java编写编写GUI的双骰游戏。玩家掷两个骰子，计算两个骰子的点数之和。如果第一次掷的和是7或11，玩家赢;如果和为2、3或12则玩家输，庄家赢。如果和为其它数字，则成为玩家的“点数” ，继续掷骰子：如等于点数，玩家赢，如等于7，玩家输，否则，继续掷骰子。

以下是一个简单的Java代码实现：

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;

public class DoubleDiceGame extends JFrame implements ActionListener {
    private JButton btnRoll;
    private JLabel lblResult;
    private int point = 0;
    private Random random = new Random();

    public DoubleDiceGame() {
        setTitle("Double Dice Game");
        setSize(300, 200);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(2, 1));

        btnRoll = new JButton("Roll");
        btnRoll.addActionListener(this);

        lblResult = new JLabel("Roll the dice!");

        panel.add(btnRoll);
        panel.add(lblResult);

        add(panel);

        setVisible(true);
    }

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

    @Override
    public void actionPerformed(ActionEvent e) {
        int sum = rollDice();
        if (point == 0) {
            if (sum == 7 || sum == 11) {
                lblResult.setText("You win!");
            } else if (sum == 2 || sum == 3 || sum == 12) {
                lblResult.setText("You lose!");
            } else {
                point = sum;
                lblResult.setText("Your point is " + point);
            }
        } else {
            if (sum == point) {
                lblResult.setText("You win!");
                point = 0;
            } else if (sum == 7) {
                lblResult.setText("You lose!");
                point = 0;
            } else {
                lblResult.setText("Roll again!");
            }
        }
    }

    private int rollDice() {
        int dice1 = random.nextInt(6) + 1;
        int dice2 = random.nextInt(6) + 1;
        int sum = dice1 + dice2;
        lblResult.setText("You rolled " + dice1 + " + " + dice2 + " = " + sum);
        return sum;
    }
}

这个程序使用了Swing库来创建GUI界面，并且实现了ActionListener接口来处理按钮点击事件。在程序中，rollDice()方法用来模拟掷骰子过程，计算两个骰子的点数之和并展示结果。在actionPerformed()方法中，根据点数的情况决定游戏的输赢，并更新界面上的提示信息。注意在每次游戏结束后需要将点数重置为0。