fix(init-templates): update init templates for csharp and java (#5059)

Changed C#/Java parameter naming to match ts

Removed unnecessary null param in C#

Significant Java init template revision to create empty app with correct structure using templated naming instead of sample app with static naming

packages/aws-cdk/lib/init-templates/app/csharp/src/%name.PascalCased%/%name.PascalCased%Stack.template.cs

@@ -4,7 +4,7 @@ namespace %name.PascalCased%
 {
     public class %name.PascalCased%Stack : Stack
     {
-        public %name.PascalCased%Stack(Construct parent, string id, IStackProps props) : base(parent, id, props)
+        public %name.PascalCased%Stack(Construct scope, string id, IStackProps props) : base(scope, id, props)
         {
             // The code that defines your stack goes here
         }

packages/aws-cdk/lib/init-templates/app/csharp/src/%name.PascalCased%/Program.template.cs

@@ -9,7 +9,7 @@ class Program
     {
         static void Main(string[] args)
         {
-            var app = new App(null);
+            var app = new App();
             new %name.PascalCased%Stack(app, "%name.PascalCased%Stack", new StackProps());
             app.Synth();
         }

packages/aws-cdk/lib/init-templates/app/java/pom.template.xml

@@ -28,7 +28,7 @@
                 <artifactId>exec-maven-plugin</artifactId>
                 <version>1.6.0</version>
                 <configuration>
-                    <mainClass>com.myorg.HelloApp</mainClass>
+                    <mainClass>com.myorg.%name.PascalCased%App</mainClass>
                 </configuration>
             </plugin>
         </plugins>
@@ -42,33 +42,6 @@
             <version>%cdk-version%.DEVPREVIEW</version>
         </dependency>
 
-        <!-- Respective AWS Construct Libraries -->
-        <dependency>
-            <groupId>software.amazon.awscdk</groupId>
-            <artifactId>iam</artifactId>
-            <version>%cdk-version%.DEVPREVIEW</version>
-        </dependency>
-        <dependency>
-            <groupId>software.amazon.awscdk</groupId>
-            <artifactId>s3</artifactId>
-            <version>%cdk-version%.DEVPREVIEW</version>
-        </dependency>
-        <dependency>
-            <groupId>software.amazon.awscdk</groupId>
-            <artifactId>sns</artifactId>
-            <version>%cdk-version%.DEVPREVIEW</version>
-        </dependency>
-        <dependency>
-            <groupId>software.amazon.awscdk</groupId>
-            <artifactId>sns-subscriptions</artifactId>
-            <version>%cdk-version%.DEVPREVIEW</version>
-        </dependency>
-        <dependency>
-            <groupId>software.amazon.awscdk</groupId>
-            <artifactId>sqs</artifactId>
-            <version>%cdk-version%.DEVPREVIEW</version>
-        </dependency>
-
         <!-- https://mvnrepository.com/artifact/junit/junit -->
         <dependency>
             <groupId>junit</groupId>

packages/aws-cdk/lib/init-templates/app/java/src/main/java/com/myorg/HelloApp.java → packages/aws-cdk/lib/init-templates/app/java/src/main/java/com/myorg/%name.PascalCased%App.template.java

@@ -4,14 +4,12 @@
 
 import java.util.Arrays;
 
-public class HelloApp {
+public class %name.PascalCased%App {
     public static void main(final String argv[]) {
         App app = new App();
 
-        new HelloStack(app, "hello-cdk-1");
-        new HelloStack(app, "hello-cdk-2");
+        new %name.PascalCased%Stack(app, "%name.PascalCased%Stack");
 
-        // required until https://github.com/aws/jsii/issues/456 is resolved
         app.synth();
     }
 }

packages/aws-cdk/lib/init-templates/app/java/src/main/java/com/myorg/%name.PascalCased%Stack.template.java

@@ -0,0 +1,12 @@
+package com.myorg;
+
+import software.amazon.awscdk.core.Stack;
+import software.amazon.awscdk.core.Construct;
+
+public class %name.PascalCased%Stack extends Stack {
+    public %name.PascalCased%Stack(final Construct scope, final String id) {
+        super(scope, id, null);
+
+        // The code that defines your stack goes here
+    }
+}

packages/aws-cdk/lib/init-templates/app/java/src/test/java/com/myorg/HelloStackTest.java → packages/aws-cdk/lib/init-templates/app/java/src/test/java/com/myorg/%name.PascalCased%Test.template.java

@@ -8,21 +8,20 @@
 
 import java.io.IOException;
 
-import static junit.framework.TestCase.assertEquals;
+import static org.junit.Assert.assertEquals;
 
-public class HelloStackTest {
+public class %name.PascalCased%Test {
     private final static ObjectMapper JSON =
         new ObjectMapper().configure(SerializationFeature.INDENT_OUTPUT, true);
 
     @Test
     public void testStack() throws IOException {
         App app = new App();
-        HelloStack stack = new HelloStack(app, "test");
+        %name.PascalCased%Stack stack = new %name.PascalCased%Stack(app, "test");
 
         // synthesize the stack to a CloudFormation template and compare against
         // a checked-in JSON file.
         JsonNode actual = JSON.valueToTree(app.synth().getStackArtifact(stack.getArtifactId()).getTemplate());
-        JsonNode expected = JSON.readTree(getClass().getResource("expected.cfn.json"));
-        assertEquals(expected, actual);
+        assertEquals(new ObjectMapper().createObjectNode(), actual);
     }
 }