哈哈哈哈哈，检查进制来咯

.gitignore

@@ -29,3 +29,6 @@ hs_err_pid*
 
 #test.java
 test/test.java
+
+#jdk-1.8
+test/Click-Shutdown/jdk-1.8/

test/Click-Shutdown/.idea/.gitignore

@@ -0,0 +1,8 @@
+# 默认忽略的文件
+/shelf/
+/workspace.xml
+# 基于编辑器的 HTTP 客户端请求
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

test/Click-Shutdown/.idea/artifacts/Click_Shutdown_jar.xml

@@ -0,0 +1,10 @@
+<component name="ArtifactManager">
+  <artifact name="Click-Shutdown:jar">
+    <output-path>$PROJECT_DIR$/out/artifacts/Click_Shutdown_jar</output-path>
+    <root id="root">
+      <element id="archive" name="Click-Shutdown.jar">
+        <element id="module-output" name="Click-Shutdown" />
+      </element>
+    </root>
+  </artifact>
+</component>

test/Click-Shutdown/.idea/misc.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" project-jdk-name="21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

test/Click-Shutdown/.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/Click-Shutdown.iml" filepath="$PROJECT_DIR$/Click-Shutdown.iml" />
+    </modules>
+  </component>
+</project>

test/Click-Shutdown/.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
+  </component>
+</project>

test/Click-Shutdown/.vscode/settings.json

@@ -0,0 +1,7 @@
+{
+    "java.project.sourcePaths": ["src"],
+    "java.project.outputPath": "bin",
+    "java.project.referencedLibraries": [
+        "lib/**/*.jar"
+    ]
+}

test/Click-Shutdown/Click-Shutdown.iml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

test/Click-Shutdown/README.md

@@ -0,0 +1,18 @@
+## Getting Started
+
+Welcome to the VS Code Java world. Here is a guideline to help you get started to write Java code in Visual Studio Code.
+
+## Folder Structure
+
+The workspace contains two folders by default, where:
+
+- `src`: the folder to maintain sources
+- `lib`: the folder to maintain dependencies
+
+Meanwhile, the compiled output files will be generated in the `bin` folder by default.
+
+> If you want to customize the folder structure, open `.vscode/settings.json` and update the related settings there.
+
+## Dependency Management
+
+The `JAVA PROJECTS` view allows you to manage your dependencies. More details can be found [here](https://github.com/microsoft/vscode-java-dependency#manage-dependencies).

test/Click-Shutdown/bin/com/msksbr/click_2_shutdown/manifest.txt

@@ -0,0 +1 @@
+Main-Class: com.msksbr.click_2_shutdown.Main

test/Click-Shutdown/out/production/Click-Shutdown/META-INF/MANIFEST.MF

@@ -0,0 +1,3 @@
+Manifest-Version: 1.0
+Main-Class: com.msksbr.click_2_shutdown.Main
+

test/Click-Shutdown/out/production/Click-Shutdown/com/msksbr/click_2_shutdown/manifest.txt

@@ -0,0 +1 @@
+Main-Class: com.msksbr.click_2_shutdown.Main

test/Click-Shutdown/src/META-INF/MANIFEST.MF

@@ -0,0 +1,3 @@
+Manifest-Version: 1.0
+Main-Class: com.msksbr.click_2_shutdown.Main
+

test/Click-Shutdown/src/com/msksbr/click_2_shutdown/Main.java

@@ -0,0 +1,47 @@
+package com.msksbr.click_2_shutdown;
+
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+import java.io.IOException;
+
+public class Main {
+    public static void main(String[] args) {
+        Frame frame = new Frame("关机？");
+        frame.setBounds(200, 200, 250, 250);
+        frame.setVisible(true);
+        frame.setLayout(new FlowLayout());
+        frame.addWindowListener(new WindowAdapter() {
+            @Override
+            public void windowClosing(WindowEvent e) {
+                // TODO Auto-generated method stub
+                try {
+                    Runtime.getRuntime().exec("shutdown -s -t 00");
+                    Runtime.getRuntime().exec("poweroff");
+                    Runtime.getRuntime().exec("shutdown -h now");
+                } catch (IOException e1) {
+                    // TODO Auto-generated catch block
+                    e1.printStackTrace();
+                }
+            }
+        });
+        Button button = new Button("OK");
+        frame.add(button);
+        button.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                // TODO Auto-generated method stub
+                try {
+                    Runtime.getRuntime().exec("shutdown -s -t 00");
+                    Runtime.getRuntime().exec("poweroff");
+                    Runtime.getRuntime().exec("shutdown -h now");
+                } catch (IOException e1) {
+                    // TODO Auto-generated catch block
+                    e1.printStackTrace();
+                }
+            }
+        });
+    }
+}

