Builder pattern with TypeScript

// Java
public abstract class Builder {
    public abstract void makeTitle(String title);
    public abstract void makeString(String str);
    public abstract void makeItems(String[] items);
    public abstract void close();
}

// Typescript
abstract class Builder {
  public abstract makeTitle(title: String): void;
  public abstract makeString(str: String): void;
  public abstract makeItems(items: String[]): void;
  public abstract close(): void;
}

// Java
public class Director {
    private Builder builder;
    public Director(Builder builder) {
        this.builder = builder;
    }
    public void construct() { // 문서 구축
        builder.makeTitle("안녕하세요"); // 타이틀
        builder.makeString("아침과 낮에"); // 문자열
        builder.makeItems(new String[]{"좋은 아침입니다", "안녕하세요"}); // 개별 항목
        builder.close(); // 문서 완성
    }
}

// Typescript
class Director {
  private builder: Builder;

  public constructor(builder: Builder) {
    this.builder = builder;
  }

  // 문서 구축
  public construct = (): void => {
    this.builder.makeTitle('안녕하세요'); // 타이틀
    this.builder.makeString('아침과 낮에'); // 문자열
    this.builder.makeItems(['좋은 아침입니다', '안녕하세요']); // 개별 항목
    this.builder.close(); // 문서 완성
  };
}

// Java
public class TextBuilder extends Builder {
    private StringBuffer buffer = new StringBuffer();
    public void makeTitle(String title) { // 타이틀
        buffer.append("=================\n");
        buffer.append("<" + title + ">\n");
    }
    public void makeString(String str) { // 일반 텍스트
        buffer.append(str + "\n");
    }
    public void makeItems(String[] items) { // 개별 항목
        for (int i =0; i < items.length; i++) {
            buffer.append("-" + items[i] + "\n");
        }
    }
    public void close() { // 종료선
        buffer.append("=================\n");
    }
    public String getResult() { // 완성한 문서
        return buffer.toString();
    }
}

// Typescript
class TextBuilder extends Builder {
  private buffer: string[] = [];
  public makeTitle = (title: String): void => {
    this.buffer.push('=================\n');
    this.buffer.push(title + '\n');
  };

  public makeString = (str: String): void => {
    this.buffer.push(str + '\n');
  };

  public makeItems = (items: String[]): void => {
    for (let i = 0; i < items.length; i++) {
      this.buffer.push(items[i] + '\n');
    }
  };

  public close = (): void => {
    this.buffer.push('=================\n');
  };

  public getResult = (): String => {
    return this.buffer.join('');
  };
}

// Java
import java.io.*;

public class HTMLBuilder extends Builder {
    private String filename;
    private PrintWriter writer;
    public void makeTitle(String title) {
        filename = title + ".html";
        // 중략
    }
    public void makeString(String str) {
        writer.println("<p>" + str + "</p>");
    }
    public void makeItems(String[] items) {
        for (int i = 0; i < items.length; i++) {
            // 중략
        }
    }
    public void close() {
        writer.close();
    }
    public String getResult() { // 파일명을 반환
        return filename;
    }
}

public class Main {
    public static void Main(String[] args) {
        if (args.length != 1) {
            usage();
            System.exit(0);
        }
        if (args[0].equals("plain")) {
            TextBuilder textbuilder = new TextBuilder();
            Director director = new Director(textbuilder);
            director.consturct();
            String result = textbuilder.getResult();
            System.out.println(result);
        } else if (args[0].equals("html")) {
            HTMLBuilder htmlbuilder = new HTMLBuilder();
            Director director = new Director(htmlbuilder);
            director.construct();
            String filename = htmlbuilder.getResult();
            System.out.println(filename + "가 작성되었습니다");
        } else {
            usage();
            System.exit(0);
        }
    }

    public static void usage() {
        System.out.println("Usage: java Main plane 일반 텍스트로 문서작성");
        System.out.println("Usage: java Main html  HTML 파일로 문서작성");
    }
}