修改getId为threadId。

多线程编程/MultiThread/src/main/java/com/cpic/xim/App.java

@@ -22,6 +22,6 @@ public class App
         workThread.start();
         jobThread.start();
 
-        System.out.println( "我是主线程！" + String.valueOf(Thread.currentThread().getId()) );
+        System.out.println( "我是主线程！" + String.valueOf( Thread.currentThread().threadId() ) );
     }
 }

多线程编程/MultiThread/src/main/java/com/cpic/xim/utils/MyThread.java

@@ -16,6 +16,6 @@ public class MyThread extends Thread
     {
         super.run();
 
-        System.out.println("我是工作线程:" + String.valueOf(Thread.currentThread().getId()) );
+        System.out.println("我是工作线程:" + String.valueOf(Thread.currentThread().threadId()) );
     }
 }

多线程编程/MultiThread/src/main/java/com/cpic/xim/utils/MyWorkingJob.java

@@ -15,6 +15,6 @@ public class MyWorkingJob implements Runnable
     @Override
     public void run()
     {
-        System.out.println("我是workingJob，ID是" + String.valueOf( Thread.currentThread().getId()));
+        System.out.println("我是workingJob，ID是" + String.valueOf( Thread.currentThread().threadId()));
     }
 }