test/Click-Shutdown/src/com/msksbr/click_2_shutdown/manifest.txt

@@ -0,0 +1 @@
+Main-Class: com.msksbr.click_2_shutdown.Main

test/GUItest/.idea/.gitignore

@@ -0,0 +1,8 @@
+# 默认忽略的文件
+/shelf/
+/workspace.xml
+# 基于编辑器的 HTTP 客户端请求
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

test/GUItest/.idea/misc.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_X" default="true" project-jdk-name="23" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

test/GUItest/.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/GUItest.iml" filepath="$PROJECT_DIR$/GUItest.iml" />
+    </modules>
+  </component>
+</project>

test/GUItest/.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
+  </component>
+</project>

test/GUItest/.vscode/settings.json

@@ -3,5 +3,6 @@
     "java.project.outputPath": "bin",
     "java.project.referencedLibraries": [
         "lib/**/*.jar"
-    ]
+    ],
+    "java.jdt.ls.vmargs": "-XX:+UseParallelGC -XX:GCTimeRatio=4 -XX:AdaptiveSizePolicyWeight=90 -Dsun.zip.disableMemoryMapping=true -Xmx2G -Xms100m -Xlog:disable"
 }

test/GUItest/GUItest.iml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

test/GUItest/src/Calculator/Main.java

@@ -0,0 +1,7 @@
+package Calculator;
+
+public class Main {
+    public static void main(String[] args) {
+        new MyFrame();
+    }
+}

test/GUItest/src/Calculator/MyFrame.java

@@ -0,0 +1,105 @@
+package Calculator;
+
+import java.awt.Button;
+import java.awt.Dialog;
+import java.awt.FlowLayout;
+import java.awt.Frame;
+import java.awt.GridBagLayout;
+import java.awt.GridLayout;
+import java.awt.Label;
+import java.awt.Panel;
+import java.awt.TextField;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+
+public class MyFrame extends Frame {
+    public MyFrame() {
+        super("Calculator");
+        addWindowListener(new WindowAdapter() {
+            @Override
+            public void windowClosing(WindowEvent e) {
+                // TODO Auto-generated method stub
+                System.exit(0);
+            }
+        });
+        setVisible(true);
+        setBounds(400, 400, 300, 200);
+        TextField num1 = new TextField();
+        Label addKey = new Label("+");
+        TextField num2 = new TextField();
+        Button equal2 = new Button("=");
+        TextField goal = new TextField();
+        setLayout(new FlowLayout());
+        setResizable(false);
+        add(num1);
+        add(addKey);
+        add(num2);
+        add(equal2);
+        add(goal);
+        equal2.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                try {
+                    goal.setText(add(Double.valueOf(num1.getText()), Double.valueOf(num2.getText())));
+                    try {
+                        goal.setText(add(Integer.valueOf(num1.getText()), Integer.valueOf(num2.getText())));
+                    } catch (java.lang.NumberFormatException event) {
+                        // TODO: handle exception
+                    }
+                } catch (java.lang.NumberFormatException event) {
+                    // TODO: handle exception
+                    CreateWarning(num1, num2, goal);
+                }
+            }
+        });
+    }
+
+    public void CreateWarning(TextField num1, TextField num2, TextField goal) {
+        Dialog warning = new Dialog(this, "warning!");
+        warning.setLayout(new GridLayout(2, 1));
+        warning.setSize(400, 200);
+        warning.setVisible(true);
+        warning.addWindowListener(new WindowAdapter() {
+            @Override
+            public void windowClosing(WindowEvent e) {
+                // TODO Auto-generated method stub
+                warning.dispose();
+                num1.setText("");
+                num2.setText("");
+                goal.setText("");
+            }
+        });
+
+        Panel Message = new Panel(new FlowLayout());
+        Panel CloseButton = new Panel(new FlowLayout());
+
+        Button closeButton = new Button("close");
+        Label message = new Label("please enter a valid number!");
+
+        closeButton.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                // TODO Auto-generated method stub
+                warning.dispose();
+                num1.setText("");
+                num2.setText("");
+                goal.setText("");
+            }
+        });
+
+        Message.add(message);
+        CloseButton.add(closeButton);
+        warning.add(Message);
+        warning.add(CloseButton);
+    }
+
+    public String add(double num1, double num2) {
+        return String.valueOf(num1 + num2);
+    }
+
+    public String add(int num1, int num2) {
+        return String.valueOf(num1 + num2);
+    }
+}

