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。