Przykłady baz danych

pom.xml

@@ -20,5 +20,17 @@
             <artifactId>jakarta.json</artifactId>
             <version>2.0.1</version>
         </dependency>
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
+            <version>42.7.3</version>
+            <scope>runtime</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.xerial</groupId>
+            <artifactId>sqlite-jdbc</artifactId>
+            <version>3.46.0.0</version>
+            <scope>runtime</scope>
+        </dependency>
     </dependencies>
 </project>
\ No newline at end of file

src/main/java/gotowe/p01_interakcja/konsola/B_SuroweWejscie2.java

 package gotowe.p01_interakcja.konsola;
 
 import java.io.IOException;
-import java.nio.charset.Charset;
 import java.util.Arrays;
 
 public class B_SuroweWejscie2 {

src/main/java/gotowe/p03_instrukcje/c_switch/Switch3.java

 package gotowe.p03_instrukcje.c_switch;
 
-import java.util.Random;
-
 import javax.swing.JOptionPane;
 
 public class Switch3 {

src/main/java/gotowe/p18_enkapsulacja/v1_brak_enkapsulacji/Student.java

 package gotowe.p18_enkapsulacja.v1_brak_enkapsulacji;
 
-import java.util.ArrayList;
-import java.util.List;
-
 public class Student extends Osoba {
 	String kierunek;
 	int rok;

src/main/java/gotowe/p18_enkapsulacja/v4_po_zmianie/Student.java

@@ -2,10 +2,7 @@ package gotowe.p18_enkapsulacja.v4_po_zmianie;
 
 import java.time.LocalDate;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
-import java.util.function.Function;
-import java.util.stream.DoubleStream;
 
 public class Student extends Osoba {
 	private String kierunek;

src/main/java/gotowe/p19_wyjatki/ZasadyWyjatkow2.java

 package gotowe.p19_wyjatki;
 
-import java.io.File;
-import java.io.IOException;
-import java.util.Scanner;
-
 public class ZasadyWyjatkow2 {
 
 	public static void main(String[] args) {

src/main/java/gotowe/p25_kolekcje/a_list/NoweOperacjeList.java

@@ -2,9 +2,7 @@ package gotowe.p25_kolekcje.a_list;
 
 import java.text.Collator;
 import java.util.ArrayList;
-import java.util.Comparator;
 import java.util.List;
-import java.util.Locale;
 
 public class NoweOperacjeList {
 

src/main/java/gotowe/p25_kolekcje/b_set_map/NoweOperacjeMap.java

 package gotowe.p25_kolekcje.b_set_map;
 
-import java.util.ArrayList;
-import java.util.List;
 import java.util.TreeMap;
 
 public class NoweOperacjeMap {

src/main/java/gotowe/p25_kolekcje/zbieranie_danych/P2_Lista.java

@@ -4,8 +4,6 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.Scanner;
 
-import javax.print.attribute.standard.Sides;
-
 public class P2_Lista {
 	// Listy:
 	// - mogą zawierać duplikaty (tę wartość kilka razy),

src/main/java/gotowe/p25_kolekcje/zbieranie_danych/P2_Lista_Sortowanie.java

@@ -5,8 +5,6 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.Scanner;
 
-import javax.print.attribute.standard.Sides;
-
 public class P2_Lista_Sortowanie {
 	// Listy:
 	// - mogą zawierać duplikaty (tę wartość kilka razy),

src/main/java/gotowe/p31_streamy/c_przeglad_operacji/C21_DistinctSorted.java

@@ -4,7 +4,6 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Collectors;
-import java.util.stream.IntStream;
 
 public class C21_DistinctSorted {
 	public static void main(String[] args) {

src/main/java/gotowe/p31_streamy/c_przeglad_operacji/C22_DistinctSorted.java

@@ -4,7 +4,6 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Collectors;
-import java.util.stream.IntStream;
 
 public class C22_DistinctSorted {
 	public static void main(String[] args) {

src/main/java/gotowe/p31_streamy/c_przeglad_operacji/C23_DistinctSorted.java

@@ -4,7 +4,6 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Collectors;
-import java.util.stream.IntStream;
 
 public class C23_DistinctSorted {
 	public static void main(String[] args) {

src/main/java/gotowe/p31_streamy/d_redukcje_i_grupowanie/Collector_Test.java

 package gotowe.p31_streamy.d_redukcje_i_grupowanie;
 
 import java.util.stream.Collector;
-import java.util.stream.Collector.Characteristics;
 import java.util.stream.Stream;
 
 public class Collector_Test {

src/main/java/gotowe/p40_io/InputStream_DodatkoweMetody.java

@@ -3,7 +3,6 @@ package gotowe.p40_io;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
-import java.io.InputStream;
 
 public class InputStream_DodatkoweMetody {
 

src/main/java/gotowe/p40_io/InputStream_Markowanie.java

@@ -4,7 +4,6 @@ import java.io.BufferedInputStream;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
-import java.io.InputStream;
 
