ImageLoader: Use try-with-resource

Doesn't try to fix anything. Just code and warnings reduced.

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/graphics/ImageLoader.java

@@ -176,18 +176,10 @@ public ImageData[] load(InputStream stream) {
  */
 public ImageData[] load(String filename) {
 	if (filename == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
-	InputStream stream = null;
-	try {
-		stream = new FileInputStream(filename);
+	try (InputStream stream = new FileInputStream(filename)) {
 		return load(stream);
 	} catch (IOException e) {
 		SWT.error(SWT.ERROR_IO, e);
-	} finally {
-		try {
-			if (stream != null) stream.close();
-		} catch (IOException e) {
-			// Ignore error
-		}
 	}
 	return null;
 }

examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet319.java

@@ -186,31 +186,20 @@ protected boolean validate(Object object) {
 /* shared methods for converting instances of MyType <-> byte[] */
 
 static byte[] convertToByteArray(MyType type) {
-	DataOutputStream dataOutStream = null;
-	try {
-		ByteArrayOutputStream byteOutStream = new ByteArrayOutputStream();
-		dataOutStream = new DataOutputStream(byteOutStream);
+	try (ByteArrayOutputStream byteOutStream = new ByteArrayOutputStream();
+		DataOutputStream dataOutStream = new DataOutputStream(byteOutStream)) {
 		byte[] bytes = type.name.getBytes();
 		dataOutStream.writeInt(bytes.length);
 		dataOutStream.write(bytes);
 		dataOutStream.writeLong(type.time);
 		return byteOutStream.toByteArray();
 	} catch (IOException e) {
 		return null;
-	} finally {
-		if (dataOutStream != null) {
-			try {
-				dataOutStream.close();
-			} catch (IOException e) {}
-		}
 	}
 }
 
 static MyType restoreFromByteArray(byte[] bytes) {
-	DataInputStream dataInStream = null;
-	try {
-		ByteArrayInputStream byteInStream = new ByteArrayInputStream(bytes);
-		dataInStream = new DataInputStream(byteInStream);
+	try (DataInputStream dataInStream = new DataInputStream(new ByteArrayInputStream(bytes))) {
 		int size = dataInStream.readInt();
 		byte[] name = new byte[size];
 		dataInStream.read(name);
@@ -220,12 +209,6 @@ static MyType restoreFromByteArray(byte[] bytes) {
 		return result;
 	} catch (IOException ex) {
 		return null;
-	} finally {
-		if (dataInStream != null) {
-			try {
-				dataInStream.close();
-			} catch (IOException e) {}
-		}
 	}
 }