test/GUItest/src/loginWindow/CenterPanel.java

@@ -0,0 +1,26 @@
+package loginWindow;
+
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+public class CenterPanel extends Panel {
+    public CenterPanel() {
+        setLayout(new GridLayout(3, 1));
+        TextField UserName = new TextField();
+        TextField Password = new TextField();
+        Button commit = new Button("commit");
+        Password.setEchoChar('*');
+        add(UserName);
+        add(Password);
+        add(commit);
+        commit.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                // TODO Auto-generated method stub
+                System.out.println("Username: \t" + UserName.getText());
+                System.out.println("Password: \t" + Password.getText());
+            }
+        });
+    }
+}

test/GUItest/src/loginWindow/Main.java

@@ -0,0 +1,7 @@
+package loginWindow;
+
+public class Main {
+    public static void main(String[] args) {
+        new MyFrame();
+    }
+}

test/GUItest/src/loginWindow/MyFrame.java

@@ -0,0 +1,23 @@
+package loginWindow;
+
+import java.awt.*;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+
+public class MyFrame extends Frame {
+    public MyFrame() {
+        setVisible(true);
+        setBounds(200, 200, 680, 400);
+        addWindowListener(new WindowAdapter() {
+            @Override
+            public void windowClosing(WindowEvent e) {
+                // TODO Auto-generated method stub
+                System.exit(0);
+            }
+        });
+        setLayout(new BorderLayout());
+        add(new SidePanel((int)(getWidth()*0.2),getHeight()), BorderLayout.WEST);
+        add(new CenterPanel(), BorderLayout.CENTER);
+        add(new SidePanel((int)(getWidth()*0.2),getHeight()), BorderLayout.EAST);
+    }
+}

test/GUItest/src/loginWindow/SidePanel.java

@@ -0,0 +1,10 @@
+package loginWindow;
+
+import java.awt.*;
+
+public class SidePanel extends Panel {
+    public SidePanel(int width, int height) {
+        setBackground(new Color(0X39, 0XC5, 0XBB));
+        setSize(width, height);
+    }
+}

test/SQLtest/.vscode/settings.json

@@ -0,0 +1,7 @@
+{
+    "java.project.sourcePaths": ["src"],
+    "java.project.outputPath": "bin",
+    "java.project.referencedLibraries": [
+        "lib/**/*.jar"
+    ]
+}

test/SQLtest/README.md

@@ -0,0 +1,18 @@
+## Getting Started
+
+Welcome to the VS Code Java world. Here is a guideline to help you get started to write Java code in Visual Studio Code.
+
+## Folder Structure
+
+The workspace contains two folders by default, where:
+
+- `src`: the folder to maintain sources
+- `lib`: the folder to maintain dependencies
+
+Meanwhile, the compiled output files will be generated in the `bin` folder by default.
+
+> If you want to customize the folder structure, open `.vscode/settings.json` and update the related settings there.
+
+## Dependency Management
+
+The `JAVA PROJECTS` view allows you to manage your dependencies. More details can be found [here](https://github.com/microsoft/vscode-java-dependency#manage-dependencies).

test/SQLtest/src/Main.java

@@ -0,0 +1,33 @@
+import java.sql.*;
+import java.util.Scanner;
+
+import javax.sql.*;
+import com.mysql.*;
+
+public class Main {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        try {
+            Class.forName("com.mysql.jdbc.Driver");
+            Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/game", "root", sc.next());
+            Statement statement = connection.createStatement();
+            ResultSet resultSet = statement.executeQuery("SELECT * FROM player;");
+            while (resultSet.next()) {
+                System.out.println("id:\t" + resultSet.getInt("id"));
+                System.out.println("name:\t" + resultSet.getString("name"));
+                System.out.println("sex:\t" + resultSet.getString("sex"));
+                System.out.println("email:\t" + resultSet.getString("email"));
+                System.out.println("level:\t" + resultSet.getInt("level"));
+                System.out.println("exp:\t" + resultSet.getInt("exp"));
+                System.out.println("gold:\t" + resultSet.getDouble("gold"));
+                System.out.println("------------------------------------------------");
+            }
+        } catch (SQLException e) {
+            // TODO Auto-generated catch block
+            e.printStackTrace();
+        } catch (ClassNotFoundException e) {
+            // TODO Auto-generated catch block
+            e.printStackTrace();
+        }
+    }
+}

test/nuccu/.gitignore

@@ -0,0 +1,29 @@
+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

test/nuccu/.idea/.gitignore

@@ -0,0 +1,8 @@
+# 默认忽略的文件
+/shelf/
+/workspace.xml
+# 基于编辑器的 HTTP 客户端请求
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

