Inserimento primi esempi

USocket/.gitignore

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+/build/

USocket/build.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!-- You may freely edit this file. See commented blocks below for -->
+<!-- some examples of how to customize the build. -->
+<!-- (If you delete it and reopen the project it will be recreated.) -->
+<!-- By default, only the Clean and Build commands use this build script. -->
+<!-- Commands such as Run, Debug, and Test only use this build script if -->
+<!-- the Compile on Save feature is turned off for the project. -->
+<!-- You can turn off the Compile on Save (or Deploy on Save) setting -->
+<!-- in the project's Project Properties dialog box.-->
+<project name="USocket" default="default" basedir=".">
+    <description>Builds, tests, and runs the project USocket.</description>
+    <import file="nbproject/build-impl.xml"/>
+    <!--
+
+    There exist several targets which are by default empty and which can be 
+    used for execution of your tasks. These targets are usually executed 
+    before and after some main targets. They are: 
+
+      -pre-init:                 called before initialization of project properties
+      -post-init:                called after initialization of project properties
+      -pre-compile:              called before javac compilation
+      -post-compile:             called after javac compilation
+      -pre-compile-single:       called before javac compilation of single file
+      -post-compile-single:      called after javac compilation of single file
+      -pre-compile-test:         called before javac compilation of JUnit tests
+      -post-compile-test:        called after javac compilation of JUnit tests
+      -pre-compile-test-single:  called before javac compilation of single JUnit test
+      -post-compile-test-single: called after javac compilation of single JUunit test
+      -pre-jar:                  called before JAR building
+      -post-jar:                 called after JAR building
+      -post-clean:               called after cleaning build products
+
+    (Targets beginning with '-' are not intended to be called on their own.)
+
+    Example of inserting an obfuscator after compilation could look like this:
+
+        <target name="-post-compile">
+            <obfuscate>
+                <fileset dir="${build.classes.dir}"/>
+            </obfuscate>
+        </target>
+
+    For list of available properties check the imported 
+    nbproject/build-impl.xml file. 
+
+
+    Another way to customize the build is by overriding existing main targets.
+    The targets of interest are: 
+
+      -init-macrodef-javac:     defines macro for javac compilation
+      -init-macrodef-junit:     defines macro for junit execution
+      -init-macrodef-debug:     defines macro for class debugging
+      -init-macrodef-java:      defines macro for class execution
+      -do-jar:                  JAR building
+      run:                      execution of project 
+      -javadoc-build:           Javadoc generation
+      test-report:              JUnit report generation
+
+    An example of overriding the target for project execution could look like this:
+
+        <target name="run" depends="USocket-impl.jar">
+            <exec dir="bin" executable="launcher.exe">
+                <arg file="${dist.jar}"/>
+            </exec>
+        </target>
+
+    Notice that the overridden target depends on the jar target and not only on 
+    the compile target as the regular run target does. Again, for a list of available 
+    properties which you can use, check the target you are overriding in the
+    nbproject/build-impl.xml file. 
+
+    -->
+</project>

USocket/dist/README.TXT

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+========================
+BUILD OUTPUT DESCRIPTION
+========================
+
+When you build an Java application project that has a main class, the IDE
+automatically copies all of the JAR
+files on the projects classpath to your projects dist/lib folder. The IDE
+also adds each of the JAR files to the Class-Path element in the application
+JAR files manifest file (MANIFEST.MF).
+
+To run the project from the command line, go to the dist folder and
+type the following:
+
+java -jar "USocket.jar" 
+
+To distribute this project, zip up the dist folder (including the lib folder)
+and distribute the ZIP file.
+
+Notes:
+
+* If two JAR files on the project classpath have the same name, only the first
+JAR file is copied to the lib folder.
+* Only JAR files are copied to the lib folder.
+If the classpath contains other types of files or folders, these files (folders)
+are not copied.
+* If a library on the projects classpath also has a Class-Path element
+specified in the manifest,the content of the Class-Path element has to be on
+the projects runtime path.
+* To set a main class in a standard Java project, right-click the project node
+in the Projects window and choose Properties. Then click Run and enter the
+class name in the Main Class field. Alternatively, you can manually type the
+class name in the manifest Main-Class element.

