Crear una Linea en JAVA Netbens "Plano cartesiano"

Crear una Linea en JAVA Netbens "Plano cartesiano"

CODIGO DEL PROGRAMA

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import java.awt.Graphics;
import javax.swing.JPanel;


public class Linea extends javax.swing.JFrame {
public class Dibujo2D extends JPanel{
public Dibujo2D(){

}
@Override
protected void paintComponent(Graphics g){
int x1,x2, y1, y2;
x1=(int)Double.parseDouble(X1.getText());
y1=(int)Double.parseDouble(Y1.getText());
x2=(int)Double.parseDouble(X2.getText());
y2=(int)Double.parseDouble(Y2.getText());
g.drawLine(x1, y1, x2, y2);
}
}
 

    public Linea() {
        initComponents();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                       
    private void initComponents() {

        panel11 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        jButton1 = new javax.swing.JButton();
        X1 = new javax.swing.JTextField();
        X2 = new javax.swing.JTextField();
        Y1 = new javax.swing.JTextField();
        Y2 = new javax.swing.JTextField();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        panel11.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(255, 0, 0)));

        javax.swing.GroupLayout panel11Layout = new javax.swing.GroupLayout(panel11);
        panel11.setLayout(panel11Layout);
        panel11Layout.setHorizontalGroup(
            panel11Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 198, Short.MAX_VALUE)
        );
        panel11Layout.setVerticalGroup(
            panel11Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 188, Short.MAX_VALUE)
        );

        jLabel1.setText("x1");

        jLabel2.setText("x2");

        jLabel3.setText("y1");

        jLabel4.setText("y2");

        jButton1.setText("Dibuja");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        X2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                X2ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(panel11, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jLabel1)
                            .addComponent(jLabel3))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                            .addComponent(X1, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(Y1, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(layout.createSequentialGroup()
                                .addComponent(jLabel4)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                .addComponent(Y2))
                            .addGroup(layout.createSequentialGroup()
                                .addComponent(jLabel2)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                .addComponent(X2))))
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                        .addGap(0, 41, Short.MAX_VALUE)
                        .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 91, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(30, 30, 30)))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(panel11, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(32, 32, 32)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jLabel1)
                            .addComponent(jLabel2)
                            .addComponent(X1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(X2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGap(45, 45, 45)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jLabel3)
                            .addComponent(jLabel4)
                            .addComponent(Y1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(Y2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGap(41, 41, 41)
                        .addComponent(jButton1)))
                .addContainerGap(29, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                     

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                       
        dibujar();// TODO add your handling code here:
    }                                     

    private void X2ActionPerformed(java.awt.event.ActionEvent evt) {                                 
        // TODO add your handling code here:
    }                               

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(Linea.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(Linea.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(Linea.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(Linea.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Linea().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                   
    private javax.swing.JTextField X1;
    private javax.swing.JTextField X2;
    private javax.swing.JTextField Y1;
    private javax.swing.JTextField Y2;
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JPanel panel11;
    // End of variables declaration                 
private void dibujar(){
Linea.Dibujo2D dibuj=new Linea.Dibujo2D() ;
dibuj.setBounds(50,100,1000,1000);
dibuj.setOpaque(false);
panel11.add(dibuj);
panel11.repaint();
}
}

Ecuación de segundo grado

Pedir los coeficientes de una ecuación se 2º grado, y muestre sus soluciones . Si no existen indicarlo.

formulas:

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class JavaApplication1 {




    public static void main(String[] args) throws IOException {
     
        double a2,b2, d,x1 = 0,x2;
     
       System.out.println("Introduzaca primer coheficiente a:");
       System.out.println("Introduzaca primer coheficiente b:");
       System.out.println("Introduzaca primer coheficiente c:");
     
        BufferedReader Entrada = new BufferedReader(new InputStreamReader(System.in));
     
       String a=Entrada.readLine();
        a2=Double.parseDouble(a);
     
        String b=Entrada.readLine();
        b2 = Double.parseDouble(b);
     
        String c=Entrada.readLine();
        double c2 = Double.parseDouble(c);
     
     
       
      // calculamos el determinante
 d=((b2*b2)-4*a2*c2);
 if(d<0)
 System.out.println("No existen soluciones reales");

 else
 // queda confirmar que a sea distinto de 0.
// si a=0 nos encontramos una división por cero.

 x1=(-b2+Math.sqrt(d))/(2*a2);
  x2=(-b2 - Math.sqrt(d))/(2* a2);

    System.out.println(  "Solución: "+ x1);
 System.out.println("Solución: " + x2);


    }
   }
-------------------------------------------------------------------------------------------------------------------
run:
Introduzaca primer coheficiente a:
Introduzaca primer coheficiente b:
Introduzaca primer coheficiente c:
2
5
3
Solución: -1.0
Solución: -1.5
BUILD SUCCESSFUL (total time: 11 seconds)

Lógica sucesión de números

Dada la siguiente sucesión de números: 2, 4, 8, 6, 36, 72, 70, 4900, 9800,... mediante el uso de funciones, mostrar en pantalla los términos de esta serie y calcular la suma de N (N se indica por teclado) elementos, es decir, SUMA=2+4+8+6+.....
EXPLICACION DEL PROGRAMA: El programa calcula la suma de la serie anterior para n terminos. Para ello, genera cada uno de los valores de dicha serie hasta el limite ingresado por el usuario. La logica que sigue la serie es de elevar al cuadrado, multiplicar por dos y restar dos.
😐😉

import java.io.*;

public class a9 {
public static void main(String args[])throws IOException {
BufferedReader in; int s=0,a=2;
in=new BufferedReader(new InputStreamReader(System.in));
System.out.println("Introduzca el limite N");
int n=Integer.parseInt(in.readLine());
for(int i=0;i<n;) {
 System.out.println(a);
 s=s+a; i++; a=op1(a);
 if(i==n)
break;
 else {
System.out.println(a);
 s=s+a;
a=op2(a); i++;
 }
 if(i==n) break;
else {
System.out.println(a);
 s=s+a;
 a=op3(a); i++; }
 }
 System.out.println("La suma de la serie es: "+s);
}
 public static int op1 (int b) {
return b*b;
}
public static int op2 (int b) {
return b*2;
}
 public static int op3 (int b) {
return b-2;}
}

--------------------Configuration: <Default>--------------------
Introduzca el limite N
4
2
4
8
6
La suma de la serie es: 20

Process completed.