Mengenal cara mendeklarasikan variabel dan mengkonvensi variabel

Form Aritmatika 

CODE PROGRAMNYA :


"C" :

private void bCActionPerformed(java.awt.event.ActionEvent evt) {                                  
        // TODO add your handling code here:
        ebil1.setText("");
        ebil2.setText("");
        eHasil.setText("");
        ebil1.requestFocus();
    }                                 


"MAX" :    

private void bMaxActionPerformed(java.awt.event.ActionEvent evt) {                                    
        // TODO add your handling code here:
        int a,b;
        a=Integer.parseInt(ebil1.getText());
        b=Integer.parseInt(ebil2.getText());
        if (a>b){
            eHasil.setText(Integer.toString(a));
        }
        else{
            eHasil.setText(Integer.toString(b));
        }
    }                                   

"MIN" :

    private void bMinActionPerformed(java.awt.event.ActionEvent evt) {                                    
        // TODO add your handling code here:
        int a,b;
        a=Integer.parseInt(ebil1.getText());
        b=Integer.parseInt(ebil2.getText());
        if (a<b){
            eHasil.setText(Integer.toString(a));
        }
        else{
            eHasil.setText(Integer.toString(b));}
    }   

                               
"EXIT" :

    private void bExitActionPerformed(java.awt.event.ActionEvent evt) {                                     
        // TODO add your handling code here:
        dispose();
    }                
                   

Operator "+" :

    private void bpActionPerformed(java.awt.event.ActionEvent evt) {                                  
        // TODO add your handling code here:
        int a, b, c;
        a=Integer.parseInt(ebil1.getText());
        b=Integer.parseInt(ebil2.getText());
        c=a+b;
        eHasil.setText(Integer.toString(c));
    }                                 

Operator " - " :

    private void bmActionPerformed(java.awt.event.ActionEvent evt) {                                  
        // TODO add your handling code here:
        int a, b, c;
        a=Integer.parseInt(ebil1.getText());
        b=Integer.parseInt(ebil2.getText());
        c=a-b;
        eHasil.setText(Integer.toString(c));
    }               
                 
Operator " / " :

    private void bbActionPerformed(java.awt.event.ActionEvent evt) {                                  
        // TODO add your handling code here:
        int a, b, c;
        a=Integer.parseInt(ebil1.getText());
        b=Integer.parseInt(ebil2.getText());
        c=a/b;
        eHasil.setText(Integer.toString(c));
    }                                 

Operator " * " :

    private void bkActionPerformed(java.awt.event.ActionEvent evt) {                                  
        // TODO add your handling code here:
        int a, b, c;
        a=Integer.parseInt(ebil1.getText());
        b=Integer.parseInt(ebil2.getText());
        c=a*b;
        eHasil.setText(Integer.toString(c));
    }                                 

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Mengenal Label, Textfield dan Button pada NetBeans

Form mahasiswa yang menampilkan NIM, NAMA, ALAMAT dan NO TELP

Kode Program

CLEAR :

 private void bCLEARActionPerformed(java.awt.event.ActionEvent evt) {                                     
        // TODO add your handling code here:
        eNIM.setText("");
        eNAMA.setText("");
        ealamat.setText("");
        eno.setText("");
    }             

EXIT:

private void bEXITActionPerformed(java.awt.event.ActionEvent evt) {                                     
        // TODO add your handling code here:
        dispose();

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Form yang menampilkan pesan di aplikasi NetBeans

Kode Programnya 

 private void
bTampilActionPerformed(java.awt.event.ActionEvent evt) {
 // TODO add your handling code here: JOptionPane.showMessageDialog(null,"Selamat Mencoba Ide NetBeans\n Eni Nuraeni" , "Login", JOptionPane.INFORMATION_MESSAGE); }

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