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    Re: Java How to design - Interface Usage?

    public class Command1 implements Helper{

    //I need to pass the 2nd paramter as type Command1
    @Override
    public StringBuffer addFilter(String query, Command1 dataBase) {

    //concrete...
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    945

    Java How to design - Interface Usage?

    I have a class as shown below.

    This class has a method addFilter with 2 parameters (type String and type Command1 )
    public class Command1 {
    public StringBuffer addFilter(String query,...
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