Java moment

Semester 3/Assignments/DBConnectionTest/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>edu.slcc.asdv.caleb</groupId>
+    <artifactId>DBConnectionTest</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <dependencies>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>8.0.33</version>
+        </dependency>
+    </dependencies>
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.source>20</maven.compiler.source>
+        <maven.compiler.target>20</maven.compiler.target>
+        <exec.mainClass>edu.slcc.asdv.caleb.dbconnectiontest.DBConnectionTest</exec.mainClass>
+    </properties>
+</project>

Semester 3/Assignments/DBConnectionTest/src/main/java/edu/slcc/asdv/caleb/dbconnectiontest/DBConnectionTest.java

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+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ */
+
+package edu.slcc.asdv.caleb.dbconnectiontest;
+
+/**
+ *
+ * @author caleb
+ */
+public class DBConnectionTest {
+
+    public static void main(String[] args) {
+        System.out.println("Hello World!");
+    }
+}

Semester 3/Assignments/DBConnectionTest/src/main/java/edu/slcc/asdv/caleb/dbconnectiontest/Database.java

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+package edu.slcc.asdv.caleb.dbconnectiontest;
+
+import java.io.Serializable;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+/**
+ *
+ * @author a. v. markou
+ */
+public class Database
+{
+
+    static String result = "";
+
+    private static Connection connection() //throws InstantiationException, IllegalAccessException
+    {
+
+        String databaseName = "suppliers_parts_23";
+        String userName = "admin";
+        String password = "RangerDog01!";
+        String URL2 = "com.mysql.jdbc.Driver";
+        //String URL2 = "com.mysql.cj.jdbc.Driver";
+        Connection con = null;
+        try
+          {// Load Sun's jdbc driver
+            Class.forName(URL2).newInstance();
+            System.out.println("JDBC Driver loaded!");
+          }
+        catch (Exception e) // driver not found
+          {
+            System.err.println("Unable to load database driver");
+            System.err.println("Details : " + e);
+            return null;
+          }
+        String ip = "localhost"; //internet connection
+        String url = "jdbc:mysql://" + ip + ":3306/" + databaseName;
+        try
+          {
+            con = DriverManager.getConnection(url, userName, password);
+            con.setReadOnly(false);
+          }
+        catch (Exception e)
+          {
+            System.err.println(e.toString());
+            return null;
+          }
+        System.out.println("connection successfull");
+        return con;
+    }
+
+    public String getResult()
+    {
+        return "<p style=\"color:green\">Suppliers <br />" + result;
+
+    }
+
+    public static void closeDatabaseConnection( Connection con)
+    {
+        try
+          {
+            if (con != null)
+              {
+                con.close();
+              }
+          }
+        catch (SQLException e)
+          {
+            result = e.toString();
+            e.printStackTrace();
+          }
+    }
+public static void listAllSuppliers()
+    {
+        Connection con = connection();
+        if (con == null)
+          {
+            result = "cannot connect to database" ;
+            return ;
+          }
+        String table = "";
+        PreparedStatement ps = null;
+        ResultSet rs = null;
+        String sqlStr = "SELECT  *  FROM supplier";
+        try
+          {
+            //prepare statement
+            ps = con.prepareStatement(sqlStr);
+            //execute
+            rs = ps.executeQuery();
+              System.out.println("before entering while");
+            while (rs.next())
+              {
+                  //System.out.println("inside while");
+                String sNumber = rs.getString(1) + " ";
+                String sName = rs.getString(2) + " ";
+                String status = rs.getDate(3) + " ";
+                String city = rs.getString(4) + " ";
+                table += sNumber + sName + status + city + "\n";
+              }
+              System.out.println(table);
+          }
+        catch (Exception ex)
+          {
+            ex.printStackTrace();
+          }
+        finally
+          {
+            try
+              {
+                closeDatabaseConnection(  con);
+                // close the resources 
+                if (ps != null)
+                  {
+                    ps.close();
+                  }
+              }
+            catch (SQLException sqle){ sqle.printStackTrace(); }
+          }
+        result = table;
+    }
+    public static void main(String[] args)
+    {
+        listAllSuppliers();
+    }
+}

Semester 3/Assignments/DBConnectionTest/src/main/java/edu/slcc/asdv/caleb/dbconnectiontest/Scroller.java

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+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+package edu.slcc.asdv.caleb.dbconnectiontest;
+
+/**
+ *
+ * @author caleb
+ */
+public class Scroller {
+    public static void main(String[] args) throws InterruptedException {
+      String string = "Java moment";
+      while (true) {
+      System.out.println(string);
+    System.out.print("\033[H\033[2J");  
+    System.out.flush();  
+      string = string.charAt(string.length() - 1) + string.substring(0, string.length() - 1);
+      Thread.sleep(100);
+    }
+  }
+}