src/java.base/share/classes/java/lang/reflect/Method.java

@@ -418,21 +418,20 @@
         sb.append(getName());
     }
 
     @Override
     String toShortString() {
-        StringBuilder sb = new StringBuilder("method ");
-        sb.append(getDeclaringClass().getTypeName()).append('.');
-        sb.append(getName());
-        sb.append('(');
-        StringJoiner sj = new StringJoiner(",");
+        return "method " + getDeclaringClass().getTypeName() +
+                '.' + toShortSignature();
+    }
+
+    String toShortSignature() {
+        StringJoiner sj = new StringJoiner(",", getName() + "(", ")");
         for (Class<?> parameterType : getParameterTypes()) {
             sj.add(parameterType.getTypeName());
         }
-        sb.append(sj);
-        sb.append(')');
-        return sb.toString();
+        return sj.toString();
     }
 
     /**
      * Returns a string describing this {@code Method}, including type
      * parameters.  The string is formatted as the method access