first commit

practica8_1/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-17">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

practica8_1/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>practica8_1</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

practica8_1/.settings/org.eclipse.core.resources.prefs

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+eclipse.preferences.version=1
+encoding/<project>=UTF-8

practica8_1/.settings/org.eclipse.jdt.core.prefs

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+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=17
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=17

practica8_1/README.md

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+En este programa crearemos 3 personas y mostraremos sus edades y sus nombres mediante los metodos writeObject() y readObject() y los guardaremos en un archivo.
+
+``` [ID = 1, Nombre = Paquito, Edad = 36, ID = 2, Nombre = Pedro, Edad = 88, ID = 3, Nombre = Juanjo, Edad = 59] ```

practica8_1/src/practica8_1/Gente.java

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+package practica8_1;
+
+import java.io.Serial;
+import java.io.Serializable;
+import java.util.ArrayList;
+
+public class Gente implements Serializable{
+	 
+	@Serial
+	    private static final long serialVersionUID = 1L;
+	    private ArrayList<Persona> datos ;
+
+	    public Gente() {
+	        datos = new ArrayList<>();
+	    }
+
+	    public boolean add(Persona p){
+	        datos.add(p);
+	        return true;
+	    }
+
+	    public boolean remove(Persona p){
+	        datos.remove(p);
+	        return true;
+	    }
+
+	    public ArrayList<Persona> getData() {
+	        return datos;
+	    }
+
+	    @Override
+	    public String toString() {
+	        return datos.toString();
+	    }
+}

practica8_1/src/practica8_1/Main.java

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+package practica8_1;
+
+import java.io.File;
+
+public class Main {
+
+	public static void main(String[] args) {
+		File file = new File("Persona.bin");
+        Gente data = new Gente();
+        data.add(new Persona("Paquito", 36 ));
+        data.add(new Persona("Pedro", 88));
+        data.add(new Persona("Juanjo", 59));
+        
+        boolean isWritten = ObjWriter.write(data,file);
+        
+        Gente g = null;
+        
+        if (isWritten) {
+            g = (Gente) ObjReader.read(file);
+            System.out.println(g.toString());
+        }
+
+
+    }
+
+}

practica8_1/src/practica8_1/ObjReader.java

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+package practica8_1;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+
+public class ObjReader {
+	 
+	public static Object read(File file) {
+	        Object result = null;
+	        try (FileInputStream fis = new FileInputStream(file);
+	             ObjectInputStream ois = new ObjectInputStream(fis)
+	        ){
+	            result = ois.readObject();
+	        } catch (IOException | ClassNotFoundException e) {
+	            throw new RuntimeException(e);
+	        }
+	        return result;
+	    }
+}

practica8_1/src/practica8_1/ObjWriter.java

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+package practica8_1;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.ObjectOutputStream;
+
+public class ObjWriter {
+    
+	public static boolean write(Object obj, File out) {
+        try (FileOutputStream fos = new FileOutputStream(out);
+             ObjectOutputStream oos = new ObjectOutputStream(fos)
+        ){
+            oos.writeObject(obj);
+            oos.flush();
+            return true;
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

practica8_1/src/practica8_1/Persona.java

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+package practica8_1;
+
+import java.io.Serializable;
+
+public class Persona implements Serializable{
+	
+	private int id ;
+	private String nombre;
+	private int edad;
+	private static int CONT = 0;
+
+    public Persona(String nombre, int edad) {
+        id = ++CONT;
+        this.nombre = nombre;
+        this.edad = edad;
+    }
+
+    public int getAge() {
+        return edad;
+    }
+
+    public void setAge(int age) {
+        this.edad = edad;
+    }
+    
+    public String getName() {
+        return nombre;
+    }
+
+    public void setName(String name) {
+        this.nombre = nombre;
+    }
+
+    @Override
+    public String toString() {
+        return "ID = " + id + ", Nombre = " + nombre + ", Edad = " + edad+"";
+    }
+}