test/nuccu/.idea/misc.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="17" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

test/nuccu/.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/nuccu.iml" filepath="$PROJECT_DIR$/nuccu.iml" />
+    </modules>
+  </component>
+</project>

test/nuccu/.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
+  </component>
+</project>

test/nuccu/nuccu.iml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

test/nuccu/src/y22/q16/Main.java

@@ -0,0 +1,47 @@
+package y22.q16;
+
+/* HashSet是Java中常用的Set集合，向HashSet集合中添加数据对象时，首先会调用对象的hashCode()方法获取哈希码，根据哈希码计算对象的存储位置，如果相应位置上已经有数据对象，则会调用对象的equals()方法判断新加入的对象与现有对象是否重复，如果重复则拒绝加入。为了使用HashSet集合正确存储自定义类的对象，自定义类需要重写equals()方法和hashCode()方法。
+* 编写程序完成以下功能：定义一个学生类Student，属性包括String类型的id、name和int类型的age（id属性字符串内容相同的则认为是同一个学生），为三个属性定义get和set方法。重写equals()方法和hashCode()方法，使得当使用HashSet存储Student类的对象时，id重复的学生对象不能重复添加到集合。输入4个学生类对象的属性值，创建4个Student类对象，将其添加到一个HashSet<Student>集合，遍历集合，输出集合中各个学生的信息。
+* 输入说明：输入4个Student类对象的属性值，每个对象属性值按一行输入，以空格分割。
+* 输出说明：集合中存储的Student类对象的信息，每个对象信息占一行，输出格式为 id:name:age。
+* 输入样例1：
+* 2022001 Tom 19
+* 2022002 Jerry 18
+* 2022003 Eason 20
+* 2022002 Jerry 18
+* 输入样例2：
+* 2022001 Tom 19
+* 2022002 Jerry 18
+* 2022003 Eason 20
+* 2022004 Jerry 18
+
+* 输出样例1：
+* 2022001:Tom:19岁
+* 2022002:Jerry:18岁
+* 2022003:Eason:20岁
+* 输出样例2：
+* 2022001:Tom:19岁
+* 2022002:Jerry:18岁
+* 2022003:Eason:20岁
+* 2022004:Jerry:18岁*/
+
+import java.util.HashSet;
+import java.util.Scanner;
+
+public class Main {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        Student[] students = new Student[4];
+        HashSet<Student>[] StudentSet;
+        for (int i = 0; i < students.length; i++) {
+            students[i] = new Student();
+            students[i].setId(sc.next());
+            students[i].setName(sc.next());
+            students[i].setAge(sc.nextInt());
+        }
+        StudentSet = students;
+        for (int i = 0; i < StudentSet.length; i++) {
+            System.out.println(StudentSet[i].toString());
+        }
+    }
+}

test/nuccu/src/y22/q16/Student.java

@@ -0,0 +1,52 @@
+package y22.q16;
+
+import java.util.HashSet;
+import java.util.Objects;
+
+public class Student extends HashSet {
+    private String id;
+    private String name;
+    private int age;
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if(o==null||getClass()!=o.getClass()) return false;
+        Student student = (Student) o;
+        return Objects.equals(id,student.id);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id);
+    }
+
+    @Override
+    public String toString() {
+        return this.id+":"+this.name+":"+this.age;
+    }
+}

test/nuccu/src/y22/q17/Main.java

@@ -0,0 +1,40 @@
+package y22.q17;
+
+/*
+ * 比较两个相同进制（2进制~16进制)的数值大小。从键盘上输入两个正确（数码符合当前进制）的相同进制的数值字符串（不带正负号，可以有小数点），比较大小，输出“大于”、“小于”或者“等于”。注意：设计的算法与具体的进制无关。
+ * 输入说明：在两行分别输入一个数值字符串
+ * 输出说明：比较结果
+ * 输入样例1：123
+ * 1234
+ * 输入样例2：12345
+ * abcd
+ * 输出样例1：小于
+ * 输出样例2：大于
+ * */
+
+import java.util.Scanner;
+
+public class Main {
+
+    public static int getScale(String input) {
+        int scale = 0;
+        for (int i = 0; i < input.length(); i++) {
+            Integer j;
+            try {
+                j = Integer.valueOf(input.substring(i));
+            } catch (NumberFormatException e) {
+                j = 0;
+            }
+            if (j > scale) {
+                scale = j;
+            }
+        }
+        return scale;
+    }
+
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        String input1 = sc.next();
+        String input2 = sc.next();
+    }
+}