├── .gitignore ├── README.md ├── build.gradle.kts ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── settings.gradle.kts └── src └── main └── java └── org └── hyperskill └── samples ├── oop └── protectedmodifier │ ├── Laptop.java │ ├── MobileGadget.java │ ├── SmartPhone.java │ └── SmartWatch.java ├── serialization ├── SerializationUtils.java └── basics │ ├── Address.java │ ├── Citizen.java │ └── Main.java └── swing ├── components └── HelloFrame.java ├── layouts ├── BorderLayoutExample.java ├── BoxLayoutExample.java ├── FlowLayoutExample.java └── GridLayoutExample.java └── menu └── MenuExample.java /.gitignore: -------------------------------------------------------------------------------- 1 | HELP.md 2 | .gradle 3 | build/ 4 | !gradle/wrapper/gradle-wrapper.jar 5 | !**/src/main/** 6 | !**/src/test/** 7 | 8 | ### STS ### 9 | .apt_generated 10 | .classpath 11 | .factorypath 12 | .project 13 | .settings 14 | .springBeans 15 | .sts4-cache 16 | 17 | ### IntelliJ IDEA ### 18 | .idea 19 | *.iws 20 | *.iml 21 | *.ipr 22 | out/ 23 | 24 | ### NetBeans ### 25 | /nbproject/private/ 26 | /nbbuild/ 27 | /dist/ 28 | /nbdist/ 29 | /.nb-gradle/ 30 | 31 | ### VS Code ### 32 | .vscode/ -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # hs-java-samples 2 | A set of code samples for learners 3 | -------------------------------------------------------------------------------- /build.gradle.kts: -------------------------------------------------------------------------------- 1 | /* 2 | * This file was generated by the Gradle 'init' task. 3 | * 4 | * This generated file contains a sample Java project to get you started. 5 | * For more details take a look at the Java Quickstart chapter in the Gradle 6 | * User Manual available at https://docs.gradle.org/5.6.4/userguide/tutorial_java_projects.html 7 | */ 8 | 9 | plugins { 10 | // Apply the java plugin to add support for Java 11 | java 12 | 13 | // Apply the application plugin to add support for building a CLI application 14 | application 15 | } 16 | 17 | repositories { 18 | // Use jcenter for resolving dependencies. 19 | // You can declare any Maven/Ivy/file repository here. 20 | jcenter() 21 | } 22 | 23 | dependencies { 24 | // This dependency is used by the application. 25 | implementation("com.google.guava:guava:28.0-jre") 26 | 27 | // Use JUnit Jupiter API for testing. 28 | testImplementation("org.junit.jupiter:junit-jupiter-api:5.4.2") 29 | 30 | // Use JUnit Jupiter Engine for testing. 31 | testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.4.2") 32 | } 33 | 34 | application { 35 | // Define the main class for the application 36 | mainClassName = "org.hyperskill.samples.App" 37 | } 38 | 39 | val test by tasks.getting(Test::class) { 40 | // Use junit platform for unit tests 41 | useJUnitPlatform() 42 | } 43 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hyperskill/hs-java-samples/9ee40152a61808576307415a68cac53f396d8af9/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | distributionBase=GRADLE_USER_HOME 2 | distributionPath=wrapper/dists 3 | distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-bin.zip 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env sh 2 | 3 | # 4 | # Copyright 2015 the original author or authors. 5 | # 6 | # Licensed under the Apache License, Version 2.0 (the "License"); 7 | # you may not use this file except in compliance with the License. 8 | # You may obtain a copy of the License at 9 | # 10 | # https://www.apache.org/licenses/LICENSE-2.0 11 | # 12 | # Unless required by applicable law or agreed to in writing, software 13 | # distributed under the License is distributed on an "AS IS" BASIS, 14 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 | # See the License for the specific language governing permissions and 16 | # limitations under the License. 17 | # 18 | 19 | ############################################################################## 20 | ## 21 | ## Gradle start up script for UN*X 22 | ## 23 | ############################################################################## 24 | 25 | # Attempt to set APP_HOME 26 | # Resolve links: $0 may be a link 27 | PRG="$0" 28 | # Need this for relative symlinks. 