还是上面的问题继承出现java.lang.NullPointerException

Question

代码如下
package aa;
import javax.swing.JFrame;
import javax.swing.JRadioButton;
import java.awt.Rectangle;
import javax.swing.ButtonGroup;
import javax.swing.JLabel;
import javax.swing.JButton;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.Dimension;public class toupiao extends JFrame{
    int a=0,b=0,c=0;
    JRadioButton jRadioButton1 = new JRadioButton();
    JRadioButton jRadioButton2 = new JRadioButton();
    JRadioButton jRadioButton3 = new JRadioButton();
    ButtonGroup buttonGroup1 = new ButtonGroup();
    JLabel jLabel1 = new JLabel();
    JLabel jLabel2 = new JLabel();
    JLabel jLabel3 = new JLabel();
    JButton jButton1 = new JButton();
    JButton jButton2 = new JButton();
    public toupiao() {
        try {
            jbInit();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }    private void jbInit() throws Exception {
         
        this.getContentPane().setLayout(null);
        setSize(new Dimension(400, 300));
        jRadioButton1.setText("jRadioButton1");
        jRadioButton1.setBounds(new Rectangle(30, 65, 128, 16));
        jButton2.addActionListener(new toupiao_jButton2_actionAdapter(this));
        this.getContentPane().add(jRadioButton1);
        jRadioButton3.setText("jRadioButton3");
        jRadioButton3.setBounds(new Rectangle(39, 166, 95, 14));
        this.getContentPane().add(jRadioButton2);
        this.getContentPane().add(jRadioButton3);
        this.getContentPane().add(jLabel1);
        this.getContentPane().add(jLabel2);
        this.getContentPane().add(jLabel3);
        this.getContentPane().add(jButton1);
        this.getContentPane().add(jButton2);
        jRadioButton2.setText("jRadioButton2");
        jRadioButton2.setBounds(new Rectangle(35, 114, 98, 15));
        jLabel1.setBounds(new Rectangle(236, 66, 109, 14));
        jLabel2.setBounds(new Rectangle(235, 111, 69, 16));
        jLabel3.setBounds(new Rectangle(240, 166, 79, 14));
        jButton1.setBounds(new Rectangle(52, 223, 107, 19));
        jButton1.setText("jButton1");
        jButton1.addActionListener(new toupiao_jButton1_actionAdapter(this));
        jButton2.setBounds(new Rectangle(241, 223, 93, 23));
        jButton2.setText("jButton2");
        buttonGroup1.add(jRadioButton1);
        buttonGroup1.add(jRadioButton2);
        buttonGroup1.add(jRadioButton3);
    }
public static void main(String []args){
    toupiao tp=new toupiao();
    tp.setVisible(true);
}
    public void jButton1_actionPerformed(ActionEvent e) {
       // 这里要实现的是点一下按钮对应的jLabel++，是累积的效果
        if(jRadioButton1.isSelected()==true){
            a++;
        }
        if(jRadioButton2.isSelected()==true){
            b++;
        }
        if(jRadioButton3.isSelected()==true){
            c++;
        }
        jLabel1.setText(a+"");
        jLabel2.setText(b+"");
        jLabel3.setText(c+"");    }    public void jButton2_actionPerformed(ActionEvent e) {
        System.exit(0);
    }
}
class toupiao_jButton2_actionAdapter implements ActionListener {
    private toupiao adaptee;
    toupiao_jButton2_actionAdapter(toupiao adaptee) {
        this.adaptee = adaptee;
    }    public void actionPerformed(ActionEvent e) {
        adaptee.jButton2_actionPerformed(e);
    }
}
class toupiao_jButton1_actionAdapter implements ActionListener {
    private toupiao adaptee;
    toupiao_jButton1_actionAdapter(toupiao adaptee) {
        this.adaptee = adaptee;
    }    public void actionPerformed(ActionEvent e) {
        adaptee.jButton1_actionPerformed(e);
    }
}
//但是在进入Design就不能再移动里面的东西还报java.lang.NullPointerException，高手帮忙搞一下谢谢！！！！

Answer 1

class   toupiao_jButton2_actionAdapter   implements   ActionListener   { 
        private   toupiao   adaptee; 
        toupiao_jButton2_actionAdapter(toupiao   adaptee)   { 
                this.adaptee   =   adaptee; 
        } 
  //这里要实例化对象，否则容易出出对象NullPointerException, 还有问题请提清楚点，你这样子的问题，高手一般不会回答，象我这样的新手又 回答得不是很清楚，对象最重要的是要看其指向，
        public   void   actionPerformed(ActionEvent   e)   { 
                adaptee.jButton2_actionPerformed(e); 
        } 
} 
class   toupiao_jButton1_actionAdapter   implements   ActionListener   { 
        private   toupiao   adaptee; 
        toupiao_jButton1_actionAdapter(toupiao   adaptee)   { 
                this.adaptee   =   adaptee; 
        }         public   void   actionPerformed(ActionEvent   e)   { 
                adaptee.jButton1_actionPerformed(e); 
        } 
}