main method netbeans

Есть JFrame в котором выполняются действия по нажатию JButton. Пишу код в строке обработчика события , но сам проект не запускается, т.к. не объявлен main method. Объявив в начале

public static void main(String[] args){

Выбивает кучу ошибок и не компилирует программу. Вот как я пытаюсь решить задачу:

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
try { 
    ProcessBuilder pb = new ProcessBuilder("/home/alex/Desktop/BASH/script");
        System.out.println("Run discovering");
        Process process = pb.start();
                int errCode = process.waitFor();
        System.out.println("Discover was executed, with any errors? " + (errCode == 0 ? "No" : "Yes"));
        //System.out.println( output(process.getInputStream()); 
    } catch (IOException e)   {
            System.out.println("error");
        }
        }   
try {
        FileReader fr = new FileReader("/home/alex/Desktop/BASH/FiltredInterface.txt");
        BufferedReader br = new BufferedReader(fr);
        String text="";
        String str;
        while ((str = br.readLine()) != null) {
            System.out.println(str + "\n");
            text+=str + "\n";
}
        jTextPane1.setText(text);
        br.close(); 
    } catch (IOException e) {
        System.out.println("File not found");
    }

Куда правильнее объявить метод? Я пытался объявить метод вот так:

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        public static void main(String[] args){
try { 
    ProcessBuilder pb = new ProcessBuilder("/home/alex/Desktop/BASH/script");

вот полный класс:

package com.lldpdiscover.alex;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class NewJFrame1 extends javax.swing.JFrame {
    /**
     * Creates new form NewJFrame1
     */
    public NewJFrame1() {
        initComponents();
    }
    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {
        jButton1 = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTextPane1 = new javax.swing.JTextPane();
        jScrollPane2 = new javax.swing.JScrollPane();
        jTextPane2 = new javax.swing.JTextPane();
        jScrollPane3 = new javax.swing.JScrollPane();
        jTextPane3 = new javax.swing.JTextPane();
        jScrollPane4 = new javax.swing.JScrollPane();
        jTextPane4 = new javax.swing.JTextPane();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        jButton1.setForeground(new java.awt.Color(198, 73, 73));
        jButton1.setText("Discover");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });
        jScrollPane1.setViewportView(jTextPane1);
        jScrollPane2.setViewportView(jTextPane2);
        jScrollPane3.setViewportView(jTextPane3);
        jScrollPane4.setViewportView(jTextPane4);
        jLabel1.setText("Which Interfaces you have");
        jLabel2.setText("Which OS you have");
        jLabel3.setText("Which IP you have");
        jLabel4.setText("Which  Chassis");
        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(39, 39, 39)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(jButton1)
                            .addComponent(jScrollPane2, javax.swing.GroupLayout.DEFAULT_SIZE, 372, Short.MAX_VALUE)
                            .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 372, Short.MAX_VALUE)
                            .addComponent(jScrollPane3)
                            .addComponent(jScrollPane4)))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(179, 179, 179)
                        .addComponent(jLabel1))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(192, 192, 192)
                        .addComponent(jLabel2))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(204, 204, 204)
                        .addComponent(jLabel3))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(202, 202, 202)
                        .addComponent(jLabel4)))
                .addContainerGap(481, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(31, 31, 31)
                .addComponent(jButton1)
                .addGap(21, 21, 21)
                .addComponent(jLabel1)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 108, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(jLabel2)
                .addGap(3, 3, 3)
                .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 110, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(jLabel3)
                .addGap(9, 9, 9)
                .addComponent(jScrollPane3, javax.swing.GroupLayout.PREFERRED_SIZE, 108, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 27, Short.MAX_VALUE)
                .addComponent(jLabel4)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jScrollPane4, javax.swing.GroupLayout.PREFERRED_SIZE, 110, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(35, 35, 35))
        );
        pack();
    }// </editor-fold>                        
    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         

try {
        FileReader fr = new FileReader("/home/alex/Desktop/BASH/FiltredInterface.txt");
        BufferedReader br = new BufferedReader(fr);
        String text="";
        String str;
        while ((str = br.readLine()) != null) {
            System.out.println(str + "\n");
            text+=str + "\n";
}
        jTextPane1.setText(text);
        br.close(); 
    } catch (IOException e) {
        System.out.println("File not found");
    }
try { 
        FileReader fr2 = new FileReader("/home/alex/Desktop/BASH/FiltredSystemNames.txt");
        BufferedReader br2 = new BufferedReader(fr2);
        String text="";
        String str;
        while ((str = br2.readLine()) != null) {
            System.out.println(str + "\n");
            text+=str + "\n";
}
        jTextPane2.setText(text);
        br2.close(); 
    } catch (IOException e) {
        System.out.println("File not found");
    }
try { 
    FileReader fr3 = new FileReader("/home/alex/Desktop/BASH/FiltredIP.txt");
        BufferedReader br3 = new BufferedReader(fr3);
        String text="";
        String str;
        while ((str = br3.readLine()) != null) {
            System.out.println(str + "\n");
            text+=str + "\n";
}
        jTextPane3.setText(text);
        br3.close(); 
    } catch (IOException e) {
        System.out.println("File not found");
    }
try {
    FileReader fr4 = new FileReader("/home/alex/Desktop/BASH/FiltredChassis.txt");
        BufferedReader br4 = new BufferedReader(fr4);
        String text="";
        String str;
        while ((str = br4.readLine()) != null) {
            System.out.println(str + "\n");
            text+=str + "\n";
}
        jTextPane4.setText(text);
        br4.close(); 
    } catch (IOException e) {
        System.out.println("File not found");
}

    }                                        
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(NewJFrame1.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(NewJFrame1.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(NewJFrame1.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(NewJFrame1.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>
        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new NewJFrame1().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JScrollPane jScrollPane3;
    private javax.swing.JScrollPane jScrollPane4;
    private javax.swing.JTextPane jTextPane1;
    private javax.swing.JTextPane jTextPane2;
    private javax.swing.JTextPane jTextPane3;
    private javax.swing.JTextPane jTextPane4;
    // End of variables declaration                   
}