Description: 1. Design: 1. Interface design from the entire panel composed of four panels, the first panel to place the text domain and for the removal of the button panel1.setLayout (new FlowLayout ()) panel1.add (bClear) panel1.add (XsArea) The second panel button and point to place the number of buttons and an equal sign button, using GridLayout layout, line 4 3 panel2.setLayout (new GridLayout (4,3)) panel2.add (b [i]) panel2.add (bPoint ) panel2.add (bEqual) placed third panel computing symbols button, the same used GridLayout layout,
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......\1.doc
......\Calculator.java
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