StringBufferTest

src/main/java/com/zeekling/string/StringBufferTest.java

@@ -0,0 +1,26 @@
+package com.zeekling.string;
+
+/**
+ * @author zeekling
+ * @apiNote https://www.nowcoder.com/question/next?pid=30796423&qid=15076&tid=44509101
+ * @since 2021-05-23
+ */
+public class StringBufferTest {
+
+
+    public static void main(String[] args) {
+
+        StringBuffer a = new StringBuffer("A");
+
+        StringBuffer b = new StringBuffer("B");
+
+        operate(a, b);
+
+        System.out.println(a + "." + b);
+    }
+
+    static void operate(StringBuffer x, StringBuffer y) {
+        x.append(y);
+        y = x;
+    }
+}