كيف اقوم بعمل copy & paste عن طريق JButtons?

عند الضغط على copy هتقوم بقراءة الملف اللى المستخدم اختاره

وتخزنه عندك وعندما يقوم المستخدم بالضغط على past يقوم بكتابه الملف فى المكان الذى سيختاره

ممكن لو سمحت التوضيح بكود بسيط لو امكن

هتستخدم الـ I/O in Java للتعامل مع الملفات وقراءتها

يمكنك متابعه هذا الموضوع وتلقى نظره على الـ IO

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قم بكتابه الكود واعرضه علينا ان كان به اخطاء

بالتوفيق

شكرا جزيلا لك

كود بسيط لنسخ ملف نصي

import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class Copy {
  public static void main(String[] args) throws IOException {
    File inputFile = new File("farrago.txt");
    File outputFile = new File("outagain.txt");

    FileReader in = new FileReader(inputFile);
    FileWriter out = new FileWriter(outputFile);
    int c;

    while ((c = in.read()) != -1)
      out.write(c);

    in.close();
    out.close();
  }
}

أتتمنى أن تتكتب كود وتعرضه علينا كما قال أخ محمود

تستطيع العمل بمكتبة جافا Java IO API

هذا كود يعمل على نسخ

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;

public class FileCopy {
  public static void main(String[] args) {
    try {
      copy("fromFile.txt", "toFile.txt");
    } catch (IOException e) {
      System.err.println(e.getMessage());
    }
  }

  public static void copy(String fromFileName, String toFileName)
      throws IOException {
    File fromFile = new File(fromFileName);
    File toFile = new File(toFileName);

    if (!fromFile.exists())
      throw new IOException("FileCopy: " + "no such source file: "
          + fromFileName);
    if (!fromFile.isFile())
      throw new IOException("FileCopy: " + "can't copy directory: "
          + fromFileName);
    if (!fromFile.canRead())
      throw new IOException("FileCopy: " + "source file is unreadable: "
          + fromFileName);

    if (toFile.isDirectory())
      toFile = new File(toFile, fromFile.getName());

    if (toFile.exists()) {
      if (!toFile.canWrite())
        throw new IOException("FileCopy: "
            + "destination file is unwriteable: " + toFileName);
      System.out.print("Overwrite existing file " + toFile.getName()
          + "? (Y/N): ");
      System.out.flush();
      BufferedReader in = new BufferedReader(new InputStreamReader(
          System.in));
      String response = in.readLine();
      if (!response.equals("Y") && !response.equals("y"))
        throw new IOException("FileCopy: "
            + "existing file was not overwritten.");
    } else {
      String parent = toFile.getParent();
      if (parent == null)
        parent = System.getProperty("user.dir");
      File dir = new File(parent);
      if (!dir.exists())
        throw new IOException("FileCopy: "
            + "destination directory doesn't exist: " + parent);
      if (dir.isFile())
        throw new IOException("FileCopy: "
            + "destination is not a directory: " + parent);
      if (!dir.canWrite())
        throw new IOException("FileCopy: "
            + "destination directory is unwriteable: " + parent);
    }

    FileInputStream from = null;
    FileOutputStream to = null;
    try {
      from = new FileInputStream(fromFile);
      to = new FileOutputStream(toFile);
      byte[] buffer = new byte[4096];
      int bytesRead;

      while ((bytesRead = from.read(buffer)) != -1)
        to.write(buffer, 0, bytesRead); // write
    } finally {
      if (from != null)
        try {
          from.close();
        } catch (IOException e) {
          ;
        }
      if (to != null)
        try {
          to.close();
        } catch (IOException e) {
          ;
        }
    }
  }
}

وهذا كود الكود يقوم بحدف ملف

import java.io.File;

public class Delete {
  public static void main(String[] args) {
    String fileName = "file.txt";
    // A File object to represent the filename
    File f = new File(fileName);

    // Make sure the file or directory exists and isn't write protected
    if (!f.exists())
      throw new IllegalArgumentException(
          "Delete: no such file or directory: " + fileName);

    if (!f.canWrite())
      throw new IllegalArgumentException("Delete: write protected: "
          + fileName);

    // If it is a directory, make sure it is empty
    if (f.isDirectory()) {
      String[] files = f.list();
      if (files.length > 0)
        throw new IllegalArgumentException(
            "Delete: directory not empty: " + fileName);
    }

    // Attempt to delete it
    boolean success = f.delete();

    if (!success)
      throw new IllegalArgumentException("Delete: deletion failed");
  }

}

مصدر الكودهنا