29 | while [ -h "$PRG" ] ; do 30 | ls=`ls -ld "$PRG"` 31 | link=`expr "$ls" : '.*-> \(.*\)$'` 32 | if expr "$link" : '/.*' > /dev/null; then 33 | PRG="$link" 34 | else 35 | PRG=`dirname "$PRG"`"/$link" 36 | fi 37 | done 38 | SAVED="`pwd`" 39 | cd "`dirname \"$PRG\"`/" >/dev/null 40 | APP_HOME="`pwd -P`" 41 | cd "$SAVED" >/dev/null 42 | 43 | APP_NAME="Gradle" 44 | APP_BASE_NAME=`basename "$0"` 45 | 46 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 47 | DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' 48 | 49 | # Use the maximum available, or set MAX_FD != -1 to use that value. 50 | MAX_FD="maximum" 51 | 52 | warn () { 53 | echo "$*" 54 | } 55 | 56 | die () { 57 | echo 58 | echo "$*" 59 | echo 60 | exit 1 61 | } 62 | 63 | # OS specific support (must be 'true' or 'false'). 64 | cygwin=false 65 | msys=false 66 | darwin=false 67 | nonstop=false 68 | case "`uname`" in 69 | CYGWIN* ) 70 | cygwin=true 71 | ;; 72 | Darwin* ) 73 | darwin=true 74 | ;; 75 | MINGW* ) 76 | msys=true 77 | ;; 78 | NONSTOP* ) 79 | nonstop=true 80 | ;; 81 | esac 82 | 83 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 84 | 85 | # Determine the Java command to use to start the JVM. 86 | if [ -n "$JAVA_HOME" ] ; then 87 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 88 | # IBM's JDK on AIX uses strange locations for the executables 89 | JAVACMD="$JAVA_HOME/jre/sh/java" 90 | else 91 | JAVACMD="$JAVA_HOME/bin/java" 92 | fi 93 | if [ ! -x "$JAVACMD" ] ; then 94 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 95 | 96 | Please set the JAVA_HOME variable in your environment to match the 97 | location of your Java installation." 98 | fi 99 | else 100 | JAVACMD="java" 101 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 102 | 103 | Please set the JAVA_HOME variable in your environment to match the 104 | location of your Java installation." 105 | fi 106 | 107 | # Increase the maximum file descriptors if we can. 108 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then 109 | MAX_FD_LIMIT=`ulimit -H -n` 110 | if [ $? -eq 0 ] ; then 111 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 112 | MAX_FD="$MAX_FD_LIMIT" 113 | fi 114 | ulimit -n $MAX_FD 115 | if [ $? -ne 0 ] ; then 116 | warn "Could not set maximum file descriptor limit: $MAX_FD" 117 | fi 118 | else 119 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 120 | fi 121 | fi 122 | 123 | # For Darwin, add options to specify how the application appears in the dock 124 | if $darwin; then 125 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 126 | fi 127 | 128 | # For Cygwin or MSYS, switch paths to Windows format before running java 129 | if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then 130 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 131 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 132 | JAVACMD=`cygpath --unix "$JAVACMD"` 133 | 134 | # We build the pattern for arguments to be converted via cygpath 135 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 136 | SEP="" 137 | for dir in $ROOTDIRSRAW ; do 138 | ROOTDIRS="$ROOTDIRS$SEP$dir" 139 | SEP="|" 140 | done 141 | OURCYGPATTERN="(^($ROOTDIRS))" 142 | # Add a user-defined pattern to the cygpath arguments 143 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 144 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 145 | fi 146 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 147 | i=0 148 | for arg in "$@" ; do 149 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 150 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 151 | 152 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 153 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 154 | else 155 | eval `echo args$i`="\"$arg\"" 156 | fi 157 | i=$((i+1)) 158 | done 159 | case $i in 160 | (0) set -- ;; 161 | (1) set -- "$args0" ;; 162 | (2) set -- "$args0" "$args1" ;; 163 | (3) set -- "$args0" "$args1" "$args2" ;; 164 