Add setting for invert equals calls on null

Signed-off-by: Jessica He <jhe@redhat.com>

Author: JessicaJHee

document/_java.learnMoreAboutCleanUps.md

@@ -147,4 +147,28 @@ String x = """
 			System.out.println("abc");
 		}
 	}""";
+```
+
+### `invertEquals`
+
+Inverts calls to `Object.equals(Object)` and `String.equalsIgnoreCase(String)` to avoid useless null pointer exception.
+
+The caller must be nullable and the parameter must not be nullable.
+
+By avoiding null pointer exceptions, the behavior may change.
+
+For example:
+
+```java
+String message = getMessage();
+boolean result1 = message.equals("text");
+boolean result2 = message.equalsIgnoreCase("text");
+```
+
+becomes:
+
+```java
+String message = getMessage();
+boolean result1 = "text".equals(message);
+boolean result2 = "text".equalsIgnoreCase(message);
 ```

package.json

@@ -1008,7 +1008,8 @@
               "qualifyStaticMembers",
               "addOverride",
               "addDeprecated",
-              "stringConcatToTextBlock"
+              "stringConcatToTextBlock",
+              "invertEquals"
             ]
           },
           "default": [],