New method in MainActivity.java

/**
 * This method displays the given text on the screen.
 */
private void displayMessage(String message) {
    TextView priceTextView = (TextView) findViewById(R.id.price_text_view);
    priceTextView.setText(message);
}

currently the extension to MainActivity in Android Studio is .kt so when I paste de code in Java appears a pop up window with the message to change to kotlin extension but my code is whit 8 errors, I write the right code like catherine said but It still does not work. Can anyone help me?

`package com.example.android.justjava

import android.R
import android.os.Bundle
import android.view.View
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity
import java.text.NumberFormat

/**

• This app displays an order form to order coffee.
  */
  class MainActivity : AppCompatActivity() {

  var quantity = 0

  override fun onCreate(savedInstanceState: Bundle?) {
  super.onCreate(savedInstanceState)
  setContentView(R.layout.activity_main)
  }

  /**

  • This method is called when the increment button is clicked.
    */
    fun increment(view: View?) {
    var int = quantity
    quantity += 1
    display (quantity)

    }

  /**

  • This method is called when the decrement button is clicked.
    */
    fun decrement(view: View?) {
    var int = quantity
    quantity -= 1
    display (quantity)

  }

  /**

  • This method is called when the order button is clicked.
    */
    fun submitOrder(view: View?) {
    String priceMessage = "Free"
    displayMessage(priceMessage)

  }

  /**

  • This method displays the given quantity value on the screen.
    */
    private fun display(number: Int) {
    val quantityTextView = findViewById(R.id.quantity_text_view) as TextView
    quantityTextView.text = "" + number
    }

  /**

  • This method displays the given price on the screen.
    */
    private fun displayPrice(number: Int) {
    val priceTextView = findViewById(R.id.price_text_view) as TextView
    priceTextView.setText(NumberFormat.getCurrencyInstance().format(number))
    }

  /**

  • This method displays the given text on the screen.
    */
    private fun displayMessage(message: String) {
    val priceTextView = findViewById(R.id.price_text_view) as TextView
    priceTextView.text = message
    }
    }`

This string message will help to crash any business in few time!!

public void submit (View view){
String priceTextView = "Free";
displayMessage(priceTextView);
}

/**

• This method displays the given text on the screen.
  */
  private void displayMessage(String message) {
  TextView priceTextView = (TextView) findViewById(R.id.price_text_view);
  priceTextView.setText(message);
  }

Thank you! 😊

ok thanks

Thank you

THANK YOU VERY MUCH

Thanksgiving so much

Thanks so much!!

good thank you

"Free"

Thanks!

Very good thank you very much