Porque

import javax.swing.*;

public class ProgL
{
	private int x=1;
	
	public static int  retorna()
	{
		int x=5;
		
		return x;
		
		
	}
	//****************************************************
	public static void main(String args[])
	{
		int aux;
		String saida;
		JTextArea texto = new JTextArea(10,10);
		saida="Prog\n";
		
		
		saida+=x;
	
	   
		
		texto.setText(saida);
		
		JOptionPane.showMessageDialog(null,texto);
		
	}
}