Operasi File

Latihan 1

ü  File tidak dibuat ketika memanggil konstruktor File.

ü  File baru akan dibuat bila memanggil method createNewFile() dari obyek method createNewFile() dari obyek File.

ü  Perhatikan program berikut ini beserta outputnya.

package OperasiFile;

import java.io.File;

public class Navigate {

       public static void main(String[] args) {

              // TODO Auto-generated method stub

              File saveFile = new File("text.txt");

              System.out.println(saveFile.getAbsolutePath());

              System.out.println(saveFile.getPath());

              System.out.println(saveFile.exists());

       }

}

 

Latihan 2

Membuat direktori dan file dengan File

package OperasiFile;

import java.io.File;

public class MakeDir {

       public static void main(String[] args) {

              // TODO Auto-generated method stub

              File saveDir = new File("save");

              System.out.println(saveDir.mkdir());

              File saveFile = new File(saveDir, "palyer.dat");

              System.out.println(saveFile.getAbsolutePath());

              System.out.println(saveFile.getPath());

              System.out.println(saveFile.isDirectory());

       }

}

 

  

Latihan 3

Melakukan cek apakah suatu file merupakan direktori. Jika direktori tampilkan semua file yang terdapat didalamnya.

package OperasiFile;

import java.io.File;

public class FileInfo {

       public static void main(String[] args) {

              // TODO Auto-generated method stub

              String namaDir = "F:\\Pemrograman Jaringan Komputer";

              File f = new File(namaDir);

              if(f.isDirectory()) {

                     System.out.println(namaDir + " adalah directory");

                     String[]s = f.list();

                     for(int i = 0; i<s.length; i++) {

                           System.out.println(s[i]);

                     }

              }else {

                     System.out.println(namaDir+ "bukan directory");

              }

 

       }

}

Latihan 4

File.separator

package OperasiFile;

import java.io.File;

public class Separator {

       public static void main(String[] args) {

              // TODO Auto-generated method stub

              String folders = "data" + File.separator + "save";

              System.out.println(" Creating folder " + folders);

              File dir = new File(folders);

              System.out.println(dir.getAbsolutePath());

       }

 

}

Latihan 5

Menggunakan forward slash sebagai separator

package OperasiFile;

import java.io.File;

public class Sep {

       public static void main(String[] args) {

              // TODO Auto-generated method stub

              String folders = "data/save";

              System.out.println(" Creating folder " + folders);

              File dir = new File(folders);

              System.out.println(dir.getAbsolutePath());

       }

}

Latihan 6

ü  Menampilkan daftar file dalam suaru direktori dengan menggunakan JFileChooser.

ü  Digunakan JFrame sebagai container

package OperasiFile;

import java.io.*;

import java.io.File;

import javax.swing.*;

import java.awt.*;

import java.awt.Event.*;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

public class FileChooser extends JFrame{

      

       private JFileChooser fChooser;

       private File f;

       private String namaFile;

      

       public FileChooser() {

              Container c = getContentPane();

              fChooser = new JFileChooser();

              int pilihan = fChooser.showOpenDialog(c);

              if(pilihan == JFileChooser.APPROVE_OPTION) {

                     f = fChooser.getSelectedFile();

                     namaFile = f.getName();

                     System.out.println("Nama file : " + namaFile);

              }

             

              addWindowListener(new WindowAdapter(){

                     public void WindowClosing(WindowEvent ev) {

                           System.exit(0);

                     }

              });

             

              setSize(300, 300);

              setLocation(100, 100);

       }

      

       public static void main(String[] args) {

              // TODO Auto-generated method stub

              new FileChooser().show();

       }

}