diff --git a/javalesson1/.classpath b/javalesson1/.classpath
new file mode 100644
index 0000000..463d5f9
--- /dev/null
+++ b/javalesson1/.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/javalesson1/.gitignore b/javalesson1/.gitignore
new file mode 100644
index 0000000..ae3c172
--- /dev/null
+++ b/javalesson1/.gitignore
@@ -0,0 +1 @@
+/bin/
diff --git a/javalesson1/.project b/javalesson1/.project
new file mode 100644
index 0000000..5a607d9
--- /dev/null
+++ b/javalesson1/.project
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>javalesson1</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/javalesson1/.settings/org.eclipse.core.resources.prefs b/javalesson1/.settings/org.eclipse.core.resources.prefs
new file mode 100644
index 0000000..99f26c0
--- /dev/null
+++ b/javalesson1/.settings/org.eclipse.core.resources.prefs
@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+encoding/<project>=UTF-8
diff --git a/javalesson1/.settings/org.eclipse.jdt.core.prefs b/javalesson1/.settings/org.eclipse.jdt.core.prefs
new file mode 100644
index 0000000..9a7984b
--- /dev/null
+++ b/javalesson1/.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/javalesson1/src/javalesson1/StringCheck.java b/javalesson1/src/javalesson1/StringCheck.java
new file mode 100644
index 0000000..24ea66f
--- /dev/null
+++ b/javalesson1/src/javalesson1/StringCheck.java
@@ -0,0 +1,15 @@
+package javalesson1;
+
+public class StringCheck {
+	public static void main(String[] args) {
+		String[] classNames= new String[4];
+		classNames[0]="いまなにしている？";
+		classNames[1]="何も入力されていません";
+	    classNames[2]="投稿文が長すぎます";
+	    classNames[3]="↓↓↓↓↓↓　投稿されました　↓↓↓↓↓↓";
+	    System.out.println(classNames[0]);
+	    System.out.println(classNames[1]);
+	    System.out.println(classNames[2]);
+	    System.out.println(classNames[3]);
+}
+	}