Stream;
 
 /** Helper class loading the native functions of SimGrid that we use for downcalls
  *
@@ -161,16 +162,15 @@ public final class NativeLib {
                }
                @Override
                public void run() {
-                       try {
-                                Files.walk(dir.toPath())
-                                     .sorted(java.util.Comparator.reverseOrder())
+                        try (Stream<Path> paths = Files.walk(dir.toPath())) {
+                                paths.sorted(java.util.Comparator.reverseOrder())
                                      .map(java.nio.file.Path::toFile)
                                      //.peek(System.out::println) // Prints what gets removed
                                      .forEach(java.io.File::delete);
                        } catch(Exception e) {
                                System.out.println("Error while cleaning temporary file "+dir.getAbsolutePath()+" during shutdown: "+e.getCause());
                                e.printStackTrace();
-                       }
+                        }
                }
        }
 }