【Android・Java】連続でセッターを記述できるようにする方法 ref: http://qiita.com/bassaer/items/52350a13dec4dd6df909

file1.txt

Message message = new Message();
message.setTitle("Hello");
message.setContent("How are you?");
message.setAddress("hoge@foobar.com");
.
.
.

file2.txt

Message message = new Message();
message.setTitle("Hello")
        .setContent("How are you?")
        .setAddress("hoge@foobar.com")
        .setSender("John")
        .send();

file5.txt

new Message.Builder()
        .setTitle("Hello")
        .setContent("How are you?")
        .setAddress("hoge@foobar.com")
        .setSender("John")
        .build();

Message.java

public class Message {

    private String mTitle;
    private String mContent;
    private String mSender;
    private String mAddress;

    static class Builder {
        private Message message;

        public Builder() {
            message = new Message();
        }

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

        public Builder setContent(String content) {
            message.setContent(content);
            return this;
        }

        public Builder setSender(String sender) {
            message.setSender(sender);
            return this;
        }

        public Builder setAddress(String address) {
            message.setAddress(address);
            return this;
        }

        public Message build() {
            return message;
        }
    }