USocket/manifest.mf

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+Manifest-Version: 1.0
+X-COMMENT: Main-Class will be added automatically by build
+

USocket/nbproject/genfiles.properties

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+build.xml.data.CRC32=73e21a97
+build.xml.script.CRC32=905bb893
+build.xml.stylesheet.CRC32=f85dc8f2@1.102.0.48
+# This file is used by a NetBeans-based IDE to track changes in generated files such as build-impl.xml.
+# Do not edit this file. You may delete it but then the IDE will never regenerate such files for you.
+nbproject/build-impl.xml.data.CRC32=73e21a97
+nbproject/build-impl.xml.script.CRC32=04bab3ac
+nbproject/build-impl.xml.stylesheet.CRC32=12e0a6c2@1.102.0.48

USocket/nbproject/private/private.properties

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+compile.on.save=true
+user.properties.file=/home/boss/.netbeans/16/build.properties

USocket/nbproject/private/private.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project-private xmlns="http://www.netbeans.org/ns/project-private/1">
+    <editor-bookmarks xmlns="http://www.netbeans.org/ns/editor-bookmarks/2" lastBookmarkId="0"/>
+    <open-files xmlns="http://www.netbeans.org/ns/projectui-open-files/2">
+        <group>
+            <file>file:/home/boss/Progetti/USocket/src/com/mirimatcode/USocket.java</file>
+        </group>
+    </open-files>
+</project-private>

USocket/nbproject/project.properties

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+annotation.processing.enabled=true
+annotation.processing.enabled.in.editor=false
+annotation.processing.processor.options=
+annotation.processing.processors.list=
+annotation.processing.run.all.processors=true
+annotation.processing.source.output=${build.generated.sources.dir}/ap-source-output
+build.classes.dir=${build.dir}/classes
+build.classes.excludes=**/*.java,**/*.form
+# This directory is removed when the project is cleaned:
+build.dir=build
+build.generated.dir=${build.dir}/generated
+build.generated.sources.dir=${build.dir}/generated-sources
+# Only compile against the classpath explicitly listed here:
+build.sysclasspath=ignore
+build.test.classes.dir=${build.dir}/test/classes
+build.test.results.dir=${build.dir}/test/results
+# Uncomment to specify the preferred debugger connection transport:
+#debug.transport=dt_socket
+debug.classpath=\
+    ${run.classpath}
+debug.modulepath=\
+    ${run.modulepath}
+debug.test.classpath=\
+    ${run.test.classpath}
+debug.test.modulepath=\
+    ${run.test.modulepath}
+# Files in build.classes.dir which should be excluded from distribution jar
+dist.archive.excludes=
+# This directory is removed when the project is cleaned:
+dist.dir=dist
+dist.jar=${dist.dir}/USocket.jar
+dist.javadoc.dir=${dist.dir}/javadoc
+dist.jlink.dir=${dist.dir}/jlink
+dist.jlink.output=${dist.jlink.dir}/USocket
+excludes=
+includes=**
+jar.compress=false
+javac.classpath=
+# Space-separated list of extra javac options
+javac.compilerargs=
+javac.deprecation=false
+javac.external.vm=true
+javac.modulepath=
+javac.processormodulepath=
+javac.processorpath=\
+    ${javac.classpath}
+javac.source=17
+javac.target=17
+javac.test.classpath=\
+    ${javac.classpath}:\
+    ${build.classes.dir}
+javac.test.modulepath=\
+    ${javac.modulepath}
+javac.test.processorpath=\
+    ${javac.test.classpath}
+javadoc.additionalparam=
+javadoc.author=false
+javadoc.encoding=${source.encoding}
+javadoc.html5=false
+javadoc.noindex=false
+javadoc.nonavbar=false
+javadoc.notree=false
+javadoc.private=false
+javadoc.splitindex=true
+javadoc.use=true
+javadoc.version=false
+javadoc.windowtitle=
+# The jlink additional root modules to resolve
+jlink.additionalmodules=
+# The jlink additional command line parameters
+jlink.additionalparam=
+jlink.launcher=true
+jlink.launcher.name=USocket
+main.class=com.mirimatcode.USocket
+manifest.file=manifest.mf
+meta.inf.dir=${src.dir}/META-INF
+mkdist.disabled=false
+platform.active=default_platform
+run.classpath=\
+    ${javac.classpath}:\
+    ${build.classes.dir}
+# Space-separated list of JVM arguments used when running the project.
+# You may also define separate properties like run-sys-prop.name=value instead of -Dname=value.
+# To set system properties for unit tests define test-sys-prop.name=value:
+run.jvmargs=
+run.modulepath=\
+    ${javac.modulepath}
+run.test.classpath=\
+    ${javac.test.classpath}:\
+    ${build.test.classes.dir}
+run.test.modulepath=\
+    ${javac.test.modulepath}
+source.encoding=UTF-8
+src.dir=src
+test.src.dir=test

