diff --git a/Question11-ConstructorAndStatic/.classpath b/Question11-ConstructorAndStatic/.classpath
new file mode 100644
index 0000000..c771657
--- /dev/null
+++ b/Question11-ConstructorAndStatic/.classpath
@@ -0,0 +1,6 @@
+
+
+
+
+
+
diff --git a/Question11-ConstructorAndStatic/.gitignore b/Question11-ConstructorAndStatic/.gitignore
new file mode 100644
index 0000000..84c048a
--- /dev/null
+++ b/Question11-ConstructorAndStatic/.gitignore
@@ -0,0 +1 @@
+/build/
diff --git a/Question11-ConstructorAndStatic/.project b/Question11-ConstructorAndStatic/.project
new file mode 100644
index 0000000..ba1d001
--- /dev/null
+++ b/Question11-ConstructorAndStatic/.project
@@ -0,0 +1,23 @@
+
+
+ Question11-ConstructorAndStatic
+
+
+
+
+
+ org.eclipse.jdt.core.javabuilder
+
+
+
+
+ org.eclipse.wst.common.project.facet.core.builder
+
+
+
+
+
+ org.eclipse.wst.common.project.facet.core.nature
+ org.eclipse.jdt.core.javanature
+
+
diff --git a/Question11-ConstructorAndStatic/.settings/org.eclipse.jdt.core.prefs b/Question11-ConstructorAndStatic/.settings/org.eclipse.jdt.core.prefs
new file mode 100644
index 0000000..23fa13b
--- /dev/null
+++ b/Question11-ConstructorAndStatic/.settings/org.eclipse.jdt.core.prefs
@@ -0,0 +1,9 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=21
+org.eclipse.jdt.core.compiler.compliance=21
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+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/Question11-ConstructorAndStatic/.settings/org.eclipse.wst.common.project.facet.core.xml b/Question11-ConstructorAndStatic/.settings/org.eclipse.wst.common.project.facet.core.xml
new file mode 100644
index 0000000..c1a8d07
--- /dev/null
+++ b/Question11-ConstructorAndStatic/.settings/org.eclipse.wst.common.project.facet.core.xml
@@ -0,0 +1,4 @@
+
+
+
+
diff --git a/Question11-ConstructorAndStatic/src/main/java/Atm.java b/Question11-ConstructorAndStatic/src/main/java/Atm.java
new file mode 100644
index 0000000..4dbb3b2
--- /dev/null
+++ b/Question11-ConstructorAndStatic/src/main/java/Atm.java
@@ -0,0 +1,20 @@
+
+public class Atm {
+
+ int credit;
+
+ public Atm () {
+ this.credit = 100000;
+ }
+
+ public void withdraw( Wallet wallet , int money ) {
+ if ( this.credit < money ) {
+ System.out.println("預金残高不足です。現金の引き出しに失敗しました。");
+ } else {
+ this.credit = this.credit - money;
+ wallet.money = wallet.money + money;
+ System.out.println("ATMの残り残高は"+this.credit+"です");
+ }
+ }
+
+}
diff --git a/Question11-ConstructorAndStatic/src/main/java/Cat.java b/Question11-ConstructorAndStatic/src/main/java/Cat.java
new file mode 100644
index 0000000..d80b990
--- /dev/null
+++ b/Question11-ConstructorAndStatic/src/main/java/Cat.java
@@ -0,0 +1,14 @@
+
+public class Cat {
+
+ String name;
+
+ public Cat() {
+ this.name = "タマ";
+ }
+
+ public Cat( String name ) {
+ this.name = name;
+ }
+
+}
diff --git a/Question11-ConstructorAndStatic/src/main/java/Jam.java b/Question11-ConstructorAndStatic/src/main/java/Jam.java
new file mode 100644
index 0000000..8d4de8a
--- /dev/null
+++ b/Question11-ConstructorAndStatic/src/main/java/Jam.java
@@ -0,0 +1,10 @@
+
+public class Jam {
+
+ String material;
+
+ public Jam( String jam ) {
+ this.material = jam;
+ }
+
+}
diff --git a/Question11-ConstructorAndStatic/src/main/java/Question11_1.java b/Question11-ConstructorAndStatic/src/main/java/Question11_1.java
new file mode 100644
index 0000000..d8d2d21
--- /dev/null
+++ b/Question11-ConstructorAndStatic/src/main/java/Question11_1.java
@@ -0,0 +1,20 @@
+
+public class Question11_1 {
+
+ public static void main(String[] args) {
+ // TODO 自動生成されたメソッド・スタブ
+
+ Wallet wallet = new Wallet();
+ wallet.money = 10000;
+
+ User user = new User();
+ user.name = "太郎";
+ user.wallet = wallet;
+
+ user.confirmWallet();
+ user.useMoney(1000);
+ user.confirmWallet();
+
+ }
+
+}
diff --git a/Question11-ConstructorAndStatic/src/main/java/Question11_2.java b/Question11-ConstructorAndStatic/src/main/java/Question11_2.java
