java file for randomnumber

package com.example.randomnumber;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import java.util.Random;

public class MainActivity extends AppCompatActivity {

    Button sub;
    EditText num;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        sub = findViewById(R.id.sub);
        num = findViewById(R.id.num);

        sub.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                String temp = num.getText().toString();
                int num = Integer.parseInt(temp);
                // random number
                Random rand = new Random();
                int r = rand.nextInt(5);

                if (num == r) {
                    Toast.makeText(getApplicationContext(),"Guess Matched! " + "\nRandom Value:" + String.valueOf(r) + "\nInput Value:" + String.valueOf(num), Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(getApplicationContext(),"Guess Not Matched!"+ "\nRandom Value:" + String.valueOf(r) + "\nInput Value:" + String.valueOf(num), Toast.LENGTH_SHORT).show();
                }

            }
        });


    }
}