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;; 165 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 166 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 167 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 168 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 169 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 170 | esac 171 | fi 172 | 173 | # Escape application args 174 | save () { 175 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done 176 | echo " " 177 | } 178 | APP_ARGS=$(save "$@") 179 | 180 | # Collect all arguments for the java command, following the shell quoting and substitution rules 181 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" 182 | 183 | # by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong 184 | if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then 185 | cd "$(dirname "$0")" 186 | fi 187 | 188 | exec "$JAVACMD" "$@" 189 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @rem 2 | @rem Copyright 2015 the original author or authors. 3 | @rem 4 | @rem Licensed under the Apache License, Version 2.0 (the "License"); 5 | @rem you may not use this file except in compliance with the License. 6 | @rem You may obtain a copy of the License at 7 | @rem 8 | @rem https://www.apache.org/licenses/LICENSE-2.0 9 | @rem 10 | @rem Unless required by applicable law or agreed to in writing, software 11 | @rem distributed under the License is distributed on an "AS IS" BASIS, 12 | @rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | @rem See the License for the specific language governing permissions and 14 | @rem limitations under the License. 15 | @rem 16 | 17 | @if "%DEBUG%" == "" @echo off 18 | @rem ########################################################################## 19 | @rem 20 | @rem Gradle startup script for Windows 21 | @rem 22 | @rem ########################################################################## 23 | 24 | @rem Set local scope for the variables with windows NT shell 25 | if "%OS%"=="Windows_NT" setlocal 26 | 27 | set DIRNAME=%~dp0 28 | if "%DIRNAME%" == "" set DIRNAME=. 29 | set APP_BASE_NAME=%~n0 30 | set APP_HOME=%DIRNAME% 31 | 32 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 33 | set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" 34 | 35 | @rem Find java.exe 36 | if defined JAVA_HOME goto findJavaFromJavaHome 37 | 38 | set JAVA_EXE=java.exe 39 | %JAVA_EXE% -version >NUL 2>&1 40 | if "%ERRORLEVEL%" == "0" goto init 41 | 42 | echo. 43 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 44 | echo. 45 | echo Please set the JAVA_HOME variable in your environment to match the 46 | echo location of your Java installation. 47 | 48 | goto fail 49 | 50 | :findJavaFromJavaHome 51 | set JAVA_HOME=%JAVA_HOME:"=% 52 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 53 | 54 | if exist "%JAVA_EXE%" goto init 55 | 56 | echo. 57 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 58 | echo. 59 | echo Please set the JAVA_HOME variable in your environment to match the 60 | echo location of your Java installation. 61 | 62 | goto fail 63 | 64 | :init 65 | @rem Get command-line arguments, handling Windows variants 66 | 67 | if not "%OS%" == "Windows_NT" goto win9xME_args 68 | 69 | :win9xME_args 70 | @rem Slurp the command line arguments. 71 | set CMD_LINE_ARGS= 72 | set _SKIP=2 73 | 74 | :win9xME_args_slurp 75 | if "x%~1" == "x" goto execute 76 | 77 | set CMD_LINE_ARGS=%* 78 | 79 | :execute 80 | @rem Setup the command line 81 | 82 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 83 | 84 | @rem Execute Gradle 85 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% 86 | 87 | :end 88 | @rem End local scope for the variables with windows NT shell 89 | if "%ERRORLEVEL%"=="0" goto mainEnd 90 | 91 | :fail 92 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 93 | rem the _cmd.exe /c_ return code! 94 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 95 | exit /b 1 96 | 97 | :mainEnd 98 | if "%OS%"=="Windows_NT" endlocal 99 | 100 | :omega 101 | -------------------------------------------------------------------------------- /settings.gradle.kts: -------------------------------------------------------------------------------- 1 | /* 2 | * This file was generated by the Gradle 'init' task. 3 | * 4 | * The settings file is used to specify which projects to include in your build. 