En Netbeans se crea un JFrame y en modo diseño se añaden los siguientes componentes:
jButton_Info
jButton_X
jButton_Calcular
jButton_Limpiar
jTextField_PeriodoAhorro
jTextField_Rentabilidad
jTextField_SaldoFinal
jTextField_SaldoInicial
jLabels varios para identificar tipos de datos que hay que añadir en los jTextFields.
jPanels varios para agrupar y facilitar la inserción de los componentes cuando operamos en modo diseño.
Código Java (InteresCompuesto.java)
package interes_c;
import java.text.DecimalFormat;
import javax.swing.JOptionPane;
public class InteresCompuesto extends javax.swing.JFrame {
DecimalFormat f = new DecimalFormat("###, ###. ##");
public InteresCompuesto() {
initComponents();
this.setLocationRelativeTo(null);
}
private void initComponents() { ... *Código generado automaticamente por NetBeans ...}
private void jButton_XActionPerformed(java.awt.event.ActionEvent evt) {
this.dispose();
}
private void jButton_InfoActionPerformed(java.awt.event.ActionEvent evt) {
String msg
= "\n Autor: Censor Cosmico\n"
+ " Versión: 2021 DIC\n"
+ " Fecha de creación: 04-12-2021\n"
+ " http://censorcosmico.blogspot.com.es/\n ";
JOptionPane.showMessageDialog(null, msg, "Info - Interés Compuesto -", JOptionPane.INFORMATION_MESSAGE);
}
private void jButton_LimpiarActionPerformed(java.awt.event.ActionEvent evt) {
jTextField_PeriodoAhorro.setText("");
jTextField_Rentabilidad.setText("");
jTextField_SaldoInicial.setText("");
jTextField_SaldoFinal.setText("?");
}
private void jButton_CalcularActionPerformed(java.awt.event.ActionEvent evt) {
calcular();
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new InteresCompuesto().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton_Calcular;
private javax.swing.JButton jButton_Info;
private javax.swing.JButton jButton_Limpiar;
private javax.swing.JButton jButton_X;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel3;
private javax.swing.JLabel jLabel5;
private javax.swing.JLabel jLabel7;
private javax.swing.JLabel jLabel8;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel10;
private javax.swing.JPanel jPanel2;
private javax.swing.JPanel jPanel3;
private javax.swing.JPanel jPanel6;
private javax.swing.JPanel jPanel7;
private javax.swing.JPanel jPanel8;
private javax.swing.JTextField jTextField_PeriodoAhorro;
private javax.swing.JTextField jTextField_Rentabilidad;
private javax.swing.JTextField jTextField_SaldoFinal;
private javax.swing.JTextField jTextField_SaldoInicial;
// End of variables declaration
private void calcular() {
// Formula interes compuesto: Cn=C0*(1+i)^n
float n = Float.parseFloat(jTextField_PeriodoAhorro.getText());
float c0 = Float.parseFloat(jTextField_SaldoInicial.getText());
float i = Float.parseFloat(jTextField_Rentabilidad.getText()) / 100f;
double cn = c0 * Math.pow((1 + i), n);
jTextField_SaldoFinal.setText("" + f.format(cn));
}
}
Resultado:
*Código generado por Netbeans en modo diseño:
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jLabel1 = new javax.swing.JLabel();
jPanel7 = new javax.swing.JPanel();
jButton_Info = new javax.swing.JButton();
jButton_X = new javax.swing.JButton();
jPanel1 = new javax.swing.JPanel();
jPanel2 = new javax.swing.JPanel();
jTextField_PeriodoAhorro = new javax.swing.JTextField();
jTextField_Rentabilidad = new javax.swing.JTextField();
jPanel3 = new javax.swing.JPanel();
jTextField_SaldoInicial = new javax.swing.JTextField();
jTextField_SaldoFinal = new javax.swing.JTextField();
jPanel8 = new javax.swing.JPanel();
jLabel7 = new javax.swing.JLabel();
jLabel8 = new javax.swing.JLabel();
jPanel10 = new javax.swing.JPanel();
jLabel3 = new javax.swing.JLabel();
jLabel5 = new javax.swing.JLabel();
jPanel6 = new javax.swing.JPanel();
jButton_Limpiar = new javax.swing.JButton();
jButton_Calcular = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
setResizable(false);
jLabel1.setFont(new java.awt.Font("Barlow Condensed Medium", 1, 36)); // NOI18N
jLabel1.setForeground(new java.awt.Color(0, 0, 204));
jLabel1.setText("Interés Compuesto");
jPanel7.setBackground(new java.awt.Color(0, 0, 0));
jPanel7.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));
jPanel7.setLayout(new java.awt.GridLayout(1, 0));
jButton_Info.setFont(new java.awt.Font("Barlow Condensed Medium", 1, 18)); // NOI18N
jButton_Info.setText("Info");
jButton_Info.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton_InfoActionPerformed(evt);
}
});
jPanel7.add(jButton_Info);
jButton_X.setFont(new java.awt.Font("Barlow Condensed Medium", 1, 18)); // NOI18N
jButton_X.setText("X");
jButton_X.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton_XActionPerformed(evt);
}
});
jPanel7.add(jButton_X);
jPanel2.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));
jPanel2.setLayout(new java.awt.GridLayout(1, 0));
jTextField_PeriodoAhorro.setFont(new java.awt.Font("Barlow Condensed Medium", 1, 48)); // NOI18N
jTextField_PeriodoAhorro.setHorizontalAlignment(javax.swing.JTextField.CENTER);
jTextField_PeriodoAhorro.setText("1");
