我在这里写的原因是我在努力重命名文件。我创建了一个Java swing接口，通过使用按钮选择文件来重命名文件，然后使用用户在输入字段中输入的新名称对其进行重命名。但是一旦我尝试链接选定的文件，我就会在方法.getparent（）和renameto（）中显示错误。你能帮我一下吗？我得到的错误是：线程“ AWT-EventQueue-0”中的异常java.lang.RuntimeException：无法编译的源代码-错误的符号类型：java.lang.Object.getParent谢谢
package dpo3_ea_a3_mala;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;
/**
*
* @author
*/
public class CatFileManager extends javax.swing.JFrame {
private Object file;
/**
* Creates new form CatFileManager
*/
public CatFileManager() {
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() {
DescriptionSelectFile1 = new javax.swing.JLabel();
DescriptionSelectFile2 = new javax.swing.JLabel();
Background = new javax.swing.JPanel();
Logo = new javax.swing.JLabel();
jLabel1 = new javax.swing.JLabel();
Create = new javax.swing.JButton();
SelectRename = new javax.swing.JButton();
Read = new javax.swing.JButton();
Delete = new javax.swing.JButton();
DescriptionCreate = new javax.swing.JLabel();
InputCreate = new javax.swing.JTextField();
jScrollPane1 = new javax.swing.JScrollPane();
ReadArea = new javax.swing.JTextArea();
DescriptionSelectFile = new javax.swing.JLabel();
jScrollPane2 = new javax.swing.JScrollPane();
CreateArea1 = new javax.swing.JTextArea();
DescriptionSelectFile3 = new javax.swing.JLabel();
RenameName = new javax.swing.JLabel();
RenameInput = new javax.swing.JTextField();
jButton1 = new javax.swing.JButton();
DeleteDescription = new javax.swing.JLabel();
DescriptionSelectFile1.setText("Selecciona el archivo a leer:");
DescriptionSelectFile2.setText("Selecciona el archivo a leer:");
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
Background.setBackground(new java.awt.Color(204, 255, 255));
Background.setBorder(javax.swing.BorderFactory.createMatteBorder(1, 1, 1, 1, new java.awt.Color(204, 51, 255)));
Logo.setIcon(new javax.swing.ImageIcon(getClass().getResource("/dpo3_ea_a3_mala/Cat.png"))); // NOI18N
Logo.setBorder(javax.swing.BorderFactory.createMatteBorder(1, 1, 1, 1, new java.awt.Color(204, 51, 255)));
jLabel1.setFont(new java.awt.Font("Hiragino Kaku Gothic StdN", 1, 24)); // NOI18N
jLabel1.setText("CAT FILE MANAGER");
Create.setText("Crear");
Create.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
CreateActionPerformed(evt);
}
});
SelectRename.setText("Seleccionar");
SelectRename.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
SelectRenameActionPerformed(evt);
}
});
Read.setText("Leer este Archivo Ya!");
Read.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
ReadActionPerformed(evt);
}
});
Delete.setText("Archivo para Eliminar");
Delete.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
DeleteActionPerformed(evt);
}
});
DescriptionCreate.setText("Nombre el archivo:");
ReadArea.setBackground(new java.awt.Color(255, 204, 255));
ReadArea.setColumns(20);
ReadArea.setRows(5);
jScrollPane1.setViewportView(ReadArea);
DescriptionSelectFile.setText("Selecciona el archivo a leer:");
CreateArea1.setBackground(new java.awt.Color(255, 204, 255));
CreateArea1.setColumns(20);
CreateArea1.setRows(5);
jScrollPane2.setViewportView(CreateArea1);
DescriptionSelectFile3.setText("Selecciona el archivo a renombrar:");
RenameName.setText("Nuevo nombre del archivo:");
RenameInput.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
RenameInputActionPerformed(evt);
}
});
jButton1.setText("Renombrar");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
DeleteDescription.setText("Selecciona el archivo a eliminar:");
javax.swing.GroupLayout BackgroundLayout = new javax.swing.GroupLayout(Background);
Background.setLayout(BackgroundLayout);
BackgroundLayout.setHorizontalGroup(
BackgroundLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(BackgroundLayout.createSequentialGroup()
.addGroup(BackgroundLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(BackgroundLayout.createSequentialGroup()
.addGap(186, 186, 186)
.addComponent(jLabel1))
.addGroup(BackgroundLayout.createSequentialGroup()
.addComponent(Logo, javax.swing.GroupLayout.PREFERRED_SIZE, 172, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(DescriptionCreate))
.addGroup(BackgroundLayout.createSequentialGroup()
.addContainerGap()
.addComponent(DescriptionSelectFile3)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(SelectRename, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
.addContainerGap())
.addGroup(BackgroundLayout.createSequentialGroup()
.addContainerGap()
.addGroup(BackgroundLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(BackgroundLayout.createSequentialGroup()
.addComponent(DeleteDescription)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(Delete, javax.swing.GroupLayout.PREFERRED_SIZE, 258, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap())
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, BackgroundLayout.createSequentialGroup()
.addComponent(jScrollPane1)
.addGap(19, 19, 19))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, BackgroundLayout.createSequentialGroup()
.addComponent(DescriptionSelectFile)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(Read, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGap(13, 13, 13))
.addGroup(BackgroundLayout.createSequentialGroup()
.addComponent(RenameName)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(RenameInput)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 129, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap())
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, BackgroundLayout.createSequentialGroup()
.addGap(0, 0, Short.MAX_VALUE)
