1 import java.io.ByteArrayOutputStream;
 2 import java.io.PrintStream;
 3 
 4 public class Test {
 5     public static void main(String[] args) {
 6         PrintStream out=System.out;
 7         ByteArrayOutputStream outContent = new ByteArrayOutputStream();
 8         System.setOut(new PrintStream(outContent));
 9         System.out.println("hello");
10         System.setOut(out);
11         System.out.println(outContent.toString().equals("hello\n"));
12         outContent.reset();
13         System.setOut(new PrintStream(outContent));
14         System.out.print("hello\n");
15         System.setOut(out);
16         System.out.println(outContent.toString().equals("hello\n"));
17     } 
18 }