122. Thread class thread method summary; Why is the thread start method start () not run ()?

Thread Class thread method summary

<1> currentThread Get the current thread object ;
<2>getName Get the name of the thread ;
<3>setName Set thread ;
<4>getId Get threaded ID Uniqueness , Automatic system assignment ;
<5>setDaemon Set whether it is a background thread ;
<6>isDaemon Whether the thread is a background thread ;
<7>setPriority set priority ;
<8>getPriority Get priority ;
<9>start Start thread , Note that thread startup must use start Method ;
<10>isAlive Verify that the thread is active ;
<11>isInterrupted Whether the thread has been interrupted ;
<12>join Join in 、 Merge ;
<13>yield Comity ;
<14>interrupt Interrupt threads ;
<15>sleep sleep ;

Why is the thread startup method start() No run()？

start() After method , The state of the thread will switch to Ready state , Can participate cpu Assigned by ; and run Method , Manual call , Not at all Thread mechanism ; But ordinary object method calls , At this time, the sub thread is not working ;