private void btnHItungActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
int angka1,angka2,hasil;
angka1=Integer.parseInt(txt1.getText());
angka2=Integer.parseInt(txt2.getText());
hasil=angka1 + angka2;
txt3.setText(String.valueOf(hasil)); }
private void btnHapusActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
txt1.setText("");
txt2.setText("");
txt3.setText(""); }
private void btnLagiActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
txt1.setText("");
txt2.setText("");
txt3.setText("");
txt1.requestFocus(); }
private void btnKeluarActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
System.exit(1); }
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