try....catch...exception

public static int add(){

try{

int i = 2/0;

return 0;

}

catch (Exception e) {

e.printStackTrace();

System.out.println("hello");

return 1;

}

finally{

System.out.println("执行到finally");

return 4;

}

}

代码执行顺序：若finally块没有return就先执行finally最后return，

若finally块有return则先执行catch的return最后执行finally的return