update

java8.iml

@@ -1,11 +1,8 @@
 <?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://$MODULE_DIR$">
+  <component name="AdditionalModuleElements">
+    <content url="file://$MODULE_DIR$" dumb="true">
       <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
     </content>
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
   </component>
 </module>

pom.xml

@@ -0,0 +1,29 @@
+<?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>groupId</groupId>
+    <artifactId>java8</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>22</maven.compiler.source>
+        <maven.compiler.target>22</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+        <!-- Add dependencies here if needed -->
+
+        <!-- https://mvnrepository.com/artifact/org.postgresql/postgresql -->
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
+            <version>42.7.3</version>
+        </dependency>
+
+    </dependencies>
+
+</project>

src/main/java/interview_Coding_Questions/FrequencyOfEachCharInArray.java

@@ -0,0 +1,29 @@
+package interview_Coding_Questions;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+public class FrequencyOfEachCharInArray {
+    public static void main(String[] args) {
+
+        List<Integer> arr = Arrays.asList(1,2,3,4,5,62,4,1,0,9,8,7,6,8,3,2,1);
+        Map<Integer, Long> fre = arr.stream().collect(Collectors.groupingBy(Function.identity(),Collectors.counting()));
+
+        System.out.println(fre);
+
+        System.out.println("another method");
+
+        List<Integer> array = Arrays.asList(1,2,3,4,5,62,4,1,0,9,8,7,6,8,3,2,1);
+        Map<Integer,Integer> m =new HashMap<>();
+        for (int a:array){
+            System.out.println(a);
+        }
+
+        System.out.println(m);
+
+    }
+}

src/main/java/jdbcPostgresql/PostgresqlOne.java

@@ -0,0 +1,59 @@
+package jdbcPostgresql;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.Statement;
+
+public class PostgresqlOne {
+    public static void main(String[] args) {
+
+        String url = "jdbc:postgresql://localhost:5432/name";
+        String user = "postgres";
+        String password = "sameer";
+        try(Connection con = DriverManager.getConnection(url,user,password)) {
+            if(con !=null){
+                System.out.println("database connection is right");
+                Statement statement =con.createStatement();
+                String createTable = "CREATE TABLE IF NOT EXISTS name (" +
+                        "id SERIAL PRIMARY KEY, " + // Optionally keep this if you want a unique identifier
+                        "name VARCHAR(50) NOT NULL, " +
+                        "age INT NOT NULL)";
+
+
+                statement.execute(createTable);
+                System.out.println("Table 'name' created or already exists.");
+
+                String addData ="INSERT INTO name (name, age) "
+                        + "VALUES ('sameer', 23), "
+                        + "('ovi', 11), "
+                        + "('rahee', 19)";
+
+                statement.execute(addData);
+                System.out.println("data added in name DB");
+
+                //for printing data from name DB
+
+                String select ="SELECT * FROM name";
+                ResultSet resultSet =statement.executeQuery(select);
+
+                while (resultSet.next()){
+                    int id =resultSet.getInt("id");
+                    String name =resultSet.getString("name");
+                    int age =resultSet.getInt("age");
+                    System.out.println(String.format("Id : %d \n Name : %s\n Age : %d",id,name,age));
+                }
+
+
+
+
+            }else{
+                System.out.println("failed to make connection");
+            }
+
+        }catch (Exception e){
+            System.out.println(e.getMessage());
+        }
+
+    }
+}