iamond operator is not supported in -source 1.5

intellij運行flink出現下面的問題

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

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>

   <groupId>com.xiao</groupId>
   <artifactId>bbb</artifactId>
   <version>1.0-SNAPSHOT</version>

   <build>
      <plugins>
         <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.8.1</version>
            <configuration>
               <source>1.8</source>
               <target>1.8</target>
            </configuration>
         </plugin>
      </plugins>
   </build>


   <dependencies>
      <dependency>
         <groupId>org.apache.flink</groupId>
         <artifactId>flink-java</artifactId>
         <version>1.10.0</version>
      </dependency>
      <dependency>
         <groupId>org.apache.flink</groupId>
         <artifactId>flink-streaming-java_2.12</artifactId>
         <version>1.10.1</version>
         <!--            <scope>provided</scope>-->
      </dependency>
      <dependency>
         <groupId>org.apache.flink</groupId>
         <artifactId>flink-clients_2.10</artifactId>
         <version>1.2.0</version>
      </dependency>

   </dependencies>

</project>