Code optimization

Author: yangfancoming

src/test/java/org/apache/ibatis/submitted/foreach_map/NestedBeanMapEntry.java

@@ -15,6 +15,8 @@
  */
 package org.apache.ibatis.submitted.foreach_map;
 
+import java.util.Objects;
+
 public class NestedBeanMapEntry {
   public NestedBeanMapEntry() {
   }
@@ -67,13 +69,13 @@ public boolean equals(Object o) {
 
     NestedBeanMapEntry map3Entry = (NestedBeanMapEntry) o;
 
-    if (keya != null ? !keya.equals(map3Entry.keya) : map3Entry.keya != null)
+    if (! Objects.equals(keya, map3Entry.keya))
       return false;
-    if (keyb != null ? !keyb.equals(map3Entry.keyb) : map3Entry.keyb != null)
+    if (! Objects.equals(keyb, map3Entry.keyb))
       return false;
-    if (valuea != null ? !valuea.equals(map3Entry.valuea) : map3Entry.valuea != null)
+    if (! Objects.equals(valuea, map3Entry.valuea))
       return false;
-    if (valueb != null ? !valueb.equals(map3Entry.valueb) : map3Entry.valueb != null)
+    if (! Objects.equals(valueb, map3Entry.valueb))
       return false;
 
     return true;