no more tasks

ChatApp/app/build.gradle

@@ -39,47 +39,24 @@ javafx {
 
 application {
     // Define the main class for the application.
-    mainClass = 'client.ClientGui'
+    if (project.hasProperty('admin')) {
+        mainClass = 'ChatApp'
+    } else if (project.hasProperty('server')) {
+        mainClass = 'ChatAppServer'
+    }else if (project.hasProperty('client')) {
+        mainClass = 'ChatAppClient'
+    }else if (project.hasProperty('serverGui')) {
+        mainClass = 'server.ServerGUI'
+    } else {
+        mainClass = 'client.ClientGui'
+    }
 }
 
 run {
     standardInput = System.in
 }
 
-
-
 tasks.named('test') {
     // Use JUnit Platform for unit tests.
     useJUnitPlatform()
 }
-
-tasks.register("admin", JavaExec){
-    group = "ChatAppConsole"
-    description = "Runs the server + the admin client"
-    mainClass.set("ChatApp")
-    classpath = sourceSets.main.runtimeClasspath
-    standardInput = System.in
-}
-
-tasks.register("server", JavaExec){
-    group = "ChatAppConsole"
-    description = "Runs the headless server"
-    mainClass.set("ChatAppServer")
-    classpath = sourceSets.main.runtimeClasspath
-    standardInput = System.in
-}
-
-tasks.register("client", JavaExec) {
-    group = "ChatAppConsole"
-    description = "Runs the client"
-    mainClass.set("ChatAppClient")
-    classpath = sourceSets.main.runtimeClasspath
-    standardInput = System.in
-}
-
-tasks.register("serverGUI", JavaExec) {
-    group = "ChatAppGUI"
-    description = "Runs a GUI for the server"
-    mainClass.set('server.ServerGUI')
-    classpath = sourceSets.main.runtimeClasspath
-}