5 | * 6 | * Detailed information about configuring a multi-project build in Gradle can be found 7 | * in the user manual at https://docs.gradle.org/5.6.4/userguide/multi_project_builds.html 8 | */ 9 | 10 | rootProject.name = "hs-java-samples" 11 | -------------------------------------------------------------------------------- /src/main/java/org/hyperskill/samples/oop/protectedmodifier/Laptop.java: -------------------------------------------------------------------------------- 1 | package org.hyperskill.samples.oop.protectedmodifier; 2 | 3 | public class Laptop { 4 | 5 | private String info; 6 | 7 | void receiveInfo(String info) { 8 | this.info = info; 9 | } 10 | 11 | } -------------------------------------------------------------------------------- /src/main/java/org/hyperskill/samples/oop/protectedmodifier/MobileGadget.java: -------------------------------------------------------------------------------- 1 | package org.hyperskill.samples.oop.protectedmodifier; 2 | 3 | public class MobileGadget { 4 | 5 | protected void printNotification(String data) { 6 | System.out.println(data); 7 | } 8 | } 9 | -------------------------------------------------------------------------------- /src/main/java/org/hyperskill/samples/oop/protectedmodifier/SmartPhone.java: -------------------------------------------------------------------------------- 1 | package org.hyperskill.samples.oop.protectedmodifier; 2 | 3 | public class SmartPhone extends MobileGadget { 4 | 5 | private Laptop connectedLaptop; 6 | 7 | public SmartPhone() { 8 | this.connectedLaptop = new Laptop(); 9 | } 10 | 11 | private void sendInfoToLaptop(String data) { 12 | printNotification("Sending data to laptop : " + data); 13 | connectedLaptop.receiveInfo(data); 14 | } 15 | } 16 | -------------------------------------------------------------------------------- /src/main/java/org/hyperskill/samples/oop/protectedmodifier/SmartWatch.java: -------------------------------------------------------------------------------- 1 | package org.hyperskill.samples.oop.protectedmodifier; 2 | 3 | public class SmartWatch extends MobileGadget { 4 | 5 | private int avgHeartRate; 6 | private Laptop connectedLaptop; 7 | 8 | public SmartWatch() { 9 | this.avgHeartRate = 75; 10 | this.connectedLaptop = new Laptop(); 11 | } 12 | 13 | private int countHeartRate() { 14 | System.out.println("Counting heart rate"); 15 | return avgHeartRate; 16 | } 17 | 18 | private void sendInfoToLaptop(String data) { 19 | printNotification("Sending data to laptop : " + data); 20 | connectedLaptop.receiveInfo(data); 21 | } 22 | } 23 | -------------------------------------------------------------------------------- /src/main/java/org/hyperskill/samples/serialization/SerializationUtils.java: -------------------------------------------------------------------------------- 1 | package org.hyperskill.samples.serialization; 2 | 3 | import java.io.*; 4 | 5 | public class SerializationUtils { 6 | /** 7 | * Serialize the given object and save it to given file 8 | */ 9 | public static void serialize(Object obj, String fileName) throws IOException { 10 | FileOutputStream fos = new FileOutputStream(fileName); 11 | BufferedOutputStream bos = new BufferedOutputStream(fos); 12 | ObjectOutputStream oos = new ObjectOutputStream(bos); 13 | oos.writeObject(obj); 14 | oos.close(); 15 | } 16 | 17 | /** 18 | * Deserialize to Object from given file 19 | */ 20 | public static Object deserialize(String fileName) throws IOException, ClassNotFoundException { 21 | FileInputStream fis = new FileInputStream(fileName); 22 | BufferedInputStream bis = new BufferedInputStream(fis); 23 | ObjectInputStream ois = new ObjectInputStream(bis); 24 | Object obj = ois.readObject(); 25 | ois.close(); 26 | return obj; 27 | } 28 | } 29 | 30 | -------------------------------------------------------------------------------- /src/main/java/org/hyperskill/samples/serialization/basics/Address.java: -------------------------------------------------------------------------------- 1 | package org.hyperskill.samples.serialization.basics; 2 | 3 | import java.io.Serializable; 4 | 5 | public class Address implements Serializable { 6 | private static final long serialVersionUID = 1L; 7 | private String state; 8 | private String city; 9 | private String street; 10 | 11 | public void setState(String state) { 12 | this.state = state; 13 | } 14 | 15 | public void setCity(String city) { 16 | this.city = city; 17 | } 18 | 19 | public void setStreet(String street) { 20 | this.street = street; 21 | } 22 | 23 | public String getState() { 24 | return state; 25 | } 26 | 27 | public String getCity() { 28 | return city; 29 | } 30 | 31 | public String getStreet() { 32 | return street; 33 | } 34 | 35 | @Override 36 | public String toString() { 37 | return "Address{" + 38 | "state='" + state + '\'' + 39 | ", city='" + city + '\'' + 40 | ", street='" + street + '\'' + 41 | '}'; 42 | } 43 | } -------------------------------------------------------------------------------- /src/main/java/org/hyperskill/samples/serialization/basics/Citizen.java: -------------------------------------------------------------------------------- 1 | package org.hyperskill.samples.serialization.basics; 2 | 3 | import java.io.Serializable; 4 | 5 | public class Citizen implements Serializable { 6 | private static final long serialVersionUID = 1L; 7 | private String name; 8 | private Address address; 9 | private transient String passport; 10 | 11 | public void setName(String name) { 12 | this.name = name; 13 | } 14 | 15 | public void setAddress(Address address) { 16 | this.address = address; 17 | } 18 | 19 | public void setPassport(String passport) { 20 | this.passport = passport; 21 | } 22 | 23 | public static long getSerialVersionUID() { 24 | return serialVersionUID; 25 | } 26 | 27 | public String getName() { 28 | return name; 29 | } 30 | 31 | public Address getAddress() { 32 | return address; 33 | } 34 | 35 | public String getPassport() { 36 | return passport; 37 | } 38 | 39 | @Override 40 | public String toString() { 41 | return "Citizen{" + 42 | "name='" + name + '\'' + 43 | ", passport='" + passport + '\'' + 44 | ", address=" + address + 45 | '}'; 46 | } 47 | } -------------------------------------------------------------------------------- /src/main/java/org/hyperskill/samples/serialization/basics/Main.java: -------------------------------------------------------------------------------- 1 | package org.hyperskill.samples.serialization.basics; 2 | 3 | import org.hyperskill.samples.serialization.SerializationUtils; 4 | 5 | import java.io.IOException; 6 | import java.util.Arrays; 7 | 8 | public class Main { 9 | 10 | public static void main(String[] args) { 11 | String filename = "citizens.data"; 12 | try { 13 | SerializationUtils.serialize(getCitizens(), filename); 14 | Citizen[] citizens = (Citizen[]) SerializationUtils.deserialize(filename); 15 | System.out.println(Arrays.toString(citizens)); 16 | } catch (IOException | ClassNotFoundException e) { 17 | e.printStackTrace(); 18 | } 19 | } 20 | 21 | /** 22 | * It generates citizens of the country 23 | */ 24 | private static Citizen[] getCitizens() { 25 | /* Creating Mark Olson citizen */ 26 | Citizen mark = new Citizen(); 27 | mark.setName("Mark Olson"); 28 | mark.setPassport("503143798"); 29 | 30 | Address markAddress = new Address(); 31 | markAddress.setState("Arkansas"); 32 | markAddress.setCity("Conway"); 33 | markAddress.setStreet("1661 Dawson Drive"); 34 | 35 | mark.setAddress(markAddress); 36 | 37 | /* Creating Anna Flores citizen */ 38 | Citizen anna = new Citizen(); 39 | anna.setName("Anna Flores"); 40 | mark.setPassport("605143321"); 41 | 42 | Address annaAddress = new Address(); 43 | annaAddress.setState("Georgia"); 44 | annaAddress.setCity("Atlanta"); 45 | annaAddress.setStreet("4353 Flint Street"); 46 | 47 | anna.setAddress(annaAddress); 48 | 49 | return new Citizen[]{ mark, anna }; 50 | } 51 | } 52 | -------------------------------------------------------------------------------- /src/main/java/org/hyperskill/samples/swing/components/HelloFrame.java: -------------------------------------------------------------------------------- 1 | package org.hyperskill.samples.swing.components; 2 | 3 | import javax.swing.