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

public class Panel_2 extends JPanel implements ActionListener {
    JButton bt1, bt3;

    MainFrame mf;  //<-- main繝｡繧ｽ繝�ラ縺ｮ縺ゅｋ縲√€後ヵ繝ｬ繝ｼ繝�縲阪�繧ｯ繝ｩ繧ｹ
    //    縺薙�縲後ヵ繝ｬ繝ｼ繝�縲阪↓縲≫€晉判髱｢��(縺薙�Panel_2縺ｮ縺薙→)窶� 繧� 窶晉判髱｢�停€� 縺ｪ縺ｩ縺ｮ縲後ヱ繝阪Ν縲阪′雋ｼ繧峨ｌ縺ｦ縺�ｋ

    public Panel_2(MainFrame frame){
	mf = frame;   // MainFrame繧ｯ繝ｩ繧ｹ縺ｧ,  p1 = new Panel_2(this); 縺ｨ縺励※蠑墓焚縺ｫthis(<--MainFrame)繧�
	// 貂｡縺励※縺�ｋ�弱€€縺昴ｌ繧貞､画焚縺ｫ蜈･繧後※菫晄戟��

	bt1 = new JButton("逕ｻ髱｢�代∈");
	bt3 = new JButton("逕ｻ髱｢�薙∈");
	add(bt1);
	add(bt3);
	bt1.addActionListener(this);
	bt3.addActionListener(this);
    }

    public void actionPerformed(ActionEvent e) {
	if (e.getSource()==bt1) {
	    // 逕ｻ髱｢�代∈驕ｷ遘ｻ
	    mf.panelChange("逕ｻ髱｢��");    //<-- MainFrame繧ｯ繝ｩ繧ｹ縺ｫ縺ゅｋ panelChange繝｡繧ｽ繝�ラ縺ｧ逕ｻ髱｢縺ｮ陦ｨ遉ｺ繝ｻ髱櫁｡ｨ遉ｺ繧貞�繧頑崛縺医ｋ
	}
	if (e.getSource()==bt3) {
	    // 逕ｻ髱｢�薙∈驕ｷ遘ｻ
	    mf.panelChange("逕ｻ髱｢��");
	}
    }

    // 逕ｻ髱｢縺ｸ謠冗判縺吶ｋ繝励Ο繧ｰ繝ｩ繝�縺ｯ縺薙�繝｡繧ｽ繝�ラ縺ｮ荳ｭ縺ｫ譖ｸ縺�
    public void paintComponent(Graphics g) {
	super.paintComponent(g);
	g.setColor(Color.red);
	g.drawString("縺薙ｌ縺ｯ 逕ｻ髱｢�� 縺ｧ縺�", 325, 300);
	g.fillRect(325, 325, 100, 100);
    }
}