java.lang.RuntimeException: Unable to start activity ComponentInfo: java.lang.ClassCastException: cannot be cast to android.widget.Button

_x000D_ _x000D_ I tried to get this code working using android studio but the app in the emulator crashes everytime I run it and displays an error which is "App has stopped". I looked at the logcat and got this error. Logcat: 02-11 12:39:49.826 4852-4852/co5025.example.com.week10 E/AndroidRuntime: FATAL EXCEPTION: main Process: co5025.example.com.week10, PID: 4852 java.lang.RuntimeException: Unable to start activity ComponentInfo{co5025.example.com.week10/co5025.example.com.week10.MainActivity}: java.lang.ClassCastException: android.support.v7.widget.AppCompatEditText cannot be cast to android.widget.Button at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707) at android.app.ActivityThread.-wrap12(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6077) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755) Caused by: java.lang.ClassCastException: android.support.v7.widget.AppCompatEditText cannot be cast to android.widget.Button at co5025.example.com.week10.MainActivity.onCreate(MainActivity.java:42) at android.app.Activity.performCreate(Activity.java:6664) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)  at android.app.ActivityThread.-wrap12(ActivityThread.java)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)  at android.os.Handler.dispatchMessage(Handler.java:102)  at android.os.Looper.loop(Looper.java:154)  at android.app.ActivityThread.main(ActivityThread.java:6077)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)  MainActivity.java package co5025.example.com.week10; import android.app.FragmentManager; import android.content.Intent; import android.os.Bundle; import android.support.design.widget.FloatingActionButton; import android.support.design.widget.Snackbar; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.support.v4.app.FragmentManager.BackStackEntry; public class MainActivity extends AppCompatActivity implements View.OnClickListener { EditText editUsername; EditText editPassword; TextView errorMessage; Button butLogin; private FragmentManager.BackStackEntry v; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab); fab.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG) .setAction("Action", null).show(); } }); editPassword = (EditText) findViewById(R.id.edit_password); editUsername = (EditText) findViewById(R.id.edit_username); butLogin = (Button) findViewById(R.id.edit_username); butLogin.setOnClickListener(this); if (getIntent().getBooleanExtra("EXIT", false)) finish(); } @Override public void onClick(View view) { if (checkPassword()) { Intent i; switch (v.getId()) { case R.id.but_login: i = new Intent(this, GameActivity.class); startActivity(i); break; } }else{ errorMessage = (TextView) findViewById(R.id.error_message); errorMessage.setText("Error: Incorrect Password/Username. Try again!"); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); //noinspection SimplifiableIfStatement if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } public boolean checkPassword(){ if (editUsername.getText().toString().equals("test") && (editPassword.getText().toString().equals("1234"))) return true; else return false; } }