So, in the case of a JButton, if the third argument was text, then this would equate to a setText() call, where the argument to the method was represented by the String sent into the fourth argument.

所以，对于 JButton ，如果第三个参数是 text ，那么这相当于一个 setText() 调用，该方法所需要的参数是由传递给第四个参数的 String 来表示的。

youdao