*; 4 | import java.awt.*; 5 | 6 | public class HelloFrame extends JFrame { 7 | 8 | public HelloFrame() { 9 | super("Hello App"); 10 | setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 11 | setSize(300, 300); 12 | setLocationRelativeTo(null); 13 | 14 | initComponents(); 15 | 16 | setLayout(null); // sets absolute positioning of components 17 | setVisible(true); 18 | } 19 | 20 | private void initComponents() { 21 | JLabel nameLabel = new JLabel("Your Name"); 22 | nameLabel.setBounds(40,20, 100,30); 23 | add(nameLabel); 24 | 25 | JTextField nameTextField = new JTextField(); 26 | nameTextField.setBounds(140,20, 120,30); 27 | add(nameTextField); 28 | 29 | JPanel greenPanel = new JPanel(); 30 | greenPanel.setBounds(40,150,220,70); 31 | greenPanel.setLayout(new BorderLayout()); 32 | greenPanel.setBackground(Color.GREEN); 33 | add(greenPanel); 34 | 35 | JButton acceptButton = new JButton("Accept"); 36 | acceptButton.setBounds(100,70,100,30); 37 | add(acceptButton); 38 | 39 | JLabel helloLabel = new JLabel("Hello"); 40 | helloLabel.setBounds(50,20, 100,30); 41 | helloLabel.setHorizontalAlignment(SwingConstants.CENTER); 42 | helloLabel.setVerticalAlignment(SwingConstants.CENTER); 43 | 44 | Font font = new Font("Courier", Font.BOLD,12); 45 | helloLabel.setFont(font); 46 | helloLabel.setFont(helloLabel.getFont().deriveFont(16f)); 47 | 48 | greenPanel.add(helloLabel); 49 | 50 | acceptButton.addActionListener(e -> { 51 | String helloText = "Hello"; 52 | String name = nameTextField.getText(); 53 | if (name != null && name.trim().length() > 0) { 54 | helloText += String.format(", %s", name); 55 | } 56 | helloLabel.setText(helloText); 57 | }); 58 | } 59 | 60 | public static void main(final String[] args) { 61 | new HelloFrame(); 62 | } 63 | } -------------------------------------------------------------------------------- /src/main/java/org/hyperskill/samples/swing/layouts/BorderLayoutExample.java: -------------------------------------------------------------------------------- 1 | package org.hyperskill.samples.swing.layouts; 2 | 3 | import javax.swing.*; 4 | import java.awt.*; 5 | 6 | public class BorderLayoutExample extends JFrame { 7 | 8 | public BorderLayoutExample() { 9 | super("Border Layout Example"); 10 | 11 | setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 12 | setSize(300, 300); 13 | setLocationRelativeTo(null); 14 | 15 | setLayout(new BorderLayout()); 16 | 17 | add(new JButton("North"), BorderLayout.NORTH); 18 | add(new JButton("East"), BorderLayout.EAST); 19 | add(new JButton("South"), BorderLayout.SOUTH); 20 | add(new JButton("West"), BorderLayout.WEST); 21 | add(new JButton("Center"), BorderLayout.CENTER); 22 | 23 | setVisible(true); 24 | } 25 | 26 | public static void main(final String[] args) { 27 | new BorderLayoutExample(); 28 | } 29 | } 30 | 31 | -------------------------------------------------------------------------------- /src/main/java/org/hyperskill/samples/swing/layouts/BoxLayoutExample.java: -------------------------------------------------------------------------------- 1 | package org.hyperskill.samples.swing.layouts; 2 | 3 | import javax.swing.*; 4 | 5 | public class BoxLayoutExample extends JFrame { 6 | 7 | public BoxLayoutExample() { 8 | super("Box Layout Example"); 9 | 10 | setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 11 | setSize(300, 300); 12 | setLocationRelativeTo(null); 13 | 14 | add(new JButton("First")); 15 | add(new JButton("Second")); 16 | add(new JButton("Third")); 17 | add(new JButton("Fourth")); 18 | add(new JButton("Fifth")); 19 | 20 | setLayout(new BoxLayout(getContentPane(), BoxLayout.Y_AXIS)); 21 | setVisible(true); 22 | } 23 | 24 | public static void main(final String[] args) { 25 | new BoxLayoutExample(); 26 | } 27 | } 28 | -------------------------------------------------------------------------------- /src/main/java/org/hyperskill/samples/swing/layouts/FlowLayoutExample.java: -------------------------------------------------------------------------------- 1 | package org.hyperskill.samples.swing.layouts; 2 | 3 | import javax.swing.