add nio questions

data/2.Java中阶/5.NIO/2.Buffer（缓冲器）/BufferRead.json

+{
+    "type": "code_options",
+    "author": "clong",
+    "source": "BufferRead.md",
+    "exercise_id": "",
+    "notebook_enable": true
+}
\ No newline at end of file

data/2.Java中阶/5.NIO/2.Buffer（缓冲器）/BufferRead.md

+# Buffer Read
+
+
+以下关于 `Buffer` 的使用，正确的是：
+
+
+## 答案
+
+```java
+import java.nio.DoubleBuffer;
+
+public class BufferTest {
+    public static void main(String[] args) {
+        DoubleBuffer doubleBuffer = DoubleBuffer.allocate(10);
+        doubleBuffer.put(12.0);
+        doubleBuffer.put(25.0);
+        doubleBuffer.flip();
+        System.out.println(doubleBuffer.get());
+        System.out.println(doubleBuffer.get());
+        doubleBuffer.clear();
+    }
+}
+```
+
+## 选项
+
+### A
+
+```java
+import java.nio.CharBuffer;
+
+public class BufferTest {
+    public static void main(String[] args) {
+        CharBuffer charBuffer = CharBuffer.allocate(1);
+        charBuffer.put("test");
+        charBuffer.flip();
+        System.err.println(charBuffer.get());
+    }
+}
+```
+
+### B
+
+```java
+
+import java.nio.IntBuffer;
+
+public class BufferTest {
+    public static void main(String[] args) {
+        IntBuffer intBuffer = IntBuffer.allocate(1);
+        intBuffer.put(25);
+        intBuffer.put(12);
+        intBuffer.flip();
+        System.err.println(intBuffer.get());
+        System.err.println(intBuffer.get());
+    }
+}
+```
+
+### C
+
+```java
+import java.nio.ByteBuffer;
+
+public class BufferTest {
+    public static void main(String[] args) {
+        ByteBuffer byteBuffer = ByteBuffer.allocate(10);
+        byte a = 12;
+        byteBuffer.put(a);
+        System.err.println(byteBuffer.get());
+    }
+}
+```

data/2.Java中阶/5.NIO/2.Buffer（缓冲器）/BufferType.json

+{
+    "type": "code_options",
+    "author": "clong",
+    "source": "BufferType.md",
+    "exercise_id": "",
+    "notebook_enable": true
+}
\ No newline at end of file

data/2.Java中阶/5.NIO/2.Buffer（缓冲器）/BufferType.md

+# Buffer Type
+
+
+以下不属于Java NIO的 `Buffer` 类型的是：
+
+
+## 答案
+
+```
+StringBuffer
+```
+
+## 选项
+
+### A
+
+```
+ByteBuffer
+```
+
+### B
+
+```
+CharBuffer
+```
+
+### C
+
+```
+DoubleBuffer
+```
+

data/2.Java中阶/5.NIO/2.Buffer（缓冲器）/config.json

@@ -2,6 +2,6 @@
   "node_id": "java-e622e94340ee4f00ae2aec33047cb19f",
   "keywords": [],
   "children": [],
-  "export": [],
+  "export": ["BufferType.json", "BufferRead.json"],
   "title": "Buffer（缓冲器）"
 }
\ No newline at end of file