Implement a said Phone number (with area code and number, such as 010-68911205) Phone Class, one of the constructor parameters should be said the phone number of the string. Achieve the set requirements And get functions to set and get the phone number of the area code (area, such as 010) and number (number, Such as 68911205), rewrite the Object. The toString () function to print out the phone number. (hint: can use String. The indexOf () and the String. The substring () function)

Phonenum.java

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