Set and Print

import java.io.PrintWriter;
import java.io.Writer;

public class SetAndPrint {
  private int val;
  private Writer w;

  public SetAndPrint(Writer w) {
    this.w = w;
  }

  public void setVal(int val) {
    this.val = val;
    try {
      w.write(Integer.toString(this.val));
      w.write("\n");
      w.flush();
    }
    catch (Exception e) {
    }
  }

  public static void main(String[] args) {
    SetAndPrint s =
      new SetAndPrint(new PrintWriter(System.out));
    s.setVal(3);
  }
}