import java.io.ByteArrayOutputStream;

 import java.io.PrintStream;

 public class Test {

     public static void main(String[] args) {

         PrintStream out=System.out;

         ByteArrayOutputStream outContent = new ByteArrayOutputStream();

         System.setOut(new PrintStream(outContent));

         System.out.println("hello");

         System.setOut(out);

         System.out.println(outContent.toString().equals("hello\n"));

         outContent.reset();

         System.setOut(new PrintStream(outContent));

         System.out.print("hello\n");

         System.setOut(out);

         System.out.println(outContent.toString().equals("hello\n"));

     }

 }