Priority and execution order of Java threads

Priority overview

public final void setPriority(int newPriority);

public final int getPriority();

Use priority

Example 1

package ch14;
public class FirstThreadInput extends Thread
{
    public void run()
    {
        System.out.println("调用FirstThreadInput类的run()重写方法");    //输出字符串
        for(int i=0;i<5;i++)
        {
            System.out.println("FirstThreadInput线程中i="+i);    //输出信息
            try
            {
                Thread.sleep((int) Math.random()*100);    //线程休眠
            }
            catch(Exception e){}
        }
    }
}

package ch14;
public class SecondThreadInput implements Runnable
{
    public void run()
    {
        System.out.println("调用SecondThreadInput类的run()重写方法");    //输出字符串
        for(int i=0;i<5;i++)
        {
            System.out.println("SecondThreadInput线程中i="+i);    //输出信息
            try
            {
                Thread.sleep((int) Math.random()*100);    //线程休眠
            }
            catch(Exception e){}
        }
    }
}

package ch14;
public class TestThreadInput
{
    public static void main(String[] args)
    {
        FirstThreadInput fti=new FirstThread@R_502_1373@;
        Thread sti=new Thread(new SecondThread@R_502_1373@);
        fti.setPriority(4);
        sti.setPriority(4);
        fti.start();
        sti.start();
    }
}

调用FirstThreadInput类的run()重写方法
调用SecondThreadInput类的run()重写方法
FirstThreadInput线程中i=0
SecondThreadInput线程中i=0
FirstThreadInput线程中i=1
FirstThreadInput线程中i=2
SecondThreadInput线程中i=1
FirstThreadInput线程中i=3
SecondThreadInput线程中i=2
FirstThreadInput线程中i=4
SecondThreadInput线程中i=3
SecondThreadInput线程中i=4

fti.setPriority(1);
sti.setPriority(10);

调用FirstThreadInput类的run()重写方法
调用SecondThreadInput类的run()重写方法
FirstThreadInput线程中i=0
SecondThreadInput线程中i=0
SecondThreadInput线程中i=1
SecondThreadInput线程中i=2
SecondThreadInput线程中i=3
SecondThreadInput线程中i=4
FirstThreadInput线程中i=1
FirstThreadInput线程中i=2
FirstThreadInput线程中i=3
FirstThreadInput线程中i=4