PROGRAM REKAP NILAI MAHASISWA - NETBEANS

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                                 // TODO add your handling code here:         String Nim, Nama, Prodi, Matakuliah1Pia, Matakuliah2Pia;         Double ratarataPia, NilaiAkhir1Pia, NilaiAkhir2Pia, Kehadiran1Pia, Tugas1Pia, Quis1Pia, UTS1Pia, UAS1Pia;         //double nilaiakhirpia                 Kehadiran1Pia=Double.valueOf(txtKehadiran1Pia.getText());         Tugas1Pia=Double.valueOf(txtTugas1Pia.getText());         Quis1Pia=Double.valueOf(txtQuis1Pia.getText());         UTS1Pia=Double.valueOf(txtUts1Pia.getText());         UAS1Pia=Double.valueOf(txtUas1Pia.getText());         NilaiAkhir1Pia=((0.1*Kehadiran1Pia)+(0.15*Tugas1Pia)+(0.15*Quis1Pia)+(0.25*UTS1Pia)+(0.35*UAS1Pia));         txtAkhir1Pia.setText(Double.toString(NilaiAkhir1Pia));     }                                              private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                                 // TODO add your handling code here:         Double Matakuliah2Pia, NilaiAkhir2Pia, Kehadiran2Pia, Tugas2Pia, Quis2Pia, UTS2Pia, UAS2Pia;         //double nilaiakhirpia                  Kehadiran2Pia=Double.valueOf(txtKehadiran2Pia.getText());         Tugas2Pia=Double.valueOf(txtTugas2Pia.getText());         Quis2Pia=Double.valueOf(txtQuis2Pia.getText());         UTS2Pia=Double.valueOf(txtUts2Pia.getText());         UAS2Pia=Double.valueOf(txtUas2Pia.getText());         NilaiAkhir2Pia=((0.1*Kehadiran2Pia)+(0.15*Tugas2Pia)+(0.15*Quis2Pia)+(0.25*UTS2Pia)+(0.35*UAS2Pia));         txtAkhir2Pia.setText(Double.toString(NilaiAkhir2Pia));     }                                              private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {                                                 // TODO add your handling code here:         String NimPia, NamaPia, ProdiPia, Matakuliah1Pia,         NilaiMatakuliah1Pia, NilaiMatakuliah2Pia, Matakuliah2Pia;         Double RataRataPia, Akhir1Pia, Akhir2Pia;                 NimPia=txtNimPia.getText();         NamaPia=txtNamaPia.getText();         ProdiPia=txtProdiPia.getText();         Matakuliah1Pia=txtMatakuliah1Pia.getText();         Matakuliah2Pia=txtMatakuliah2Pia.getText();         Akhir1Pia=Double.valueOf(txtAkhir1Pia.getText());         Akhir2Pia=Double.valueOf(txtAkhir2Pia.getText());                 Nim.setText(NimPia);         Nama.setText(NamaPia);         Prodi.setText(ProdiPia);         NamaMatakuliah1.setText(Matakuliah1Pia);         NamaMatakuliah2.setText(Matakuliah2Pia);         Nilai1Pia.setText(Double.toString(Akhir1Pia));         Nilai2Pia.setText(Double.toString(Akhir2Pia));                 RataRataPia=(Akhir1Pia+Akhir2Pia)/2;         rataratapia.setText(Double.toString(RataRataPia));     }                                              private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {                                                 // TODO add your handling code here:         txtNimPia.setText("");         txtNamaPia.setText("");         txtProdiPia.setText("");         txtMatakuliah1Pia.setText("");         txtMatakuliah2Pia.setText("");         txtKehadiran1Pia.setText("");         txtKehadiran2Pia.setText("");         txtTugas1Pia.setText("");         txtTugas2Pia.setText("");         txtAkhir1Pia.setText("");         txtAkhir2Pia.setText("");         txtQuis1Pia.setText("");         txtQuis2Pia.setText("");         txtUts1Pia.setText("");         txtUts2Pia.setText("");         txtUas1Pia.setText("");         txtUas2Pia.setText("");     }