USocket/nbproject/project.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://www.netbeans.org/ns/project/1">
+    <type>org.netbeans.modules.java.j2seproject</type>
+    <configuration>
+        <data xmlns="http://www.netbeans.org/ns/j2se-project/3">
+            <name>USocket</name>
+            <source-roots>
+                <root id="src.dir"/>
+            </source-roots>
+            <test-roots>
+                <root id="test.src.dir"/>
+            </test-roots>
+        </data>
+    </configuration>
+</project>

USocket/src/com/mirimatcode/USocket.java

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+package com.mirimatcode;
+
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
+import java.io.PrintWriter;
+import java.net.ServerSocket;
+import java.net.Socket;
+import java.net.UnknownHostException;
+
+public class USocket {
+    
+    /*
+        Lato server
+    */
+    
+    /**
+     * Inizializza il Socket lato server e ritorna il Socket lato client una volta ricevuto
+     * @param porta porta di ascolto
+     * @return istanza del client ricevuto
+     * @throws IOException 
+     */
+    private static Socket initServer(int porta) throws IOException {
+        ServerSocket server = new ServerSocket(porta);
+        System.out.println("Server in ascolto");
+        Socket client = server.accept();
+        System.out.println("Ricevuto un pacchetto");
+        server.close();
+        return client;
+    }
+    
+    /**
+     * Mette il Socket lato server in ascolto e ritorna il messaggio una volta ricevuto
+     * @param porta porta di ascolto
+     * @return messaggio ricevuto
+     * @throws IOException 
+     */
+    public static String listenString(int porta) throws IOException {
+        Socket client = initServer(porta);    
+        String messaggio = new BufferedReader(new InputStreamReader(client.getInputStream())).readLine();
+        System.out.println("Ottenuto il messaggio");
+        client.close();
+        return messaggio;
+    }
+    
+    /**
+     * Mette il Socket lato server in ascolto, risponde con un messaggio al mittente e restituisce il messaggio ricevuto
+     * @param porta porta di ascolto
+     * @param risposta messaggio che si vuole trasmettere come risposta
+     * @return messaggio ricevuto
+     * @throws IOException 
+     */
+    public static String listenAndReplyString(int porta, String risposta) throws IOException {
+        Socket client = initServer(porta);
+        String messaggio = new BufferedReader(new InputStreamReader(client.getInputStream())).readLine();
+        
+        String ip = client.getInetAddress().getHostAddress();
+        client.close();
+        System.out.println("Mi appresto a rispondere a " + ip);
+        
+        writeString(ip, porta, risposta);
+
+        return messaggio;
+    }
+    
+    /*
+        Lato Client
+    */
+    
+    /**
+     * Prepara un Socket lato client e trasmette il messaggio all'indirizzo IP specificato
+     * @param ip IP del destinatario del messaggio
+     * @param porta porta del destinatario
+     * @param messaggio messaggio che si vuole trasmettere
+     * @throws UnknownHostException
+     * @throws IOException 
+     */
+    public static void writeString(String ip, int porta, String messaggio) throws UnknownHostException, IOException {
+        Socket client = new Socket(ip, porta);
+        
+        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(client.getOutputStream()));
+        PrintWriter out = new PrintWriter(bw, true);
+        out.println(messaggio);
+        
+        out.close();
+        client.close();
+    }
+    
+    /**
+     * Prepara un Socket lato client, trasmette il messaggio all'indirizzo IP specificato e resta in ascolto di una risposta dal destinatario
+     * @param ip IP del destinatario del messaggio
+     * @param porta porta del destinatario
+     * @param messaggio messaggio che si vuole trasmettere
+     * @return messaggio ricevuto dal destinatario come risposta
+     * @throws UnknownHostException
+     * @throws IOException 
+     */
+    public static String writeAndListenString(String ip, int porta, String messaggio) throws UnknownHostException, IOException {
+        Socket client = new Socket(ip, porta);
+        
+        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(client.getOutputStream()));
+        PrintWriter out = new PrintWriter(bw, true);
+        out.println(messaggio);
+        String testo = listenString(porta);
+        out.close();
+        client.close();
+        
+        return testo;
+    }
+}