/* * FactorsPanel.java * * Created on 1 de septiembre de 2008, 23:33 */ import java.math.*; /** * * @author Sergio */ public class FactorsPanel extends javax.swing.JPanel { /* ------------------------------------------------------------------------- * METODO QUE TRANSFORMA UN NUMERO A FORMATO CIENTIFICO * -----------------------------------------------------------------------*/ public static String sci(String number, int numDec){ String sciNumber = "0"; sciNumber = number.substring(0, 1) + "." + number.substring(1, numDec+1) + " * 10^("+ String.valueOf(number.length()-1) +")"; return sciNumber; }//------------------------------------------------------------------------- /* ------------------------------------------------------------------------- * METODO QUE CALCULA EL FACTORIAL DE UN NUMERO ENTERO * -----------------------------------------------------------------------*/ public static String factorial(int n){ BigInteger nfact = BigInteger.ONE; BigInteger aux; if(n!=0 && n!=1){ for(int i=2; i<=n; i++){ aux = new BigInteger(String.valueOf(i)); nfact = nfact.multiply(aux); } } return nfact.toString(); }//------------------------------------------------------------------------- /* ------------------------------------------------------------------------- * METODO QUE COMPRUEBA SI UN NUMERO DADO ES O NO PRIMO * Para ello utiliza el teorema de Wilson * -----------------------------------------------------------------------*/ public static boolean primaly(int p){ boolean prime; BigInteger factorialParcial = new BigInteger(factorial(p-1)); factorialParcial = factorialParcial.add(BigInteger.ONE); if(factorialParcial.divideAndRemainder (BigInteger.valueOf(p))[1].equals(BigInteger.ZERO)){ prime = true; } else{ prime = false; } return prime; }//------------------------------------------------------------------------- /* ------------------------------------------------------------------------- * METODO QUE AVERIGUA LOS NUMEROS PRIMOS HASTA UNO DADO * -----------------------------------------------------------------------*/ public static void primeSearch(int limit){ System.out.println("Los numeros primos hasta "+limit+" son: "); for(int i=2; i1; i++){ if(primaly(i)){ if(cociente%i==0){ cociente = cociente/i; sol = sol + String.valueOf(i) + " * "; i--; } } } return sol; } //------------------------------------------------------------------------- /** Creates new form FactorsPanel */ public FactorsPanel() { 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") // //GEN-BEGIN:initComponents private void initComponents() { jLabel1 = new javax.swing.JLabel(); jTextField1 = new javax.swing.JTextField(); jLabel2 = new javax.swing.JLabel(); jButton1 = new javax.swing.JButton(); jLabel3 = new javax.swing.JLabel(); jLabel4 = new javax.swing.JLabel(); jScrollPane1 = new javax.swing.JScrollPane(); jTextPane1 = new javax.swing.JTextPane(); setBackground(new java.awt.Color(255, 255, 255)); setBorder(javax.swing.BorderFactory.createTitledBorder(null, "Factorizador de numeros", javax.swing.border.TitledBorder.CENTER, javax.swing.border.TitledBorder.DEFAULT_POSITION, new java.awt.Font("Tahoma", 1, 11), new java.awt.Color(0, 0, 0))); // NOI18N jLabel1.setFont(new java.awt.Font("Tahoma", 1, 11)); jLabel1.setText("Introduce aquí el número que deseas factorizar:"); jLabel2.setText("(NOTA: Tu PC hace los cálculos, cuidado con números grandes)"); jButton1.setText("Factorizar"); jButton1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton1ActionPerformed(evt); } }); jLabel3.setFont(new java.awt.Font("Tahoma", 1, 11)); jLabel3.setText("Solución:"); jLabel4.setText("(NOTA: El tiempo que tarda depende del numero introducido)"); jTextPane1.setEditable(false); jScrollPane1.setViewportView(jTextPane1); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this); this.setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addContainerGap() .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 303, Short.MAX_VALUE) .addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 303, Short.MAX_VALUE) .addComponent(jLabel1) .addComponent(jLabel2) .addComponent(jLabel3) .addComponent(jLabel4) .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 112, javax.swing.GroupLayout.PREFERRED_SIZE)) .addContainerGap()) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addContainerGap() .addComponent(jLabel1) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jLabel2) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) .addComponent(jButton1) .addGap(8, 8, 8) .addComponent(jLabel3) .addGap(4, 4, 4) .addComponent(jLabel4) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 57, javax.swing.GroupLayout.PREFERRED_SIZE) .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) ); }// //GEN-END:initComponents private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed jTextPane1.setText("Realizando cálculos. Espere, por favor."); try{ if(!primaly(Integer.parseInt(jTextField1.getText()))){ jTextPane1.setText(primeFactors (Integer.parseInt(jTextField1.getText()))); } else{ jTextPane1.setText("El número "+ jTextField1.getText()+" es primo."); } } catch(Exception ex){ jTextField1.setText(jTextField1.getText()+" no es un numero valido"); } }//GEN-LAST:event_jButton1ActionPerformed // Variables declaration - do not modify//GEN-BEGIN:variables 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.JScrollPane jScrollPane1; private javax.swing.JTextField jTextField1; private javax.swing.JTextPane jTextPane1; // End of variables declaration//GEN-END:variables }