.addGroup(BackgroundLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(Create, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.PREFERRED_SIZE, 280, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(InputCreate, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.PREFERRED_SIZE, 153, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(19, 19, 19))))
.addGroup(BackgroundLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, BackgroundLayout.createSequentialGroup()
.addContainerGap(184, Short.MAX_VALUE)
.addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 274, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(19, 19, 19)))
);
BackgroundLayout.setVerticalGroup(
BackgroundLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(BackgroundLayout.createSequentialGroup()
.addGroup(BackgroundLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(BackgroundLayout.createSequentialGroup()
.addGap(21, 21, 21)
.addComponent(jLabel1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(BackgroundLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(DescriptionCreate)
.addComponent(InputCreate, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(4, 4, 4)
.addComponent(Create))
.addComponent(Logo, javax.swing.GroupLayout.PREFERRED_SIZE, 210, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(BackgroundLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(Read)
.addComponent(DescriptionSelectFile))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addGroup(BackgroundLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(DescriptionSelectFile3)
.addComponent(SelectRename))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(BackgroundLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(RenameName)
.addComponent(RenameInput, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jButton1))
.addGap(18, 18, 18)
.addGroup(BackgroundLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(DeleteDescription)
.addComponent(Delete))
.addContainerGap(31, Short.MAX_VALUE))
.addGroup(BackgroundLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(BackgroundLayout.createSequentialGroup()
.addGap(126, 126, 126)
.addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(298, Short.MAX_VALUE)))
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(Background, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(Background, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(0, 6, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void CreateActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String nombreArchivo=InputCreate.getText();
String carpeta = System.getProperty("user.dir");
String direccionCompleta= carpeta+"/"+nombreArchivo+".txt";
FileWriter ubicacion = null;
try {
ubicacion = new FileWriter(direccionCompleta);
} catch (IOException ex) {
Logger.getLogger(crear.class.getName()).log(Level.SEVERE, null, ex);
}
try{
BufferedWriter escritor = new BufferedWriter(ubicacion);
escritor.write(CreateArea1.getText());
escritor.close();
} catch(Exception e){
}
}
private void RenameInputActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void DeleteActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
JFileChooser fc=new JFileChooser();
fc.showOpenDialog(null);
File ArchivoBorrado = fc.getSelectedFile();
if (ArchivoBorrado.delete())
JOptionPane.showMessageDialog(null, "Borrado Exitoso");
else
JOptionPane.showMessageDialog(null, "Error! Intenta borrarlo otra vez!");
}
private void ReadActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
JFileChooser fc=new JFileChooser();
fc.showOpenDialog(null);
File archivo = fc.getSelectedFile();
try{
FileReader fr = new FileReader (archivo);
BufferedReader br = new BufferedReader(fr);
String texto="";
String linea="";
while(((linea=br.readLine())!=null) ){
texto+=linea+"\n";
}
ReadArea.setText(texto);
}
catch(Exception e){
}
}
private void SelectRenameActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
JFileChooser fc=new JFileChooser();
fc.showOpenDialog(null);
file = fc.getSelectedFile();
}
///Problems start here!!
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String nvo=file.getParent()+"\\"+RenameInput.getText()+".txt";
File f2 = new File(RenameInput.getText()); //Here doesnt work!
boolean correcto = file.renameTo(f2);//Rename method doesnt work
if (correcto==true)
JOptionPane.showMessageDialog(null,"Succesful");
else
JOptionPane.showMessageDialog(null,"El ");
}
/**
* @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(CatFileManager.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(CatFileManager.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(CatFileManager.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(CatFileManager.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 CatFileManager().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JPanel Background;
private javax.swing.JButton Create;
private javax.swing.JTextArea CreateArea1;
private javax.swing.JButton Delete;
private javax.swing.JLabel DeleteDescription;
private javax.swing.JLabel DescriptionCreate;
private javax.swing.JLabel DescriptionSelectFile;
private javax.swing.JLabel DescriptionSelectFile1;
private javax.swing.JLabel DescriptionSelectFile2;
private javax.swing.JLabel DescriptionSelectFile3;
private javax.swing.JTextField InputCreate;
private javax.swing.JLabel Logo;
private javax.swing.JButton Read;
private javax.swing.JTextArea ReadArea;
private javax.swing.JTextField RenameInput;
private javax.swing.JLabel RenameName;
private javax.swing.JButton SelectRename;
private javax.swing.JButton jButton1;
private javax.swing.JLabel jLabel1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
// End of variables declaration
private static class crear {
public crear() {
}
}
}
private Object file;
应该是：
private File file; // has methods getParent() & renameTo(File)