Attaching managed Policies

The following code will attach managed Policies to our role:

attachRolePolicy(roleName, policyARN);
........ 
public void attachRolePolicy(
         String roleName,
         String policyARN) {

     AttachRolePolicyRequest attachRolePolicyRequest =
             new AttachRolePolicyRequest()
                     .withRoleName(roleName)
                     .withPolicyArn(policyARN);

     AttachRolePolicyResult attachRolePolicyResult =
             amazonIdentityManagement.
                     attachRolePolicy(attachRolePolicyRequest);
 }