*; 4 | import java.awt.*; 5 | 6 | public class FlowLayoutExample extends JFrame { 7 | 8 | public FlowLayoutExample() { 9 | super("Flow Layout Example"); 10 | 11 | setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 12 | setSize(300, 300); 13 | setLocationRelativeTo(null); 14 | 15 | add(new JButton("First")); 16 | add(new JButton("Second")); 17 | add(new JTextField("Enter your text here")); 18 | add(new JLabel("This is a long label")); 19 | add(new JButton("Third")); 20 | 21 | setLayout(new FlowLayout(FlowLayout.LEFT, 20, 10)); 22 | setVisible(true); 23 | } 24 | 25 | public static void main(final String[] args) { 26 | new FlowLayoutExample(); 27 | } 28 | } 29 | -------------------------------------------------------------------------------- /src/main/java/org/hyperskill/samples/swing/layouts/GridLayoutExample.java: -------------------------------------------------------------------------------- 1 | package org.hyperskill.samples.swing.layouts; 2 | 3 | import javax.swing.*; 4 | import java.awt.*; 5 | 6 | public class GridLayoutExample extends JFrame { 7 | 8 | public GridLayoutExample() { 9 | super("Grid Layout Example"); 10 | 11 | setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 12 | setSize(300, 300); 13 | setLocationRelativeTo(null); 14 | 15 | add(new JButton("First")); 16 | add(new JButton("Second")); 17 | add(new JTextField("Enter your text here")); 18 | add(new JLabel("This is a long label")); 19 | add(new JButton("Third")); 20 | add(new JLabel("This is another label")); 21 | 22 | setLayout(new GridLayout(3, 3, 5, 5)); 23 | setVisible(true); 24 | } 25 | 26 | public static void main(final String[] args) { 27 | new GridLayoutExample(); 28 | } 29 | } 30 | 31 | -------------------------------------------------------------------------------- /src/main/java/org/hyperskill/samples/swing/menu/MenuExample.java: -------------------------------------------------------------------------------- 1 | package org.hyperskill.samples.swing.menu; 2 | 3 | import javax.swing.*; 4 | import java.awt.event.KeyEvent; 5 | 6 | public class MenuExample extends JFrame { 7 | 8 | public MenuExample() { 9 | super("Menu Example"); 10 | 11 | setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 12 | setSize(300, 300); 13 | setLocationRelativeTo(null); 14 | 15 | initMenu(); 16 | 17 | setVisible(true); 18 | } 19 | 20 | private void initMenu() { 21 | JMenuBar menuBar = new JMenuBar(); 22 | JMenu fileMenu = new JMenu("File"); 23 | fileMenu.setMnemonic(KeyEvent.VK_F); 24 | 25 | JMenu newMenuItem = new JMenu("New"); 26 | JMenuItem openMenuItem = new JMenuItem("Open"); 27 | JMenuItem closeMenuItem = new JMenuItem("Close"); 28 | JMenuItem closeAllMenuItem = new JMenuItem("Close All"); 29 | JMenuItem exitMenuItem = new JMenuItem("Exit"); 30 | 31 | JMenuItem textFileMenuItem = new JMenuItem("Text File"); 32 | JMenuItem imgFileMenuItem = new JMenuItem("Image File"); 33 | JMenuItem folderMenuItem = new JMenuItem("Folder"); 34 | 35 | exitMenuItem.addActionListener(event -> System.exit(0)); 36 | 37 | newMenuItem.add(textFileMenuItem); 38 | newMenuItem.add(imgFileMenuItem); 39 | newMenuItem.add(folderMenuItem); 40 | 41 | fileMenu.add(newMenuItem); 42 | fileMenu.add(openMenuItem); 43 | fileMenu.add(closeMenuItem); 44 | fileMenu.add(closeAllMenuItem); 45 | 46 | fileMenu.addSeparator(); 47 | fileMenu.add(exitMenuItem); 48 | 49 | menuBar.add(fileMenu); 50 | setJMenuBar(menuBar); 51 | } 52 | 53 | public static void main(final String[] args) { 54 | new MenuExample(); 55 | } 56 | } --------------------------------------------------------------------------------