Java.io.PrintStream.checkError() 方法

package com.codingdict;



import java.io.*;



public class PrintStreamDemo {



   public static void main(String[] args) {

      String s = "Hello World.";



      // create a new PrintStream

      PrintStream ps = new PrintStream(System.out);



      // print a string

      ps.println(s);



      // check for errors and print

      ps.print(ps.checkError());

      ps.flush();

      ps.close();

   }

}