Dibujo de un triángulo recto

Este código muestra el dibujo de un triángulo con un lado recto

import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class trianguloRecto extends JFrame implements ActionListener{

JButton boton;
JPanel panel;


public static void main(String[] args) {

trianguloRecto marco = new trianguloRecto();
marco.setSize(250, 350);
marco.setTitle("Dibuja rectangulo recto");
marco.dibujaGUI();
marco.setLocationRelativeTo(null);
marco.setVisible(true);
}


public void dibujaGUI() {

setDefaultCloseOperation(EXIT_ON_CLOSE);
Container ventana = getContentPane();

ventana.setLayout(new FlowLayout());

panel = new JPanel();
panel.setPreferredSize(new Dimension(230,280));
panel.setBackground(Color.white);
ventana.add(panel);
boton = new JButton("Haz click");
ventana.add(boton);
boton.addActionListener(this);

}

public void actionPerformed(ActionEvent evento) {

Graphics papel = panel.getGraphics();
papel.drawLine(10, 100, 10, 10);
papel.drawLine(100, 100, 10, 100);
papel.drawLine(10, 10, 100, 100);

}

}

Cuadrado con lineas

Este código dibuja un cuadrado, utilizando solo líneas

import java.awt.Color;

import java.awt.Container;

import java.awt.Dimension;

import java.awt.FlowLayout;

import java.awt.Graphics;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

@SuppressWarnings("serial")

public class dibujaCuadrado2 extends JFrame implements ActionListener{

JButton boton;

JPanel panel;

public static void main(String[] args) {

dibujaCuadrado2 marco = new dibujaCuadrado2();

marco.setSize(250, 350);

marco.setTitle("Dibuja rectangulo");

marco.dibujaGUI();

marco.setLocationRelativeTo(null);

marco.setVisible(true);

}

public void dibujaGUI() {

setDefaultCloseOperation(EXIT_ON_CLOSE);

Container ventana = getContentPane();

ventana.setLayout(new FlowLayout());

panel = new JPanel();

panel.setPreferredSize(new Dimension(230,280));

panel.setBackground(Color.white);

ventana.add(panel);

boton = new JButton("Haz click");

ventana.add(boton);

boton.addActionListener(this);

}

public void actionPerformed(ActionEvent evento) {

Graphics papel = panel.getGraphics();

papel.drawLine(10, 10, 100, 10);

papel.drawLine(100, 10, 100, 100);

papel.drawLine(100, 100, 10, 100);

papel.drawLine(10, 100, 10, 10);

//papel.setColor(Color.green);

}

}

Cuadrado de 100x100 pixeles

Codigo para mostrar un cuadrado de 100x100 pixeles empezando en la coordenada 10,10

import java.awt.Color;

import java.awt.Container;

import java.awt.Dimension;

import java.awt.FlowLayout;

import java.awt.Graphics;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

@SuppressWarnings("serial")

public class dibujaCuadrado extends JFrame implements ActionListener{

JButton boton;

JPanel panel;

public static void main(String[] args) {

dibujaCuadrado marco = new dibujaCuadrado();

marco.setSize(250, 350);

marco.setTitle("Dibuja rectangulo");

marco.dibujaGUI();

marco.setLocationRelativeTo(null);

marco.setVisible(true);

}

public void dibujaGUI() {

setDefaultCloseOperation(EXIT_ON_CLOSE);

Container ventana = getContentPane();

ventana.setLayout(new FlowLayout());

panel = new JPanel();

panel.setPreferredSize(new Dimension(230,280));

panel.setBackground(Color.white);

ventana.add(panel);

boton = new JButton("Haz click");

ventana.add(boton);

boton.addActionListener(this);

}

public void actionPerformed(ActionEvent evento) {

Graphics papel = panel.getGraphics();

papel.drawRect(10, 10, 100, 100);

papel.setColor(Color.cyan);

papel.fillRect(10, 10, 100, 100);

}

}

Tablero del juego del Gato

Este muestra el tablero del gato

import java.awt.Color;

import java.awt.Container;

import java.awt.Dimension;

import java.awt.FlowLayout;

import java.awt.Graphics;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

@SuppressWarnings("serial")

public class gatoTablero extends JFrame implements ActionListener {

JButton boton;

