Define a class called Country. A Country has populationSize, area, capital, currency, and a unique abbreviation $($The first $3$ letters from the country name$).$ Define at least two constructors, at least two getter methods, at least two setter methods, and Override the toString$()$ method and the equals$()$ method. The equals$()$ method must return true if the two countries have the same name and same area and false otherwise.

Write a main method, define an array of country objects. You can not add a country whose abbreviation is similar to an already existing country.

Display countries whose area is greater than $10000$ square $Km.$