GUI

import java.awt.Button;
import java.awt.Checkbox;
import java.awt.Color;
import java.awt.Font;
import java.awt.Frame;
import java.awt.Label;
import java.awt.TextArea;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.border.CompoundBorder;



public class GUI implements ActionListener
{
    JFrame mainframe=new JFrame("Software für Kalkulationen");
    JLabel ueberschrift=new JLabel();
    JLabel name=new JLabel();
    Button bcalc=new Button();
    Button vcalc=new Button();

    public void guierstellen() {


            mainframe.setBounds(100, 100, 400, 230);
            mainframe.setLayout(null);
            mainframe.setResizable(false);

            ueberschrift.setBounds(15,20,500,20);
            ueberschrift.setFont(new Font("Verdana", Font.BOLD,20));
            ueberschrift.setForeground(Color.BLACK);
            ueberschrift.setText("Software für Preiskalkulationen");

            name.setFont(new Font("Verdana", Font.PLAIN,14));
            name.setForeground(Color.BLACK);
            name.setBounds(50,60,500,30);
            name.setText("Wählen Sie aus folgenden Optionen aus:");

            bcalc.setFont(new Font("Verdana", Font.PLAIN, 16));
            bcalc.setBounds(65,100,250,30);
            bcalc.setLabel("Bezugspreiskalkulation");
            bcalc.addActionListener(this);


            vcalc.setFont(new Font("Verdana", Font.PLAIN, 16));
            vcalc.setBounds(65,140,250,30);
            vcalc.setLabel("Verkaufskalkulation");
            vcalc.addActionListener(this);

            mainframe.setVisible(true);
            mainframe.add(ueberschrift);
            mainframe.add(name);
            mainframe.add(bcalc);
            mainframe.add(vcalc);
    }
    public void actionPerformed(ActionEvent e)
    {

        if (e.getSource()==bcalc)
        {
            Bezugskalkulation bsp=new Bezugskalkulation();
            bsp.guierstellen();
        }
        else if (e.getSource()==vcalc)
        {
            Verkaufskalkulation bsp=new Verkaufskalkulation();
            Verkaufskalkulation.guierstellen();
        }
    }
}