mob app devpmnt-code Exited with Exit code 1

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1

I am studying mob app development.I created a small programme the code is here.But on running it exits .Please help me.

import ‘package:flutter/material.dart’;

void main() {

runApp(const MyApp());

}

class MyApp extends StatelessWidget {

const MyApp({super.key});

@override

Widget build(BuildContext context) {

return MaterialApp(

  title: 'My App',

  home: Scaffold(

    appBar: AppBar(title: const Text('My App')),

    body: const Center(child: Text('Hello, World!')),

  ),

);

}

}

The error log is here

Launching lib\main.dart on sdk gphone64 x86 64 in debug mode…
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:225:22: Error: Can’t find ‘)’ to match ‘(’.
BottomNavigationBar({
^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:183:50: Error: Can’t find ‘}’ to match ‘{’.
class BottomNavigationBar extends StatefulWidget {
^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:249:8: Error: Expected an identifier, but got ‘assert’.
Try inserting an identifier before ‘assert’.
assert(
^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:249:8: Error: Expected ‘}’ before this.
assert(
^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:446:1: Error: Expected ‘{’ before this.
class _BottomNavigationTile extends StatelessWidget {
^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:446:1: Error: Classes can’t be declared inside other classes.
Try moving the class to the top-level.
class _BottomNavigationTile extends StatelessWidget {
^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:446:29: Error: Expected a class member, but got ‘extends’.
class _BottomNavigationTile extends StatelessWidget {
^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:446:37: Error: A method declaration needs an explicit list of parameters.
Try adding a parameter list to the method declaration.
class _BottomNavigationTile extends StatelessWidget {
^^^^^^^^^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:626:1: Error: Classes can’t be declared inside other classes.
Try moving the class to the top-level.
class _Tile extends StatelessWidget {
^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:626:13: Error: Expected a class member, but got ‘extends’.
class _Tile extends StatelessWidget {
^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:626:21: Error: A method declaration needs an explicit list of parameters.
Try adding a parameter list to the method declaration.
class _Tile extends StatelessWidget {
^^^^^^^^^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:660:1: Error: Classes can’t be declared inside other classes.
Try moving the class to the top-level.
class _TileIcon extends StatelessWidget {
^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:660:17: Error: Expected a class member, but got ‘extends’.
class _TileIcon extends StatelessWidget {
^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:660:25: Error: A method declaration needs an explicit list of parameters.
Try adding a parameter list to the method declaration.
class _TileIcon extends StatelessWidget {
^^^^^^^^^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:697:1: Error: Classes can’t be declared inside other classes.
Try moving the class to the top-level.
class _Label extends StatelessWidget {
^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:697:14: Error: Expected a class member, but got ‘extends’.
class _Label extends StatelessWidget {
^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:697:22: Error: A method declaration needs an explicit list of parameters.
Try adding a parameter list to the method declaration.
class _Label extends StatelessWidget {
^^^^^^^^^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:775:1: Error: Classes can’t be declared inside other classes.
Try moving the class to the top-level.
class _BottomNavigationBarState extends State with TickerProviderStateMixin {
^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:775:33: Error: Expected a class member, but got ‘extends’.
class _BottomNavigationBarState extends State with TickerProviderStateMixin {
^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:775:41: Error: A method declaration needs an explicit list of parameters.
Try adding a parameter list to the method declaration.
class _BottomNavigationBarState extends State with TickerProviderStateMixin {
^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:775:68: Error: Expected ‘{’ before this.
class _BottomNavigationBarState extends State with TickerProviderStateMixin {
^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:775:68: Error: Expected a class member, but got ‘with’.
class _BottomNavigationBarState extends State with TickerProviderStateMixin {
^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:775:73: Error: A method declaration needs an explicit list of parameters.
Try adding a parameter list to the method declaration.
class _BottomNavigationBarState extends State with TickerProviderStateMixin {
^^^^^^^^^^^^^^^^^^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:1155:1: Error: Classes can’t be declared inside other classes.
Try moving the class to the top-level.
class _Bar extends StatelessWidget {
^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:1155:12: Error: Expected a class member, but got ‘extends’.
class _Bar extends StatelessWidget {
^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:1155:20: Error: A method declaration needs an explicit list of parameters.
Try adding a parameter list to the method declaration.
class _Bar extends StatelessWidget {
^^^^^^^^^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:1184:1: Error: Classes can’t be declared inside other classes.
Try moving the class to the top-level.
class _Circle {
^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:1226:1: Error: Classes can’t be declared inside other classes.
Try moving the class to the top-level.
class _RadialPainter extends CustomPainter {
^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:1226:22: Error: Expected a class member, but got ‘extends’.
class _RadialPainter extends CustomPainter {
^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:1226:30: Error: A method declaration needs an explicit list of parameters.
Try adding a parameter list to the method declaration.
class _RadialPainter extends CustomPainter {
^^^^^^^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:626:21: Error: ‘StatelessWidget’ is already declared in this scope.
class _Tile extends StatelessWidget {
^^^^^^^^^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:446:37: Context: Previous declaration of ‘StatelessWidget’.
class _BottomNavigationTile extends StatelessWidget {
^^^^^^^^^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:660:25: Error: ‘StatelessWidget’ is already declared in this scope.
class _TileIcon extends StatelessWidget {
^^^^^^^^^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:446:37: Context: Previous declaration of ‘StatelessWidget’.
class _BottomNavigationTile extends StatelessWidget {
^^^^^^^^^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:697:22: Error: ‘StatelessWidget’ is already declared in this scope.
class _Label extends StatelessWidget {
^^^^^^^^^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:446:37: Context: Previous declaration of ‘StatelessWidget’.
class _BottomNavigationTile extends StatelessWidget {
^^^^^^^^^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:1155:20: Error: ‘StatelessWidget’ is already declared in this scope.
class _Bar extends StatelessWidget {
^^^^^^^^^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:446:37: Context: Previous declaration of ‘StatelessWidget’.
class _BottomNavigationTile extends StatelessWidget {
^^^^^^^^^^^^^^^
../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:183:7: Error: The non-abstract class ‘BottomNavigationBar’ is missing implementations for these members:

  • StatefulWidget.createState
    Try to either
  • provide an implementation,
  • inherit an implementation from a superclass or mixin,
  • mark the class as abstract, or
  • provide a ‘noSuchMethod’ implementation.
    class BottomNavigationBar extends StatefulWidget {
    ^^^^^^^^^^^^^^^^^^^
    ../../../Documents/flutter/packages/flutter/lib/src/widgets/framework.dart:800:9: Context: ‘StatefulWidget.createState’ is defined here.
    State createState();
    ^^^^^^^^^^^
    ../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:1277:1: Error: Expected ‘{’ before this.
    ../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:446:1: Error: Expected a function body, but got ‘class’.
    class _BottomNavigationTile extends StatelessWidget {
    ^^^^^
    ../../../Documents/flutter/packages/flutter/lib/src/material/bottom_navigation_bar.dart:446:1: Error: Expected a function body, but got ‘{’.
    class _BottomNavigationTile extends StatelessWidget {
    ^
    Target kernel_snapshot_program failed: Exception

FAILURE: Build failed with an exception.

  • What went wrong:
    Execution failed for task ‘:app:compileFlutterBuildDebug’.

Process ‘command ‘C:\Users\Varghese\Documents\flutter\bin\flutter.bat’’ finished with non-zero exit value 1

  • Try:

Run with --stacktrace option to get the stack trace.
Run with --info or --debug option to get more log output.
Run with --scan to get full insights.
Get more help at https://help.gradle.org.

BUILD FAILED in 5s
Running Gradle task ‘assembleDebug’… 5.3s
Error: Gradle task assembleDebug failed with exit code 1