编写一个模拟硬币的applet.每次用户按下“Toss”按钮，程序投掷一个硬币。统计硬币各面出现的次数，并显示结果。程序应该调用不带任何参数的独立方法flip,如果是硬币正面，则方法返回“true” 如果硬币背面，则方法返回“false”.-Write a simulated coin applet. Each time the user presses the " Toss"　button, the program throws a coin. Statistics coin the number of occurrences of each side, and displays the results. Program should be called without any parameters, independent method flip, if it is coin positive, then the method returns " true"　 if the coin on the back, then the method returns " false" .