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From: Lars Enderin <lars.enderin@telia.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: What does keyword 'this' refer to in the following code?
Date: Wed, 13 Apr 2016 10:58:06 +0200
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2016-04-13 05:03 skrev  cdalten@gmail.com:
> I have another question. What's the significance of map.addMarker().title().snippet().position()?
> 
> Why not just do something like
> map.addMarker()
> map.title()
> map.snippet()
> map.position()
> ?

It's a shorthand, assuming that each method in the chain returns *this*.
If you look at the source for java.lang.StringBuilder, for example,
you'll find methods like

    public StringBuilder append(int i) {
        IntegralToString.appendInt(this, i);
        return this;
    }
and
    public StringBuilder append(double d) {
        RealToString.getInstance().appendDouble(this, d);
        return this;
    }

so you can write statements like
StringBuilder sb = new StringBuilder().append("Pi = ").append(Math.PI);

-- 
Lars Enderin