A pretty cool builder pattern I discovered in Java

PageTest.java

class Pager {

    private int offset;
    private int limit;

    private Pager() {}

    public static Pager withOffset(int offset) {return new Pager().offset(offset);}
    public Pager offset(int offset) {this.offset = offset; return this;}
    public int offset() {return this.offset;}

    public static Pager withLimit(int limit) {return new Pager().limit(limit);}
    public Pager limit(int limit) {this.limit = limit; return this;}
    public int limit() {return this.limit;}
}

class PageTest {
    public static void main(String[] args) {
        Pager p1 = Pager.withOffset(5);
        assert p1.offset() == 5;
        assert p1.limit() == 0;

        Pager p2 = Pager.withLimit(5);
        assert p2.offset() == 0;
        assert p2.limit() == 5;

        Pager p3 = Pager.withLimit(5).offset(11);
        assert p3.offset() == 11;
        assert p3.limit() == 5;

        Pager p4 = Pager.withOffset(5).limit(3);
        assert p4.offset() == 5;
        assert p4.limit() == 3;
    }
}