hallar el tipo de triangulo conociendo sus lados

/*
* Triangulo.java
*
* Created on 23 de abril de 2007, 06:32 PM
*/

/**
*
* @author ALUMNO
*/
public class Triangulo extends javax.swing.JFrame {

/** Creates new form Triangulo */
public Triangulo() {
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.
*/
// //GEN-BEGIN:initComponents
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
jTextPane1 = new javax.swing.JTextPane();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jScrollPane2 = new javax.swing.JScrollPane();
jTextPane2 = new javax.swing.JTextPane();
jScrollPane3 = new javax.swing.JScrollPane();
jTextPane3 = new javax.swing.JTextPane();
jLabel3 = new javax.swing.JLabel();
jLabel4 = new javax.swing.JLabel();
jScrollPane4 = new javax.swing.JScrollPane();
jTextPane4 = new javax.swing.JTextPane();
jButton1 = new javax.swing.JButton();

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jScrollPane1.setViewportView(jTextPane1);

jLabel1.setText("Lado A");

jLabel2.setText("Lado B");

jScrollPane2.setViewportView(jTextPane2);

jScrollPane3.setViewportView(jTextPane3);

jLabel3.setText("Lado C");

jLabel4.setText("Tipo de Tringulo");

jScrollPane4.setViewportView(jTextPane4);

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

org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.add(73, 73, 73)
.add(jLabel4)
.add(24, 24, 24)
.add(jScrollPane4, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 154, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.addContainerGap(73, Short.MAX_VALUE))
.add(layout.createSequentialGroup()
.addContainerGap()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jLabel1)
.add(jLabel2))
.add(13, 13, 13))
.add(layout.createSequentialGroup()
.add(jLabel3)
.add(12, 12, 12)))
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING, false)
.add(org.jdesktop.layout.GroupLayout.LEADING, jScrollPane3)
.add(org.jdesktop.layout.GroupLayout.LEADING, jScrollPane2)
.add(org.jdesktop.layout.GroupLayout.LEADING, jScrollPane1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 93, Short.MAX_VALUE))
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 51, Short.MAX_VALUE)
.add(jButton1)
.add(33, 33, 33))
);
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.addContainerGap()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING)
.add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(jLabel1))
.add(23, 23, 23)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jLabel2)
.add(jScrollPane2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(jButton1))
.add(21, 21, 21)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING)
.add(jLabel3)
.add(jScrollPane3, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
.add(39, 39, 39)
.add(jLabel4))
.add(org.jdesktop.layout.GroupLayout.TRAILING, jScrollPane4, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
.addContainerGap(55, Short.MAX_VALUE))
);
pack();
}// //GEN-END:initComponents

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
// TODO add your handling code here:
double A, B, C;
A = Double.parseDouble(jTextPane1.getText());
B = Double.parseDouble(jTextPane2.getText());
C = Double.parseDouble(jTextPane3.getText());
if((A+B)>C && (B+C)>A && (A+C)>B )
if ((A==B)&&(B==C))
jTextPane4.setText("Triángulo EQUILATERO");
else if((A==B)(B==C)(A==C))
jTextPane4.setText("Triángulo ISOSCELES");
else
jTextPane4.setText("Triángulo ESCALENO");
else
jTextPane4.setText("Triángulo NO EXISTE");
}//GEN-LAST:event_jButton1ActionPerformed

/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Triangulo().setVisible(true);
}
});
}

// 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.JScrollPane jScrollPane2;
private javax.swing.JScrollPane jScrollPane3;
private javax.swing.JScrollPane jScrollPane4;
private javax.swing.JTextPane jTextPane1;
private javax.swing.JTextPane jTextPane2;
private javax.swing.JTextPane jTextPane3;
private javax.swing.JTextPane jTextPane4;
// End of variables declaration//GEN-END:variables

}