我的程序是这样的
import javax.swing.*;
import java.awt.event.*;

public class A implements ActionListener {
    JButton button;
    int ClickNum = 0;

    public static void main(String[]args){

        A gui = new A();

        while( ClickNum < 9){
            gui.gogo();
        }

        System.exit(0);
    }

    public void gogo() {

        JFrame frame = new JFrame();
        button = new JButton("click me");


        button.addActionListener(this);


        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().add(button);
        frame.setSize(500,500);
        frame.setVisible(true);

    }   

    public void actionPerformed(ActionEvent event) {
    ClickNum++;
    button.setText("I've been clicked for " + ClickNum );

    }


}




但编译后的结果是
  无法从静态上下文中引用非静态ClickNum


本人是个新人，希望各位大虾详细指点。

while( ClickNum < 9){ //ClickNum是非静态的，不能在静态方法中引用

加一个静态关键字就OK啦,static int ClickNum = 0;