在Java项目中实现多线程的方法有哪些

package z; class MyThread extendsThread{    privateintticket = 10;   privateString name;   publicMyThread(String name){     this.name =name;   }      publicvoidrun(){     for(inti = 0; i < 500; i++){       if(this.ticket > 0){         System.*out*.println(this.name+"卖票---->"+(this.ticket--));       }     }   } }  public classThreadDemo {   publicstaticvoidmain(String[] args) {     MyThread mt1= newMyThread("一号窗口");     MyThread mt2= newMyThread("二号窗口");     MyThread mt3= newMyThread("三号窗口");     mt1.start();     mt2.start();     mt3.start();   } }