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package com.example.android.courtcounter;
 
import androidx.appcompat.app.AppCompatActivity;
 
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
 
public class MainActivity extends AppCompatActivity {
    final int POINTS_FOR_FREE_THROW = 3;
    final int POINTS_FOR_TWO_THROW = 2;
    final int POINTS_FOR_ONE_THROW = 1;
    int scoreTeamA = 0;
    int scoreTeamB = 0;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
 
    public void display(int score, String team) {
        TextView scoreView;
        if (team.equals("a")) {
            scoreView = findViewById(R.id.team_a_score);
            scoreView.setText(String.valueOf(score));
        } else if (team.equals("b")) {
            scoreView = findViewById(R.id.team_b_score);
            scoreView.setText(String.valueOf(score));
        }
    }
 
    public void addScore(View view) {
        int id = view.getId();
        switch (id) {
            case R.id.pointsPlusA3_text_view:
                scoreTeamA += POINTS_FOR_FREE_THROW;
                display(scoreTeamA, "a");
                break;
            case R.id.pointsPlusB3_text_view:
                scoreTeamB += POINTS_FOR_FREE_THROW;
                display(scoreTeamB, "b");
                break;
            case R.id.pointsPlusA2_text_view:
                scoreTeamA += POINTS_FOR_TWO_THROW;
                display(scoreTeamA, "a");
                break;
            case R.id.pointsPlusB2_text_view:
                scoreTeamB += POINTS_FOR_TWO_THROW;
                display(scoreTeamB, "b");
                break;
            case R.id.pointsPlusA1_text_view:
                scoreTeamA += POINTS_FOR_ONE_THROW;
                display(scoreTeamA, "a");
                break;
            case R.id.pointsPlusB1_text_view:
                scoreTeamB += POINTS_FOR_ONE_THROW;
                display(scoreTeamB, "b");
                break;
        }
    }
}

Main.java:9: error: class MainActivity is public, should be declared in a file named MainActivity.java
public class MainActivity extends AppCompatActivity {
       ^
Main.java:3: error: package androidx.appcompat.app does not exist
import androidx.appcompat.app.AppCompatActivity;
                             ^
Main.java:5: error: package android.os does not exist
import android.os.Bundle;
                 ^
Main.java:6: error: package android.view does not exist
import android.view.View;
                   ^
Main.java:7: error: package android.widget does not exist
import android.widget.TextView;
                     ^
Main.java:9: error: cannot find symbol
public class MainActivity extends AppCompatActivity {
                                  ^
  symbol: class AppCompatActivity
Main.java:17: error: cannot find symbol
    protected void onCreate(Bundle savedInstanceState) {
                            ^
  symbol:   class Bundle
  location: class MainActivity
Main.java:33: error: cannot find symbol
    public void addScore(View view) {
                         ^
  symbol:   class View
  location: class MainActivity
Main.java:16: error: method does not override or implement a method from a supertype
    @Override
    ^
Main.java:18: error: cannot find symbol
        super.onCreate(savedInstanceState);
        ^
  symbol:   variable super
  location: class MainActivity
Main.java:19: error: package R does not exist
        setContentView(R.layout.activity_main);
                        ^
Main.java:23: error: cannot find symbol
        TextView scoreView;
        ^
  symbol:   class TextView
  location: class MainActivity
Main.java:25: error: package R does not exist
            scoreView = findViewById(R.id.team_a_score);
                                      ^
Main.java:28: error: package R does not exist
            scoreView = findViewById(R.id.team_b_score);
                                      ^
Main.java:36: error: package R does not exist
            case R.id.pointsPlusA3_text_view:
                  ^
Main.java:40: error: package R does not exist
            case R.id.pointsPlusB3_text_view:
                  ^
Main.java:44: error: package R does not exist
            case R.id.pointsPlusA2_text_view:
                  ^
Main.java:48: error: package R does not exist
            case R.id.pointsPlusB2_text_view:
                  ^
Main.java:52: error: package R does not exist
            case R.id.pointsPlusA1_text_view:
                  ^
Main.java:56: error: package R does not exist
            case R.id.pointsPlusB1_text_view:
                  ^
20 errors

Standard output is empty