import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; public class Writebin { public static void main(String[] argv) throws IOException { int i = 42; String foo = "Hello"; String FILENAME = "binary.txt"; DataOutputStream os = new DataOutputStream(new FileOutputStream(FILENAME)); os.writeInt(i); os.writeUTF(foo); os.close(); DataInputStream di = new DataInputStream(new FileInputStream (FILENAME)); System.out.println(di.readInt()); System.out.println(di.readUTF()); di.close(); } }