import java.awt.*;
import java.awt.event.*;
import javax.swing.*;


public class Hina9_0 extends JFrame{

    public Hina9_0(){
        //画面の設定
        setSize(700,700);
        setTitle("Java Programing");
                setDefaultCloseOperation(EXIT_ON_CLOSE);

        //パネルを貼り付ける
        MyJPanel    myJPanel= new MyJPanel();
        Container c = getContentPane();    //コンテナの取得
        c.add(myJPanel);        //パネルを貼る

       setVisible(true);
    }

    public static void main(String[] args){
        new Hina9_0();
    }

    public class MyJPanel extends JPanel{

        JTextField textField1;
        JLabel label1;
        double a,b,c;

        public MyJPanel(){
            setBackground(Color.white);
            //setLayout(new GridLayout(2,10));
            textField1 = new JTextField("1.0",4);
            label1 = new JLabel("a");

            a=1.0;b=0.0;c=0.0;

            add(label1);
            add(textField1);

        }

        public void paintComponent(Graphics g){

		    super.paintComponent(g); //画面クリアする。

            Dimension d;
     	    d = getSize();

            //write axis
            g.setColor(new Color(255, 0, 0));
            g.drawLine(0,d.height/2,d.width,d.height/2);
            g.drawLine(d.width/2,0,d.width/2,d.height);            
            g.drawString("x",d.width-20,d.height/2+10);
            g.drawString("y",d.width/2+10,10);
		}

    }
}