多项选择题 public class Threads 1 {  intx=0；  public class Runner implements Runnable {  public void run（） {  int current = 0；  for（int=i=0；i<4；i++）{  current = x；  System.out.print（current + “， “）；  x = current + 2；  }  }  }  public static void main（String[] args） {  new Threads1（）.go（）；  }  public void go（） {  Runnable r1 = new Runner（）；  new Thread（r1）.start（）；  new Thread（r1 ）.start（）；  }  }  Which two are possible results？（）

多项选择题 public class NamedCounter {  private final String name；  private int count；  public NamedCounter（String name） { this.name = name； }  public String getName（） { return name； }  public void increment（） { coount++； }  public int getCount（） { return count； } public void reset（） { count = 0； } }  Which three changes should be made to adapt this class to be used safely by multiple threads？ （）

单项选择题 public class TwoThreads {  private static Object resource = new Object（）；  private static void delay（long n） {  try { Thread.sleep（n）； }  catch （Exception e） { System.out.print（”Error “）； }  }  public static void main（String[] args） {  System.out.print（”StartMain “）；  new Thread1（）.start（）；  delay（1000）；  Thread t2 = new Thread2（）；  t2.start（）；  delay（1000）；  t2.interrupt  delay（1000）；  System.out.print（”EndMain “）；  }  static class Thread 1 extends Thread {  public void run（） {  synchronized （resource） {  System.out.print（”Startl “）；  delay（6000）；  System.out.print（”End1 “）；  }  }  }  static class Thread2 extends Thread {  public void run（） {  synchronized （resource） {  System.out.print（”Start2 “）；  delay（2000）；  System.out.print（”End2 “）；  }  }  }  }  Assume that sleep（n） executes in exactly m milliseconds， and all other code executes in an insignificant amount of time. What is the output if the main（） method is run？（）