以下 JAVA 代码片段输出的结果是__?

class KaiJuan implements Runnable
{
    Public static void main(String[ ] args)throws interruptedException
    {
        Thread t = new Thread(new KaiJuan());
        t.start( );
        System.out.print("m1");
        t.join( );
        System.out.print("m2");
    }

    public void run( )
    {
        System.out.print("r1");
        System.out.print("r2");
    }
}