Create a JavaBean that encapsulates a very simple calculator that will allow the user to enter an arithmetic expression involving two operands. – Essaylink

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(i) Create a JavaBean that encapsulates a very simple calculator that will

 

allow the user to enter an arithmetic expression involving two operands. The

user should be able to carry out the four basic arithmetic operations (using

operators ‘+’, ‘-‘, ‘x’ and ‘/’). Two buttons should be provided, the first of these

to calculate and display the result of the current calculation and the second to

move the result into the field for the first operand (with subsequent fields

being cleared), so that the user can carry out further operations on this result.

The layout should look something like that shown below.

Note that no main method is required (and so there will be no reference to

Main-Class in the subsequent manifest file referred to in the next part of this

exercise).

(ii) Create a manifest file for the above bean and then package the bean and

its manifest within a JAR file. Use the Bean Builder to load this JAR file and

test the working of the bean. 10.4 Create a simple GUI-driven application that makes use of the above bean to

provide the user with a simple calculator. In addition to the bean itself, you

need supply only a ‘Quit’ button.

 

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