iamond operator is not supported in -source 1.5

intellij运行flink出现下面的问题

Error:(56, 48) java: diamond operator is not supported in -source 1.5
  (use -source 7 or higher to enable diamond operator)

 

 

 下面是我的完整pom.xml文件,裏面紅色的是解決方案

   4.0.0

   com.xiao
   bbb
   1.0-SNAPSHOT

   
      
         
            org.apache.maven.plugins
            maven-compiler-plugin
            3.8.1
            
               1.8
               1.8
            
         
      
   


   
      
         org.apache.flink
         flink-java
         1.10.0
      
      
         org.apache.flink
         flink-streaming-java_2.12
         1.10.1
         
      
      
         org.apache.flink
         flink-clients_2.10
         1.2.0