可以用setPriority来设置线程的优先级，getPriority取得线程的优先级：

1 package priority; 2  3 import sharevar.Machine; 4  5 public class priority extends Thread { 6     private static StringBuffer log=new StringBuffer(); 7     private static int count=0; 8      9     public void run() {10         for (int a=0;a<20;a++) {11             log.append(currentThread().getName()+":"+a);12             if (++count %10==0) log.append("\n");13         }14     }15 16     /**17      * @param args18      */19     public static void main(String[] args) {20         // TODO Auto-generated method stub21         Machine m1=new Machine();22         Machine m2=new Machine();23         m1.setName("m1");24         m2.setName("m2");25         26         Thread main=Thread.currentThread();   //获得主线程27         //查看和设置线程的优先级28         System.out.println("default priority of main:"+main.getPriority());29         //打印m2线程默认优先级30         System.out.println("default priority of m1:"+m1.getPriority());31         //打印m2线程默认优先级32         System.out.println("default priority of m2:"+m2.getPriority());33         34         m2.setPriority(Thread.MAX_PRIORITY);35         m1.setPriority(Thread.MIN_PRIORITY);36         37         m1.start();38         m2.start();39         System.out.println(log);40     }41 42 }