Java程序编写一个计算器类,要求实现加、减、乘、除运算,注意在进行除 ...答:JButton bCancel; //清除按钮private JButton[] b=new JButton[16]; //构造按钮数组private char LastOp; //操作符号private boolean Countable; //用于判断是否可计算private String KeyLabel[]={"7","8","9","/","4","5","6","*","1","2","3","-","0","."...