Entries Tagged 'General' ↓

You can lock your windows desktop by clicking on “windows key + L“. There is another way to do this. By creating a shortcut.

Right Click on your desktop and select

New -> Shortcut.

A shortcut will be created and a dialog box would pop up.

Copy paste %windir%\system32\rundll32.exe user32.dll,LockWorkStation into the text box of the dialog.

Click Next. Type any name you like.

A desktop shortcut with the name that you gave would be created. Double click anytime to lock your computer.

Let me show you how you can interchange the values stored in two variables without using a temporary variable.

Case 1: For two integers

int a = 10;

int b = 20;

a = a+b;

b = a-b;

a = a-b;

Thats all!!! When you print the values stored in these two variables, you’ll notice that the values have been interchanged!

Case 2 : For two Strings

String s1 = “Shetty”;
String s2 = “Nischal”;

s1 = s1+s2;
s2 = s1.substring(0,s1.length()-s2.length());
s1 = s1.substring(s2.length());

System.out.println(”My name is “+s1+” “+s2);

The output will be: My name is Nischal Shetty

request.getParameterValues(String) in java helps retrieve a String array as parameter from the JSP.

i.e. If you have more than one value set for a variable in the JSP with the same name, you can get it as a String array using request.getParameterValues(”parameterName”)

Ex. in my jsp I set the variable as follows:

<input type=”hidden” name=”colour” value =”red”>

<input type=”hidden” name=”colour” value =”blue”>

<input type=”hidden” name=”colour” value =”green”>

Next, I try to obtain these values at the back-end java file as follows:

String colour[] = request.getParameterValues(”colour”);

All the three colours set in the JSP will be obtained in an array!!!