An example of the builder pattern in Java

NewPasteParameters.java

public class NewPasteParameters {

    private final String text;
    private final String title;
    private final Format format;
    private final Visibility visibility;
    private final ExpiryDate expiryDate;

    private NewPasteParameters(String text, String title, Format format, Visibility visibility, ExpiryDate expiryDate) {
        this.text = text;
        this.title = title;
        this.format = format;
        this.visibility = visibility;
        this.expiryDate = expiryDate;
    }

    public String getText() {
        return text;
    }

    public String getTitle() {
        return title;
    }

    public Format getFormat() {
        return format;
    }

    public Visibility getVisibility() {
        return visibility;
    }

    public ExpiryDate getExpiryDate() {
        return expiryDate;
    }

    public static final class Builder {

        private String text;
        private String title;
        private Format format;
        private Visibility visibility;
        private ExpiryDate expiryDate;

        public Builder(String text) {
            if (text == null || text.trim().isEmpty()) {
                throw new IllegalArgumentException("Paste text cannot be null or empty");
            }
            this.text = text;
        }

        public Builder title(String title) {
            this.title = title;
            return this;
        }

        public Builder format(Format format) {
            this.format = format;
            return this;
        }

        public Builder visibility(Visibility visibility) {
            this.visibility = visibility;
            return this;
        }

        public Builder expiryDate(ExpiryDate expiryDate) {
            this.expiryDate = expiryDate;
            return this;
        }

        public NewPasteParameters build() {
            return new NewPasteParameters(text, title, format, visibility, expiryDate);
        }
    }
}