#795 adding a no-arg beginControlFlow() overload in addition to fixing the behavior for the empty string case.

src/main/java/com/squareup/javapoet/CodeBlock.java

@@ -370,6 +370,12 @@ public Builder beginControlFlow(String controlFlow, Object... args) {
       return this;
     }
 
+    public Builder beginControlFlow(Object... args) {
+      add("{\n", args);
+      indent();
+      return this;
+    }
+
     /**
      * @param controlFlow the control flow construct and its code, such as "else if (foo == 10)".
      *     Shouldn't contain braces or newline characters.

src/main/java/com/squareup/javapoet/MethodSpec.java

@@ -474,6 +474,12 @@ public Builder beginControlFlow(String controlFlow, Object... args) {
       return this;
     }
 
+    public Builder beginControlFlow(Object... args) {
+      code.beginControlFlow(args);
+      return this;
+
+    }
+
     /**
      * @param codeBlock the control flow construct and its code, such as "if (foo == 5)".
      * Shouldn't contain braces or newline characters.

src/test/java/com/squareup/javapoet/MethodSpecTest.java

@@ -462,6 +462,57 @@ abstract static class AbstractClassWithPrivateAnnotation {
         + "}\n");
   }
 
+  @Test public void controlBlockTestWithEmptyBeginBlock_1(){
+    MethodSpec methodSpec = MethodSpec.methodBuilder("method")
+            .beginControlFlow()
+            .addStatement("int year = 2022")
+            .endControlFlow()
+            .beginControlFlow()
+            .addStatement("int month = 4")
+            .endControlFlow()
+            .beginControlFlow()
+            .addStatement("int day = 22")
+            .endControlFlow()
+            .build();
+
+    assertThat(methodSpec.toString()).isEqualTo("" +
+            "void method() {\n" +
+            "  {\n" +
+            "    int year = 2022;\n" +
+            "  }\n" +
+            "  {\n" +
+            "    int month = 4;\n" +
+            "  }\n" +
+            "  {\n" +
+            "    int day = 22;\n" +
+            "  }\n" +
+            "}\n");
+  }
+
+  @Test public void controlBlockTestWithEmptyBeginBlock_2(){
+    Map<String, Object> m = new HashMap<>();
+    m.put("field", "valueField");
+    m.put("threshold", "5");
+
+    MethodSpec methodSpec = MethodSpec.methodBuilder("method")
+            .beginControlFlow(named("if ($field:N > $threshold:L)", m))
+            .nextControlFlow(named("else if ($field:N == $threshold:L)", m))
+            .endControlFlow()
+            .beginControlFlow()
+            .endControlFlow()
+            .build();
+
+    assertThat(methodSpec.toString()).isEqualTo(""
+            + "void method() {\n"
+            + "  if (valueField > 5) {\n"
+            + "  } else if (valueField == 5) {\n"
+            + "  }\n"
+            + "  {\n"
+            + "  }\n"
+            + "}\n");
+
+  }
+
   @Test public void doWhileWithNamedCodeBlocks() {
     Map<String, Object> m = new HashMap<>();
     m.put("field", "valueField");