groovy-parameter-types-error

file1.sh

[ERROR] C:\usr\SYNCH\PACKT\3166\Chapters_Code\ch05\target\generated-sources\groovy-stubs\main\com\baselogic\chapter05\utils\StringUtilities.java:26:0::0
Syntax error, parameterized types are only available if source level is 5.0
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException:
Failed to execute goal org.codehaus.mojo:aspectj-maven-plugin:1.3.1:compile (default) on project ch05:
Compiler errors: error at public static  java.lang.String getRequestQueryString(java.util.Map<java.lang.String, java.lang.String> parameters) { return (java.lang.String)null;}
                                                                                ^^^^^^^^^^^^
C:\usr\SYNCH\PACKT\3166\Chapters_Code\ch05\target\generated-sources\groovy-stubs\main\com\baselogic\chapter05\utils\StringUtilities.java:26:0::0
The type Map is not generic; it cannot be parameterized with arguments <String, String>
error at public static  java.lang.String getRequestQueryString(java.util.Map<java.lang.String, java.lang.String> parameters) { return (java.lang.String)null;}
                                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
C:\usr\SYNCH\PACKT\3166\Chapters_Code\ch05\target\generated-sources\groovy-stubs\main\com\baselogic\chapter05\utils\StringUtilities.java:26:0::0
Syntax error, parameterized types are only available if source level is 5.0
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:217)