Java_Shell多线程

    #!/bin/bash
    source ~/.bashrc  

    fun(){
        echo "fun is begin.timeNum:$timeNum"
        local timeNum=$
        sleep $timeNum &
        wait #这个只等待wait前面sleep  

        echo "fun is end.timeNum:$timeNum"
    }  

    fun  &
    fun  &  

    wait #如果fun里面没有wait，则整个脚本立刻退出，不会等待fun里面的sleep
    echo "all is ending"