diff --git a/.gitignore b/.gitignore
index 9154f4c..8ea91a8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,3 +24,4 @@
 hs_err_pid*
 replay_pid*
 
+/.metadata/
diff --git a/Day1/.classpath b/Day1/.classpath
new file mode 100644
index 0000000..463d5f9
--- /dev/null
+++ b/Day1/.classpath
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-21">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>
diff --git a/Day1/.gitignore b/Day1/.gitignore
new file mode 100644
index 0000000..ae3c172
--- /dev/null
+++ b/Day1/.gitignore
@@ -0,0 +1 @@
+/bin/
diff --git a/Day1/.project b/Day1/.project
new file mode 100644
index 0000000..4a1c0a4
--- /dev/null
+++ b/Day1/.project
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Day1</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>
diff --git a/Day1/.settings/org.eclipse.core.resources.prefs b/Day1/.settings/org.eclipse.core.resources.prefs
new file mode 100644
index 0000000..99f26c0
--- /dev/null
+++ b/Day1/.settings/org.eclipse.core.resources.prefs
@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+encoding/<project>=UTF-8
diff --git a/Day1/.settings/org.eclipse.jdt.core.prefs b/Day1/.settings/org.eclipse.jdt.core.prefs
new file mode 100644
index 0000000..9a7984b
--- /dev/null
+++ b/Day1/.settings/org.eclipse.jdt.core.prefs
@@ -0,0 +1,11 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=21
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=21
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=21
diff --git a/Day1/src/StringCheck.java b/Day1/src/StringCheck.java
new file mode 100644
index 0000000..f17686f
--- /dev/null
+++ b/Day1/src/StringCheck.java
@@ -0,0 +1,13 @@
+
+public class StringCheck {
+	public static void main(String[] args) {
+	
+	String[] sentences = new String[4];
+	//　初期化
+	sentences[0]=  "いまなにしてる？";
+	sentences[1]= "何も入力されていません";
+	sentences[2]= "投稿文が長すぎます";
+	sentences[3]= "↓↓↓↓↓↓　投稿されました　↓↓↓↓↓↓";
+	}
+	
+}