Builder pattern with compile time check

gistfile1.java

public class Complex {
    
    private Complex() {}

    public static void main(String[] args) {
        new ComplexBuilder()
            .setFirst("first")
            .setSecond("second")
            .setThird( "third" )
            .build();
    }
    
    private String m_first;
    private String m_second;
    private String m_third;

    public static class ComplexBuilder {
        private Complex m_complex;

        public ComplexBuilder() {
            m_complex = new Complex();
        }

        public Builder2 setFirst( String first ) {
            m_complex.m_first = first;
            return new Builder2();
        }

        public class Builder2 {
            private Builder2() {}
            Builder3 setSecond( String second ) {
                m_complex.m_second = second;
                return new Builder3();
            }
        }

        public class Builder3 {
            private Builder3() {}
            Builder4 setThird( String third ) {
                m_complex.m_third = third;
                return new Builder4();
            }
        }

        public class Builder4 {
            private Builder4() {}
            Complex build() {
                return m_complex;
            }
        }
    }
}