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The page I am working on has a javascript function executed to print parts of the page. For some reason, printing in Safari, causes the window to somehow update. I say somehow, because it does not really refresh as in reload the page, but rather it starts the "rendering" of the page from start, i.e. scroll to top, flash animations start from 0, and so forth. The effect is reproduced by this fiddle: http://jsfiddle.net/fYmnB/ Clicking the print button and finishing or cancelling a print in Safari causes the screen to "go white" for a sec, which in my real website manifests itself as something "like" a reload. While running print button with, let's say, Firefox, just opens and closes the print dialogue without affecting the fiddle page in any way. Is there something with my way of calling the browsers print method that causes this, or how can it be explained - and preferably, avoided? P.S.: On my real site the same occurs with Chrome. In the ex
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Sometimes when setting a variable, you may want to do something else with the given value other than instantly place it in the class's variable: for instance, you may want to validate it or update another value that is related.
ReplyDeleteBasically, it lets the class which owns that variable control what can be done to it, and the specific series of events that occur when it is altered.
e.g. we can verify that user setting age of person is not more than 150 or less than zero.
public class Person{
private int age;
public int getAge(){
return this.age;
}
public void setAge(int age){
if(age<150 && age>0){
this.age=age;
}
}
}
It also needs to be mentioned that it is not always better to use "set" methods. Blind compliance with patterns may lead to overcomplicated code. If class acts as just simple (really simple) data container, then public access is often acceptable. In example, look at java.awt.Rectangle or at java.awt.Point classes.
ReplyDeleteIt all has to do with object orientation and how strict you are in that doctrine. If you strictly follow all the guidelines, it is bad to directly use methods and identifiers from one class, by the other. Technically there is no objection.
ReplyDeleteThis discussion is the same as the static - no static discussion. The (self proclaimed) guru, found that sacrilege, but you put your computer no obstacle in the way, if you put your whole program is static.