private String[] alist = {"7","8","9","x","4","5","6","/","1","2","3","-",".","0","00","+"}; /* Create Symbols or Name of Button */ ...
In Part 3, you added your first component to the window. A JLabel displayed text on the screen, and you learned the two-step pattern: create the component, then add ...
We will add a JButton to our GUI window using windows command prompt.