 public class InputStream_Markowanie {
 

src/main/java/gotowe/p40_io/Kopiuj2.java

@@ -4,7 +4,6 @@ import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
-import java.util.Arrays;
 
 public class Kopiuj2 {
 	private static final int ROZMIAR = 4096;

src/main/java/gotowe/p40_io/Kopiuj3_kodowanie.java

@@ -3,8 +3,6 @@ package gotowe.p40_io;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
-import java.io.FileReader;
-import java.io.FileWriter;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.OutputStreamWriter;

src/main/java/gotowe/p42_tekstowe/Odczyt3_BufferedReader_Files.java

 package gotowe.p42_tekstowe;
 
 import java.io.BufferedReader;
-import java.io.FileNotFoundException;
-import java.io.FileReader;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Paths;

src/main/java/gotowe/p42_tekstowe/Odczyt7_Lines.java

@@ -3,7 +3,6 @@ package gotowe.p42_tekstowe;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Paths;
-import java.util.List;
 
 public class Odczyt7_Lines {
 

src/main/java/gotowe/p43_files/FilesProperties.java

@@ -7,10 +7,7 @@ import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.nio.file.attribute.BasicFileAttributes;
 import java.nio.file.attribute.DosFileAttributes;
-import java.nio.file.attribute.PosixFileAttributes;
-import java.nio.file.attribute.PosixFilePermission;
 import java.util.Map;
-import java.util.Set;
 
 public class FilesProperties {
 

src/main/java/gotowe/p43_files/Przenoszenie.java

@@ -3,7 +3,6 @@ package gotowe.p43_files;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
-import java.nio.file.StandardCopyOption;
 
 public class Przenoszenie {
 

src/main/java/gotowe/p43_files/Tworzenie.java

 package gotowe.p43_files;
 
-import java.io.IOException;
 import java.io.OutputStream;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
-import java.nio.file.attribute.FileAttribute;
-import java.nio.file.attribute.PosixFileAttributeView;
-import java.nio.file.attribute.PosixFileAttributes;
-import java.nio.file.attribute.PosixFilePermission;
-import java.nio.file.attribute.PosixFilePermissions;
-import java.nio.file.attribute.UserPrincipal;
 import java.util.Arrays;
-import java.util.Set;
 
 public class Tworzenie {
 

src/main/java/gotowe/p43_files/WczytajWszystko2.java

@@ -4,10 +4,8 @@ import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
-import java.util.Collections;
 import java.util.List;
 import java.util.stream.Collectors;
-import java.util.stream.Stream;
 
 public class WczytajWszystko2 {
 

src/main/java/gotowe/p45_serializacja/Organizm.java

 package gotowe.p45_serializacja;
 
-import java.io.Serializable;
-
 public class Organizm { // implements Serializable {
 	public String gatunek;
 	

src/main/java/gotowe/p46_tcp/Klient1.java

 package gotowe.p46_tcp;
 
 import java.io.IOException;
-import java.io.OutputStream;
 import java.io.PrintWriter;
 import java.net.Socket;
 import java.net.UnknownHostException;

src/main/java/gotowe/p46_tcp/Klient2.java

 package gotowe.p46_tcp;
 
 import java.io.IOException;
-import java.io.OutputStream;
 import java.io.PrintWriter;
 import java.net.Socket;
 import java.net.UnknownHostException;

src/main/java/gotowe/p46_tcp/Serwer2.java

@@ -3,10 +3,8 @@ package gotowe.p46_tcp;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.io.PrintWriter;
 import java.net.ServerSocket;
 import java.net.Socket;
-import java.util.Scanner;
 
 public class Serwer2 {
 

src/main/java/gotowe/p50_watki/kolekcje/ConcMap.java

 package gotowe.p50_watki.kolekcje;
 
-import java.util.Collections;
-import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.ConcurrentMap;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.ThreadLocalRandom;

src/main/java/gotowe/p50_watki/kolekcje/ProdKons1.java

@@ -2,8 +2,6 @@ package gotowe.p50_watki.kolekcje;
 
 import java.util.concurrent.ArrayBlockingQueue;
 import java.util.concurrent.BlockingQueue;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.TimeUnit;
 
 // Kolejki blokujące mają dodatkowo metody take i put, które działają w sposób blokujący.
 

src/main/java/gotowe/p50_watki/pule/PuleWatkow.java

@@ -3,7 +3,6 @@ package gotowe.p50_watki.pule;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
-import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;
 
 public class PuleWatkow {

src/main/java/gotowe/p50_watki/rwlock/CzytelnicyPisarze_Lock.java

@@ -2,9 +2,7 @@ package gotowe.p50_watki.rwlock;
 
 import java.util.Random;
 import java.util.concurrent.locks.Lock;
-import java.util.concurrent.locks.ReadWriteLock;
 import java.util.concurrent.locks.ReentrantLock;
-import java.util.concurrent.locks.ReentrantReadWriteLock;
 
 public class CzytelnicyPisarze_Lock {
 	private Lock lock = new ReentrantLock();