new file mode 100644
index 0000000..dfc1966
--- /dev/null
+++ b/Question11-ConstructorAndStatic/src/main/java/Question11_2.java
@@ -0,0 +1,20 @@
+
+public class Question11_2 {
+
+ public static void main(String[] args) {
+ // TODO 自動生成されたメソッド・スタブ
+
+ Wallet wallet = new Wallet();
+ wallet.money = 10000;
+
+ Atm atm = new Atm();
+
+ atm.withdraw(wallet,100000);
+ System.out.println(wallet.money);
+
+ atm.withdraw(wallet,100000);
+ System.out.println(wallet.money);
+
+ }
+
+}
diff --git a/Question11-ConstructorAndStatic/src/main/java/Question11_3.java b/Question11-ConstructorAndStatic/src/main/java/Question11_3.java
new file mode 100644
index 0000000..12f1065
--- /dev/null
+++ b/Question11-ConstructorAndStatic/src/main/java/Question11_3.java
@@ -0,0 +1,15 @@
+
+public class Question11_3 {
+
+ public static void main(String[] args) {
+ // TODO 自動生成されたメソッド・スタブ
+
+ Cat cat1 = new Cat();
+ System.out.println(cat1.name);
+
+ Cat cat2 = new Cat("ミケ");
+ System.out.println(cat2.name);
+
+ }
+
+}
diff --git a/Question11-ConstructorAndStatic/src/main/java/Question11_4.java b/Question11-ConstructorAndStatic/src/main/java/Question11_4.java
new file mode 100644
index 0000000..59ff575
--- /dev/null
+++ b/Question11-ConstructorAndStatic/src/main/java/Question11_4.java
@@ -0,0 +1,17 @@
+
+public class Question11_4 {
+
+ public static void main(String[] args) {
+ // TODO 自動生成されたメソッド・スタブ
+
+ Student student = new Student();
+ student.name = "太郎";
+ student.group = "A";
+ student.teacher = "山田";
+
+ student.studentProfile();
+ student.groupProfile();
+
+ }
+
+}
diff --git a/Question11-ConstructorAndStatic/src/main/java/Question11_5.java b/Question11-ConstructorAndStatic/src/main/java/Question11_5.java
new file mode 100644
index 0000000..29cd9af
--- /dev/null
+++ b/Question11-ConstructorAndStatic/src/main/java/Question11_5.java
@@ -0,0 +1,14 @@
+
+public class Question11_5 {
+
+ public static void main(String[] args) {
+ // TODO 自動生成されたメソッド・スタブ
+
+ Jam jam = new Jam("ブルーベリー");
+ Toast toast = new Toast(jam);
+
+ toast.taste();
+
+ }
+
+}
diff --git a/Question11-ConstructorAndStatic/src/main/java/Student.java b/Question11-ConstructorAndStatic/src/main/java/Student.java
new file mode 100644
index 0000000..6417147
--- /dev/null
+++ b/Question11-ConstructorAndStatic/src/main/java/Student.java
@@ -0,0 +1,16 @@
+
+public class Student {
+
+ String name;
+ static String group;
+ static String teacher;
+
+ public void studentProfile() {
+ System.out.println(this.name+"は"+this.group+"教室の生徒です。");
+ }
+
+ public void groupProfile() {
+ System.out.println(this.group+"教室の担任は"+this.teacher+"先生です。");
+ }
+
+}
diff --git a/Question11-ConstructorAndStatic/src/main/java/Toast.java b/Question11-ConstructorAndStatic/src/main/java/Toast.java
new file mode 100644
index 0000000..7b362cf
--- /dev/null
+++ b/Question11-ConstructorAndStatic/src/main/java/Toast.java
@@ -0,0 +1,14 @@
+
+public class Toast {
+
+ Jam jam;
+
+ public Toast(Jam jam) {
+ this.jam = jam;
+ }
+
+ public void taste() {
+ System.out.println(jam.material+"味のトーストです。");
+ }
+
+}
diff --git a/Question11-ConstructorAndStatic/src/main/java/User.java b/Question11-ConstructorAndStatic/src/main/java/User.java
new file mode 100644
index 0000000..0998463
--- /dev/null
+++ b/Question11-ConstructorAndStatic/src/main/java/User.java
@@ -0,0 +1,16 @@
+
+public class User {
+
+ String name;
+ Wallet wallet;
+
+ public void useMoney( int money ) {
+ this.wallet.money = this.wallet.money - money;
+ System.out.println(this.name+"は財布の中のお金を"+money+"円使用しました");
+ }
+
+ public void confirmWallet() {
+ System.out.println(this.name+"の財布の中の残額は"+this.wallet.money+"円です");
+ }
+
+}
diff --git a/Question11-ConstructorAndStatic/src/main/java/Wallet.java b/Question11-ConstructorAndStatic/src/main/java/Wallet.java
new file mode 100644
index 0000000..cc6c2f6
--- /dev/null
+++ b/Question11-ConstructorAndStatic/src/main/java/Wallet.java
@@ -0,0 +1,6 @@
+
+public class Wallet {
+
+ int money;
+
+}