Java tutorial
import java.io.FileWriter; import java.io.IOException; public class Main { public static void main(String args[]) throws IOException { String source = "test"; 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(); } }