java 请看看一个很简单的代码

没怎么系统学习java 靠着上网查点资料 要写一个数学算术题 预想是按下一题的按钮能重新出现一个新题目 运行下来下一题的按钮没反应 可以帮忙看看哪里出错了并指正吗 谢谢
package com.one.component;
import javax.swing.;
//import java.awt.event.ActionEvent;
//import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.Random;
import java.awt.
;

public class Exercisedemo {

public static int g = 1;
public static int i = 0;

public static void main(String[] args) {
    do {
        i = i + 1;
        //for (int i = 0; i < g; i++) {
        Frame frame = new Frame("数学练习题");
        new TextField();
        TextField timu;
        int result;
        Random a = new Random();
        int number1 = a.nextInt(100);
        Random b = new Random();
        int number2 = b.nextInt(100);
        Random c = new Random();
        int number3 = c.nextInt(2);
        if (number3 == 0) {
            result = number1 + number2;
            timu = new TextField(number1 + "+" + number2 + "=");
        } else {
            timu = new TextField(number1 + "-" + number2 + "=");
            result = number1 - number2;
        }
        TextField pingyu = new TextField(30);
        TextField daan = new TextField();
        daan.setColumns(10);
        daan.setEditable(true);
        Button ok = new Button("确认");
        Button over = new Button("结束");
        Button exit = new Button("退出");
        Button next = new Button("下一题");
        Box bbox = Box.createHorizontalBox();
        bbox.add(ok);
        bbox.add(next);
        bbox.add(over);
        bbox.add(exit);
        frame.add(bbox, BorderLayout.SOUTH);
        Box cbox = Box.createHorizontalBox();
        cbox.add(timu);
        cbox.add(daan);
        Box center = Box.createVerticalBox();
        center.add(cbox);
        center.add(pingyu);
        frame.add(center);
        frame.pack();
        frame.setVisible(true);
        //next.setVisible(false);
        ok.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                //super.mouseClicked(e);

                int huida = Integer.parseInt(daan.getText());
                if (huida == result) {
                    pingyu.setText("回答正确");
                } else {
                    pingyu.setText("回答错误");
                }
            }
        });
        next.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                g = g + 1;
            }
        });
        exit.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                System.exit(0);
            }
        });


    } while (i < g);
}

}

将出题的逻辑抽成一个方法,每次触发事件的时候,需要去调用生成题目,然后赋值给组件。
你目前的逻辑,只是触发了事件,并没有去新生成题目并赋值给对应的组件。