Angular js checkbox

I want to print the values of a array based on the checkbox associated with it. Find the code below

Javascript:

var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
    $scope.firstName= [{name:"John",selected:"false"},{name:"Anil",selected:"false"},{name:"Kumar",selected:"false"}];
    $scope.lastName= "Doe";
    $scope.name1=[],
    $scope.addname=function(){
    angular.forEach($scope.firstName, function(name,selected){
  if(selected=="true") {
  alert(name);
    $scope.name1.push(name)
  }
});
 }
 });

html:

<div ng-app="myApp" ng-controller="myCtrl">
<table >

<tr ng-repeat="first in firstName">
<td><input type="Checkbox" ng-model="first.selected"></td>

</tr>
<tr><td><input type="Button" ng-click="addname()" value="Submit" ng-model="lastName"></td></tr>

<tr ng-repeat="nam in name1"></tr>
</table>
</div>