Description: This is easy to use Java to develop the calculator, you can achieve add, subtract, multiply, with the exception of computing
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File list (Check if you may need any files):
............\计算器
............\......\3DPanel.java
............\......\AwtCalc.jar
............\......\AwtCalc.java
............\......\AwtCalcApp.java
............\......\AwtCalcApplet.java
............\......\Border3D.java
............\......\ButtonComponent.java
............\......\ButtonHandler.java
............\......\CalcDisplay.java
............\......\Operator.java
............\......\Panel3D.java