Description: Design a simple calculator. In the " operand" tab on the right of the two operand text box, when you click the button operator+,-,*,÷ when performing operations on two operands and the results fill in the " Results" tab the right of the text box
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File list (Check if you may need any files):
java9\.classpath
.....\.project
.....\bin\MyFrame$1.class
.....\...\MyFrame.class
.....\...\MyLstn.class
.....\...\MyLstn1.class
.....\...\MyLstn2.class
.....\...\MyLstn3.class
.....\...\Tt9.class
.....\src\Tt9.java
.....\bin
.....\src
java9