diff --git a/dseki/paiza/src/C084.java b/dseki/paiza/src/C084.java
new file mode 100644
index 0000000000000000000000000000000000000000..ffe5bf46fa74e07436d92e17e3a2c8920326830f
--- /dev/null
+++ b/dseki/paiza/src/C084.java
@@ -0,0 +1,79 @@
+import java.util.Scanner;
+
+/**
+ * 枠で囲むクラス.
+ */
+public class C084 {
+  private static final int NUMBER_TO_ENCLOSE_TEXT = 2; // 文字の左右を囲むための数
+  private static final char DECORATION_SYMBOL = '+'; // 文字を囲むための装飾文字
+  private static final String NEW_LINE = System.getProperty("line.separator"); // 改行のための文字列
+  private final String text; // 読み込む文字列
+  
+  C084(final String text) {
+    this.text = text;
+  }
+  
+  /**
+   * メインメソッド.
+   */
+  public static void main(final String[] args) {
+    final Scanner sc = new Scanner(System.in);
+    final String text = sc.nextLine();
+    final C084 c084 = new C084(text);
+    c084.outputDecorateText();
+    sc.close();
+  }
+  
+  /**
+   * 文字の周りを囲むメソッド.
+   */
+  String decorateText() {
+    String decoration = "";
+    decoration += decorateUpperAndLowerRowsOfText();
+    decoration += NEW_LINE;
+    decoration += decorateMiddleRowOfText();
+    decoration += NEW_LINE;
+    decoration += decorateUpperAndLowerRowsOfText();
+    return decoration;
+  }
+  
+  /**
+   * 文字の周りを囲む出力メソッド.
+   */
+  public void outputDecorateText() {
+    System.out.println(decorateText());
+  }
+  
+  /**
+   * 文字の上下に囲いを作るメソッド.
+   *
+   * @return 囲みたい文字列の上下に出力する枠を返す
+   */
+  private String decorateUpperAndLowerRowsOfText() {
+    String decoration = "";
+    final int textLength = countNumberOfCharacters();
+    for (int i = 0; i < (textLength + NUMBER_TO_ENCLOSE_TEXT); i++) {
+      decoration += DECORATION_SYMBOL;
+    }
+    return decoration;
+  }
+  
+  /**
+   * 文字列の左右に囲いを作るメソッド.
+   *
+   * @return 左右を枠で囲んだ文字列を返す
+   */
+  private String decorateMiddleRowOfText() {
+    final String decoration = DECORATION_SYMBOL + this.text + DECORATION_SYMBOL;
+    return decoration;
+  }
+  
+  /**
+   * 文字列の数を返すメソッド.
+   *
+   * @return 文字列の数を返す
+   */
+  int countNumberOfCharacters() {
+    return this.text.length();
+  }
+}
\ No newline at end of file
diff --git a/dseki/paiza/test/C084Test.java b/dseki/paiza/test/C084Test.java
new file mode 100644
index 0000000000000000000000000000000000000000..80294b33b17fdc8278b49fe772482559296bca39
--- /dev/null
+++ b/dseki/paiza/test/C084Test.java
@@ -0,0 +1,49 @@
+import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.*;
+import org.junit.Test;
+
+public class C084Test {
+  private static final String NEW_LINE = System.getProperty("line.separator");
+  
+  @Test
+  public void countNumberOfCharactersで_paiza_の文字列の数5を取得する() throws Exception {
+    final C084 c084 = new C084("paiza");
+    assertThat(c084.countNumberOfCharacters(), is(5));
+  }
+
+  @Test
+  public void countNumberOfCharactersで文字列の数0を取得する() throws Exception {
+    final C084 c084 = new C084("");
+    assertThat(c084.countNumberOfCharacters(), is(0));
+  }
+
+  @Test
+  public void countNumberOfCharactersでHello_Worldの文字列の数12を取得する() throws Exception {
+    final C084 c084 = new C084("Hello World!");
+    assertThat(c084.countNumberOfCharacters(), is(12));
+  }  
+  
+  
+  @Test 
+  public void decorateTextでpaizaの周りを枠で囲む() throws Exception {
+    final C084 c084 = new C084("paiza");
+    assertThat(c084.decorateText(), is("+++++++" + NEW_LINE
+        + "+paiza+" + NEW_LINE + "+++++++"));
+  }
+  
+  @Test 
+  public void decorateTextで空文字の周りを枠で囲む() throws Exception {
+    final C084 c084 = new C084("");
+    assertThat(c084.decorateText(), is("++" + NEW_LINE
+        + "++" + NEW_LINE + "++"));
+  }
+  
+  @Test 
+  public void decorateTextでHello_Worldの周りを枠で囲む() throws Exception {
+    final C084 c084 = new C084("Hello World!");
+    assertThat(c084.decorateText(), is("++++++++++++++" + NEW_LINE
+        + "+Hello World!+" + NEW_LINE + "++++++++++++++"));
+  }
+
+}
+