Java - File / Folder Exists

Java - How To Check If File Or Directory Exists Using Java

Java Directory Exists



In this Java Tutorial we will see How To Verify If File Or A Folder Exists From A Path String Using Java NetBeans .




Project Source Code:


package javaapplication1;

import java.io.File;
import javax.swing.JOptionPane;

/**
 *
 * @author omar
 */
public class Java_File_Exists extends javax.swing.JFrame {

    /**
     * Creates new form Java_File_Exists
     */
    public Java_File_Exists() {
        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() {

        jTextFieldPath = new javax.swing.JTextField();
        jButtonCheck = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jTextFieldPath.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N

        jButtonCheck.setText("Check");
        jButtonCheck.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButtonCheckActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jTextFieldPath, javax.swing.GroupLayout.PREFERRED_SIZE, 392, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(jButtonCheck, javax.swing.GroupLayout.PREFERRED_SIZE, 111, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(28, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(59, 59, 59)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jTextFieldPath, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jButtonCheck))
                .addContainerGap(49, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        

    private void jButtonCheckActionPerformed(java.awt.event.ActionEvent evt) {                                             
       
        File f = new File(jTextFieldPath.getText());
        
        if(f.exists())
        {
            if(f.isDirectory())
            {
               JOptionPane.showMessageDialog(null, "is Directory"); 
            }else
            {
                JOptionPane.showMessageDialog(null, "Is File");
            }
            
        }else{
            JOptionPane.showMessageDialog(null, "File Not Exists");
        }
        
    }                                            

    /**
     * @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(Java_File_Exists.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(Java_File_Exists.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(Java_File_Exists.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(Java_File_Exists.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 Java_File_Exists().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton jButtonCheck;
    private javax.swing.JTextField jTextFieldPath;
    // End of variables declaration                   
}

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