diff --git a/.gitignore b/.gitignore
index bb0f519..9e548c7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 *.class
 bin/*
 *.zip
+*.txt
 .DS_Store
\ No newline at end of file
diff --git a/src/main/java/info/istlab/dp/dp1/AbstractFactoryTest.java b/src/main/java/info/istlab/dp/dp1/AbstractFactoryTest.java
new file mode 100644
index 0000000..ae3c612
--- /dev/null
+++ b/src/main/java/info/istlab/dp/dp1/AbstractFactoryTest.java
@@ -0,0 +1,69 @@
+package info.istlab.dp.dp1;
+
+/**
+ * https://www.techscore.com/tech/DesignPattern/AbstractFactory
+ * https://refactoring.guru/ja/design-patterns/abstract-factory
+ */
+public class AbstractFactoryTest {
+    public static void main(String[] args) {
+        NoodleFactory sio_ramen_factory = new SioRamenFactory();
+        Dish dish = sio_ramen_factory.getDish();
+        dish.putSoup(sio_ramen_factory.getSoup());
+        dish.putNoodle(sio_ramen_factory.getNoodle());
+    }
+}
+
+abstract class NoodleFactory {
+    public abstract Soup getSoup();
+    public abstract Noodle getNoodle();
+    public abstract Dish getDish();
+}
+abstract class AbstractRamenFactory extends NoodleFactory {
+    @Override
+    public Noodle getNoodle() { return new Ramen(); }
+    @Override
+    public Dish getDish() {  return new Bowl();  }
+}
+class SioRamenFactory extends AbstractRamenFactory {
+    @Override
+    public Soup getSoup() {  return new SioSoup(); }
+}
+class MisoRamenFactory extends AbstractRamenFactory {
+    @Override
+    public Soup getSoup() {  return new MisoSoup(); }
+}
+class TomatoPastaFactory extends NoodleFactory {
+    @Override
+    public Soup getSoup() {  return new TomatoSource(); }
+    @Override
+    public Noodle getNoodle() { return new Spaghetti(); }
+    @Override
+    public Dish getDish() {  return new Plate(); }
+}
+
+abstract class Soup { /* スープ・ソース */}
+class SioSoup extends Soup {}
+class MisoSoup extends Soup {}
+class CurrySoup extends Soup {}
+class TomatoSource extends Soup {}
+class CreamySource extends Soup {}
+
+abstract class Noodle { /* 麺 */ }
+class Ramen extends Noodle {}
+class Udon extends Noodle {}
+class Soba extends Noodle {}
+class Spaghetti extends Noodle {}
+
+class Dish { /* 食器 */
+    Noodle noodle;
+    Soup soup;
+    void putNoodle(Noodle _n){
+        noodle = _n;
+    }
+    void putSoup(Soup _s){
+        soup = _s;
+    }
+}
+class Bowl extends Dish {}
+class Plate extends Dish {}
+
diff --git a/src/main/java/info/istlab/dp/dp1/FactoryMethodTest.java b/src/main/java/info/istlab/dp/dp1/FactoryMethodTest.java
new file mode 100644
index 0000000..8c59e5f
--- /dev/null
+++ b/src/main/java/info/istlab/dp/dp1/FactoryMethodTest.java
@@ -0,0 +1,66 @@
+package info.istlab.dp.dp1;
+
+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Calendar;
+
+public class FactoryMethodTest {
+    public static void main(String[] args) {
+        TextFile file = TextFile.createTextFile();
+        System.out.println("生成されたオブジェクトのクラスは ["+file.getClass().getSimpleName()+"] です");
+
+        ArrayList<String> lines = new ArrayList<String>();
+        lines.add("aaa");
+        lines.add("bbb");
+        lines.add("ccc");
+        file.write(lines, "logfile.txt");
+
+        Calendar cal = Calendar.getInstance();
+        System.out.println(cal.getClass().getName());
+    }
+}
+
+class TextFile {
+    protected String EOL;
+    protected TextFile(){}
+    public static TextFile createTextFile(){
+        String os = System.getProperty("os.name").toLowerCase();
+        System.out.println(os);
+        if (os.contains("windows")){
+            return new WinTextFile(); // CR LF (0x0D 0x0A) \r\n
+        } else if (os.contains("oldmac")){
+            return new OldMacTextFile(); // CR
+        } else if (os.contains("linux") || os.contains("mac os x")){
+            return new LinuxTextFile(); // LF
+        }
+        return null;
+    }
+    public void write(ArrayList<String> lines, String filename){
+        try {
+			FileWriter filewriter = new FileWriter(filename, false);
+            for(String line: lines){
+				filewriter.write(line + EOL); // 改行の種類
+            }
+			filewriter.close();
+		} catch (IOException e) {
+			System.out.println("WriteError:" + filename);
+		}
+    }
+}
+
+class WinTextFile extends TextFile {
+    WinTextFile(){
+        EOL = "\r\n";
+    }
+}
+class OldMacTextFile extends TextFile {
+    OldMacTextFile(){
+        EOL = "\r";
+    }
+}
+class LinuxTextFile extends TextFile {
+    LinuxTextFile(){
+        EOL = "\n";
+    }
+}