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Manejar eventos en AWT Clase con acciones import java.awt.Button; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class Acciones implements ActionListener { public void actionPerformed(ActionEvent ev) { if(((Button)ev.getSource()).getLabel().equals("Aceptar")) System.out.println("Has pulsado Aceptar."); else System.out.println("Has pulsado Cancelar."); } }
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Realizar una suma mediante una interfaz que contiene los métodos que se ejecutarán de forma remota
Interfaz remota Servidor que implementa la clase de objetos remotos Cliente que utiliza objetos remotos Interfaz remota Interfaz Java que contiene los métodos que se ejecutarán de forma remota. import java.rmi.Remote; import java.rmi.RemoteException; public interface RMICalcInterface extends Remote { public int suma(int a, int b) throws RemoteException; } Servidor Servidor que implementa la clase…
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Serializar y deserializar un objeto almacenado en un fichero en Java
Clase Persona
public class Persona implements java.io.Serializable { String nombre; public Persona(String parametro) { nombre = parametro; } @Override public String toString() { return "Nombre: " + nombre; } }
Serializar
import java.io.*; public class Serializar { public static void main(String[] args) { try { FileOutputStream fos = new…
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Serializar y deserializar contenido en un fichero en Java
Serializar
Serializar significa transformar un objeto en una secuencia de bytes para escribirlo en un stream.
import java.io.*; import java.util.Date; public class Serializar { public static void main(String[] args) { try { FileOutputStream fos = new FileOutputStream("fichero.txt"); ObjectOutputStream sos = new ObjectOutputStream(fos); sos.writeObject("Fecha actual"); sos.writeObject(new Date());…
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Obtener la posición del ratón en la pantalla con Java
import java.awt.MouseInfo; import java.awt.Robot; import java.awt.event.InputEvent; public class Robots { public static void main(String[] args) throws Exception { System.out.println("(" + MouseInfo.getPointerInfo().getLocation().x + ", " + MouseInfo.getPointerInfo().getLocation().y + ")"); } }
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Free to watch • No registration required • HD streaming
Ver la resolución de pantalla con Java
import java.awt.Robot; import java.awt.event.InputEvent; import java.awt.*; public class Robots { public static void main(String[] args) throws Exception { GraphicsDevice gd = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice(); System.out.println("(" + gd.getDisplayMode().getWidth() + " x " + gd.getDisplayMode().getHeight() + ")"); } }
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Detectar el color de un píxel de la pantalla con Java
import java.awt.Color; import java.awt.Robot; public class Robots { public static void main(String[] args) throws Exception { Color color = (new Robot()).getPixelColor(10, 10); System.out.println("Red = " + color.getRed()); System.out.println("Green = " + color.getGreen()); System.out.println("Blue = " + color.getBlue()); } }
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Javaのログ出力
int iNum = 418;
System.out.println(”hoge”); // hoge
System.out.println(iNum); // 418
System.out.println(iNum + ”- I'm a tea pot”); // “418 - I'm a tea pot”