JPanel panel;

public static void main(String[] args) {

gatoTablero marco = new gatoTablero();

marco.setSize(250, 350);

marco.setTitle("Tablero del gato");

marco.dibujaGUI();

marco.setLocationRelativeTo(null);

marco.setVisible(true);

}

public void dibujaGUI() {

setDefaultCloseOperation(EXIT_ON_CLOSE);

Container ventana = getContentPane();

ventana.setLayout(new FlowLayout());

panel = new JPanel();

panel.setPreferredSize(new Dimension(230, 280));

panel.setBackground(Color.white);

ventana.add(panel);

boton = new JButton("Haz click");

ventana.add(boton);

boton.addActionListener(this);

}

public void actionPerformed(ActionEvent evento) {

Graphics papel = panel.getGraphics();

papel.drawLine(50, 100, 50, 10);

papel.drawLine(100, 100, 100, 10);

papel.drawLine(10, 40, 140, 40);

papel.drawLine(10, 70, 140, 70);

}

}

Paleta de Colores

Dejo el código necesario para mostrar en pantalla, un conjunto de cuadros con distintos colores

import java.awt.Color;

import java.awt.Container;

import java.awt.Dimension;

import java.awt.FlowLayout;

import java.awt.Graphics;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

@SuppressWarnings("serial")

public class paletaColores extends JFrame implements ActionListener{

JButton boton;

JPanel panel;

public static void main(String[] args) {

paletaColores marco = new paletaColores();

marco.setSize(220, 400);

marco.setTitle("Tablero del gato");

marco.dibujaGUI();

marco.setLocationRelativeTo(null);

marco.setVisible(true);

}

public void dibujaGUI() {

setDefaultCloseOperation(EXIT_ON_CLOSE);

Container ventana = getContentPane();

ventana.setLayout(new FlowLayout());

panel = new JPanel();

panel.setPreferredSize(new Dimension(220,320));

panel.setBackground(Color.white);

ventana.add(panel);

boton = new JButton("Haz click");

ventana.add(boton);

boton.addActionListener(this);

}

public void actionPerformed(ActionEvent evento) {

Graphics papel = panel.getGraphics();

papel.drawRect(20, 20, 40, 40);

papel.setColor(Color.black);

papel.fillRect(20, 20, 40, 40);

papel.drawRect(80, 20, 40, 40);

papel.setColor(Color.blue);

papel.fillRect(80, 20, 40, 40);

papel.drawRect(140, 20, 40, 40);

papel.setColor(Color.cyan);

papel.fillRect(140, 20, 40, 40);

papel.drawRect(20, 80, 40, 40);

papel.setColor(Color.DARK_GRAY);

papel.fillRect(20, 80, 40, 40);

papel.drawRect(80, 80, 40, 40);

papel.setColor(Color.gray);

papel.fillRect(80, 80, 40, 40);

papel.drawRect(140, 80, 40, 40);

papel.setColor(Color.green);

papel.fillRect(140, 80, 40, 40);

papel.drawRect(20, 140, 40, 40);

papel.setColor(Color.LIGHT_GRAY);

papel.fillRect(20, 140, 40, 40);

papel.drawRect(80, 140, 40, 40);

papel.setColor(Color.magenta);

papel.fillRect(80, 140, 40, 40);

papel.drawRect(140, 140, 40, 40);

papel.setColor(Color.orange);

papel.fillRect(140, 140, 40, 40);

papel.drawRect(20, 200, 40, 40);

papel.setColor(Color.pink);

papel.fillRect(20, 200, 40, 40);

papel.drawRect(80, 200, 40, 40);

papel.setColor(Color.red);

papel.fillRect(80, 200, 40, 40);

papel.drawRect(140, 200, 40, 40);

papel.setColor(Color.white);

papel.fillRect(140, 200, 40, 40);

papel.drawRect(10, 260, 40, 40);

papel.setColor(Color.yellow);

papel.fillRect(20, 260, 40, 40);

}

}