import javax.swing.*; //components
import java.awt.*; //layout (if we decide we want one)
import java.awt.event.*; //button listener

public class TemperatureConverter extends JFrame 
				implements ActionListener{

	private JButton button;
	private JTextField textBox;
	private JLabel label;

	public TemperatureConverter() {

		super();

		setTitle("Temperature Converter");

		setSize(500, 500);

		setDefaultCloseOperation(EXIT_ON_CLOSE);

		button = new JButton("Calculate!");
		label = new JLabel("Enter a C temperature: ");

		textBox = new JTextField(15);


		button.addActionListener(this);
		setLayout(new FlowLayout());

		add(label);

		add(textBox);

		add(button);

		
		setVisible(true);

	}

	    
        public void actionPerformed(ActionEvent e) {

	    String text = textBox.getText();

	  try {
	    double value = Double.parseDouble(text);

	    value = value * 9 / 5 + 32;

	    text = Double.toString(value);

	    textBox.setText(text);
	  }catch(NumberFormatException exp) {
		textBox.setText("Please enter a number.");		
	  }
       
	}
      

	public static void main(String[] args) {


		new TemperatureConverter();
	}


	/*

	default: BorderLayout

	5 regions to put things: 
		NORTH, SOUTH, EAST, WEST, CENTER
	can only put one thing in each location


	FlowLayout
	   adds things left to right in order,
	  and moves components around based on window size


        GridLayout
	  can specify how many rows and columns to add
	  components in, adds them row by row. 



	*/








}