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