import javax.swing.JOptionPane;
private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {
jTextField2.requestFocus();
}
private void jTextField2ActionPerformed(java.awt.event.ActionEvent evt) {
jTextField3.requestFocus();
}
private void jTextField3ActionPerformed(java.awt.event.ActionEvent evt) {
try{
int ilksayi=Integer.parseInt(jTextField1.getText());
int sonsayi=Integer.parseInt(jTextField2.getText());
int artismiktari=Integer.parseInt(jTextField3.getText());
int a=ilksayi;
int toplam=0;
while(a<=sonsayi){
toplam=toplam+a;
a=a+artismiktari;
}
jLabel4.setText("Toplam="+toplam);
jTextField1.setText("");
jTextField2.setText("");
jTextField3.setText("");
jTextField1.requestFocus();
}
catch(Exception e){
JOptionPane.showMessageDialog(null,"hatalı girdiniz");
}
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
try{
int ilksayi=Integer.parseInt(jTextField1.getText());
int sonsayi=Integer.parseInt(jTextField2.getText());
int artismiktari=Integer.parseInt(jTextField3.getText());
int a=ilksayi;
int toplam=0;
while(a<=sonsayi){
toplam=toplam+a;
a=a+artismiktari;
}
jLabel4.setText("Toplam="+toplam);
jTextField1.setText("");
jTextField2.setText("");
jTextField3.setText("");
jTextField1.requestFocus();
}
catch(Exception e){
JOptionPane.showMessageDialog(null,"hatalı girdiniz");
}
}
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