Java Process isAlive()用法及代碼示例

Public Boolean isAlive()

public class Process_isAliveMethodExample1 {
        public static void main(String[] args) {   
  try{
           //A process is created. 
          System.out.println("A process is created:");
         Process p = Runtime.getRuntime().exec("mspaint.exe");
      //Waits for the process until you terminate.
        p.waitFor();
      //Tests whether the current process is alive or not.
       System.out.println(p.isAlive());
      //The process is closed manually.
     System.out.println("Manually closes the notepad.");
       //Finally the wait is over.
      System.out.println("Wait is completed.");
    }catch(Exception e)
     {
       System.out.println(e);
     }
  }}

A process is created:
false
Manually closes the notepad.
Wait is completed.

public class Process_isAliveMethodExample2 {
         public static void main(String[] args) {
    try{
          // At first Notepad is opened.
          System.out.println("Notepad will open");
          Process p1=Runtime.getRuntime().exec("notepad.exe");
        // Waits for the process p1 to terminate.
         p1.waitFor();
      //Tests whether the process p1 is alive.
        System.out.println(p1.isAlive());
     //After that notepad is opened.
         System.out.println("Ms paint will open");
         Process p2=Runtime.getRuntime().exec("mspaint.exe");
    //Again waits for the process to terminate. 
         p2.waitFor();
  // Tests whether the process p2 is alive.
        System.out.println(p2.isAlive());
      }catch(Exception e)
    {
        System.out.println("Ohho! an exception has occurred:");
    }
  }
}

Notepad will open
false
Ms paint will open
False