Thread: New line in TextArea(clicking on radiobutton)

This is the output:
Untitled.jpg
This happens when I input "1" in the quantity textfield.
(The quantity textfield turns null after inputing a value)

But when I put "1" in the quantity textfield and click Oranges, it overwrites the Apples.
Untitled1.jpg

WHat i wanted to happen is that it'll tally my selections. Like this:
((I ONLY EDITED THIS))
12.jpg

These are my codes so far:

import javax.swing.*;
 
import java.awt.*;
import java.awt.event.*;
 
public class Main extends JFrame implements ActionListener{
 
	JLabel lblTitle, lblQty, lblTotal;
	JRadioButton radApple, radOrange, radPomelo;
	JTextField txtQty;
	JTextArea txtScreen;
	Button btnAdd, btnPrint, btnCancel, btnExit, btnStock;
 
	ButtonGroup bg;
 
	Main(){
		getContentPane();
 
		setSize(550,490);
		setVisible(true);
		setLayout(null);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setTitle("Tricia's Grocery Store");
 
		add(lblTitle=new JLabel("Tricia's Grocery Store"));
		lblTitle.setFont(new Font("Broadway", Font.PLAIN, 35));
		lblTitle.setBounds(50,0,600,80);
 
		add(radApple=new JRadioButton("Apples ---------- P15.75"));
		add(radOrange=new JRadioButton("Oranges -------- P12.50"));
		add(radPomelo=new JRadioButton("Pomelos -------- P95.25"));
 
		radApple.setBounds(70,100,150,50);
		radOrange.setBounds(70,130,155,50);
		radPomelo.setBounds(70,160,155,50);
 
		bg = new ButtonGroup();
		bg.add(radApple);
		bg.add(radOrange);
		bg.add(radPomelo);
 
		add(lblQty=new JLabel("Quantity:"));
		lblQty.setBounds(70,200,150,50);
 
		add(txtQty=new JTextField(2));
		txtQty.setBounds(150,210,70,30);
 
		add(lblTotal=new JLabel("P0.00"));
		lblTotal.setBounds(150,500,500,500);
 
		add(btnAdd=new Button("Add Item"));
		btnAdd.setBounds(70,270,80,20);
 
		add(btnPrint=new Button("Print Receipt"));
		btnPrint.setBounds(150,270,80,20);
 
		add(btnCancel=new Button("Reset Values"));
		btnCancel.setBounds(70,290,80,20);
 
		add(btnExit=new Button("Close"));
		btnExit.setBounds(150,290,80,20);
 
		add(txtScreen=new JTextArea());
		txtScreen.setFont(new Font("Courier",Font.PLAIN,15));
		txtScreen.setBounds(250,100,270,320);
		//txtScreen.setEditable(false);
 
 
		btnAdd.addActionListener(this);	
		radApple.addActionListener(this);
		radOrange.addActionListener(this);
		radPomelo.addActionListener(this);
		txtQty.addActionListener(this);
	}
 
	public static void main(String[]args){
		Main main = new Main();
	}
 
 
 
	public void actionPerformed(ActionEvent e) {
		double appleprice=0, orangeprice=0, pomeloprice=0;
		int qty = Integer.parseInt(txtQty.getText());
		String strApples= "", strOranges = "", strPomelos = "";
 
		if (radApple.isSelected()){
			appleprice += 15.75 * qty;
			strApples = ("Apples ------  x" + txtQty.getText()+ " ----- P" + appleprice);
			txtScreen.setText(strApples + strOranges + strPomelos);
			txtQty.setText(null);
		}
		if (radOrange.isSelected()){
			orangeprice += 12.50 * qty;
			strOranges = ("Oranges ------  x" + txtQty.getText()+ " ----- P" + orangeprice);
			txtScreen.setText(strApples + strOranges + strPomelos);
			txtQty.setText(null);
 
		}
		if (radPomelo.isSelected()){
			pomeloprice += 95.25 * qty;
			strPomelos = ("Pomelos ------  x" + txtQty.getText()+ " ----- P" + pomeloprice);
			txtScreen.setText(strApples + strOranges + strPomelos);
			txtQty.setText(null);
		}
 
	}
}