return null;\r
                        }\r
 \r
-                       processInstanceList.sort(new Comparator<HistoricProcessInstance>() {\r
-                               public int compare(HistoricProcessInstance m1, HistoricProcessInstance m2) {\r
-                                       return m1.getStartTime().compareTo(m2.getStartTime());\r
-                               }\r
-                       });\r
+                       processInstanceList.sort((m1, m2) -> m1.getStartTime().compareTo(m2.getStartTime()));\r
 \r
                        HistoricProcessInstance processInstance = processInstanceList.get(0);\r
 \r
                                return null;\r
                        }\r
 \r
-                       processInstanceList.sort(new Comparator<HistoricProcessInstance>() {\r
-                               public int compare(HistoricProcessInstance m1, HistoricProcessInstance m2) {\r
-                                       return m1.getStartTime().compareTo(m2.getStartTime());\r
-                               }\r
-                       });\r
+                       processInstanceList.sort((m1, m2) -> m1.getStartTime().compareTo(m2.getStartTime()));\r
 \r
                        HistoricProcessInstance processInstance = processInstanceList.get(subflowInstanceIndex);\r
 \r