filewriterdemo.java

180个针对Java初学者的简单实例180个针对Java初学者的简单实例180个针对Java初学者的简单实例

// FileWriter.类的用法
import java.io.*;
class FileWriterDemo {
  public static void main(String args[]) throws IOException {
    String source = "Now is the time for all good men\n"
      + " to come to the aid of their country\n"
      + " and pay their due taxes.";
    char buffer[] = new char[source.length()];
    source.getChars(0, source.length(), buffer, 0);

    FileWriter f0 = new FileWriter("file1.txt");
    for (int i=0; i < buffer.length; i += 2) {
      f0.write(buffer[i]);
    }
    f0.close();
    FileWriter f1 = new FileWriter("file2.txt");
    f1.write(buffer);
    f1.close();
    FileWriter f2 = new FileWriter("file3.txt");
    f2.write(buffer,buffer.length-buffer.length/4,buffer.length/4);
    f2.close();
  }
}