KALKULATOR SEDERHANA

kode program

        jLabel1.setText("KALKULATOR SEDERHANA");

        jLabel2.setText("ANGKA 1");

        jLabel3.setText("ANGKA 2");

        jTextField2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField2ActionPerformed(evt);
            }
        });

        jLabel4.setText("HASIL");

        jLabel5.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        jLabel5.setBorder(javax.swing.BorderFactory.createLineBorder(new       java.awt.Color(0, 0, 0)));

        jButton1.setText("KALI");
        jButton1.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jButton1MouseClicked(evt);
            }
        });
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        jButton2.setText("BAGI");
        jButton2.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jButton2MouseClicked(evt);
            }
        });

        jButton3.setText("TAMBAH");
        jButton3.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jButton3MouseClicked(evt);
            }
        });
        jButton3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton3ActionPerformed(evt);
            }
        });

        jButton4.setText("KURANG");
        jButton4.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jButton4MouseClicked(evt);
            }
        });

Kode KALI

private void jButton1MouseClicked(java.awt.event.MouseEvent evt) {                                    
        double nilai1;
        double nilai2;
        double nilai3;
        String hasil;
      
        nilai1=Double.parseDouble(jTextField1.getText());
        nilai2=Double.parseDouble(jTextField2.getText());
        nilai3=nilai1*nilai2;
        hasil=String.valueOf(nilai3);
        jLabel5.setText(hasil);
    }  

Kode BAGI                                 
    private void jButton2MouseClicked(java.awt.event.MouseEvent evt) {                                    
       double nilai1;
        double nilai2;
        double nilai3;
        String hasil;
      
        nilai1=Double.parseDouble(jTextField1.getText());
        nilai2=Double.parseDouble(jTextField2.getText());
        nilai3=nilai1/nilai2;
        hasil=String.valueOf(nilai3);
        jLabel5.setText(hasil);
    }   

  

Kode TAMBAH                              
    private void jButton3MouseClicked(java.awt.event.MouseEvent evt) {                                    
        double nilai1;
        double nilai2;
        double nilai3;
        String hasil;
      
        nilai1=Double.parseDouble(jTextField1.getText());
        nilai2=Double.parseDouble(jTextField2.getText());
        nilai3=nilai1+nilai2;
        hasil=String.valueOf(nilai3);
        jLabel5.setText(hasil);
    }  

  

Kode KURANG                               
    private void jButton4MouseClicked(java.awt.event.MouseEvent evt) {                                    
        double nilai1;
        double nilai2;
        double nilai3;
        String hasil;
      
        nilai1=Double.parseDouble(jTextField1.getText());
        nilai2=Double.parseDouble(jTextField2.getText());
        nilai3=nilai1-nilai2;
        hasil=String.valueOf(nilai3);
        jLabel5.setText(hasil);
    }         

                          
 Output: