Question

I encountered a code where this() method in java takes three parameters two being integers and the third one is boolean value.
what exactly does that mean ? Are there any other variants of this() method ?
Hera is the actual code.

 public SegmentConstructor(int seqNum_, int length_) {
        this(seqNum_, length_, false);
    }

Thank You..

Answer 1

It means that there is another constructor in the current class that has that signature.

public SegmentConstructor(int seqNum_, int length_) {
    this(seqNum_, length_, false); // calls the constructor below.
}

public SegmentConstructor(int seqNum_, int length_, boolean required_) {
    seqNum = seqNum_;
    length = length_;
    required = required_;
}

The this method is just a way to call one of your class’s constructors from within another constructor, to help avoid code duplication. It can only be called on the first line of a constructor–never from within any other method.