jTextField_PeriodoAhorro.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));
jPanel2.add(jTextField_PeriodoAhorro);
jTextField_Rentabilidad.setFont(new java.awt.Font("Barlow Condensed Medium", 1, 48)); // NOI18N
jTextField_Rentabilidad.setHorizontalAlignment(javax.swing.JTextField.CENTER);
jTextField_Rentabilidad.setText("10");
jTextField_Rentabilidad.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));
jPanel2.add(jTextField_Rentabilidad);
jPanel3.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));
jPanel3.setLayout(new java.awt.GridLayout(1, 0));
jTextField_SaldoInicial.setFont(new java.awt.Font("Barlow Condensed Medium", 1, 48)); // NOI18N
jTextField_SaldoInicial.setHorizontalAlignment(javax.swing.JTextField.CENTER);
jTextField_SaldoInicial.setText("100");
jTextField_SaldoInicial.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));
jPanel3.add(jTextField_SaldoInicial);
jTextField_SaldoFinal.setEditable(false);
jTextField_SaldoFinal.setBackground(new java.awt.Color(255, 255, 204));
jTextField_SaldoFinal.setFont(new java.awt.Font("Barlow Condensed Medium", 1, 48)); // NOI18N
jTextField_SaldoFinal.setHorizontalAlignment(javax.swing.JTextField.CENTER);
jTextField_SaldoFinal.setText("?");
jTextField_SaldoFinal.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));
jPanel3.add(jTextField_SaldoFinal);
jPanel8.setLayout(new java.awt.GridLayout(1, 0));
jLabel7.setFont(new java.awt.Font("Barlow Condensed Medium", 0, 18)); // NOI18N
jLabel7.setText("Periodo de ahorro (años):");
jPanel8.add(jLabel7);
jLabel8.setFont(new java.awt.Font("Barlow Condensed Medium", 0, 18)); // NOI18N
jLabel8.setText("Rentabilidad (%):");
jPanel8.add(jLabel8);
jPanel10.setLayout(new java.awt.GridLayout(1, 0));
jLabel3.setFont(new java.awt.Font("Barlow Condensed Medium", 0, 18)); // NOI18N
jLabel3.setText("Saldo inicial:");
jPanel10.add(jLabel3);
jLabel5.setFont(new java.awt.Font("Barlow Condensed Medium", 0, 18)); // NOI18N
jLabel5.setText("Saldo final:");
jPanel10.add(jLabel5);
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, 498, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jPanel8, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addContainerGap())
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jPanel10, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jPanel3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(8, 8, 8))))
);
jPanel1Layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {jPanel2, jPanel3});
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jPanel8, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, 96, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(jPanel10, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jPanel3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap())
);
jPanel1Layout.linkSize(javax.swing.SwingConstants.VERTICAL, new java.awt.Component[] {jPanel2, jPanel3});
jButton_Limpiar.setFont(new java.awt.Font("Barlow Condensed Medium", 0, 18)); // NOI18N
jButton_Limpiar.setText("Limpiar");
jButton_Limpiar.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton_LimpiarActionPerformed(evt);
}
});
jButton_Calcular.setFont(new java.awt.Font("Barlow Condensed Medium", 0, 18)); // NOI18N
jButton_Calcular.setText("Calcular");
jButton_Calcular.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton_CalcularActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel6Layout = new javax.swing.GroupLayout(jPanel6);
jPanel6.setLayout(jPanel6Layout);
jPanel6Layout.setHorizontalGroup(
jPanel6Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel6Layout.createSequentialGroup()
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jButton_Calcular)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jButton_Limpiar)
.addContainerGap())
);
jPanel6Layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {jButton_Calcular, jButton_Limpiar});
jPanel6Layout.setVerticalGroup(
jPanel6Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel6Layout.createSequentialGroup()
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(jPanel6Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jButton_Calcular)
.addComponent(jButton_Limpiar))
.addContainerGap())
);
jPanel6Layout.linkSize(javax.swing.SwingConstants.VERTICAL, new java.awt.Component[] {jButton_Calcular, jButton_Limpiar});
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(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addGroup(layout.createSequentialGroup()
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 288, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(98, 98, 98)
.addComponent(jPanel7, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jPanel6, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 51, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jPanel7, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(17, 17, 17)
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jPanel6, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
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