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Pseudo class is to show different state of an element or a css selector. Active pseudo class is to show that the element is in active state.This pseudo class is mostly being associated with link and button or any other element which can be active.For example if it is associated with link that the link is active.Syntaxa:active { color:green;}Let's check the actual usage of :active pseudo class with different scenarios, as follows −Example Live Demo a:active { color:green;} Click here to learn ExplanationWhen you first time see the link ... Read More
A zombie process is a process whose execution is completed but it still has an entry in the process table. Zombie processes usually occur for child processes, as the parent process still needs to read its child’s exit status. Once this is done using the wait system call, the zombie process is eliminated from the process table. This is known as reaping the zombie process.A diagram that demonstrates the creation and termination of a zombie process is given as follows −Salient points of Zombie ProcessesSome of the salient points related to zombie processes are as follows −All the memory and ... Read More
When we start two or more threads within a program, there may be a situation when multiple threads try to access the same resource and finally they can produce unforeseen result due to concurrency issues. For example, if multiple threads try to write within a same file then they may corrupt the data because one of the threads can override data or while one thread is opening the same file at the same time another thread might be closing the same file.So there is a need to synchronize the action of multiple threads and make sure that only one thread ... Read More
The input type button can be a submit button or reset button. With CSS, we can style any button on a web page.You can try to run the following code to style input type button:ExampleLive Demo input[type = submit], input[type = reset] { background-color: orange; border: none; text-decoration: none; color: white; padding: 20px 20px; margin: 20px 20px; cursor: pointer; } Fill the below form, Subject Student
The volatile modifier is used to let the JVM know that a thread accessing the variable must always merge its own private copy of the variable with the master copy in the memory.Accessing a volatile variable synchronizes all the cached copied of the variables in the main memory. Volatile can only be applied to instance variables, which are of type object or private. A volatile object reference can be null.Examplepublic class MyRunnable implements Runnable { private volatile boolean active; public void run() { active = true; while (active) { } } public void stop() { active = false; } }
To add background color to the form input, use the background-color property.You can try to run the following code to implement the background color property to formExampleLive Demo input[type=text] { width: 100%; padding: 10px 15px; margin: 5px 0; box-sizing: border-box; background-color: gray; } Fill the below form, Subject Student
To style the options in , you can try to run the following code,ExampleLive Demo select { width: 100%; padding: 10px 15px; border: 1px dashed blue; border-radius: 4px; background-color: orange; } Learn, Java Ruby Oracle Tableau
Jagged array is a multidimensional array where member arrays are of different size. For example, we can create a 2D array where first array is of 3 elements, and is of 4 elements. Following is the example demonstrating the concept of jagged array.Example Live Demopublic class Tester { public static void main(String[] args){ int[][] twoDimenArray = new int[2][]; //first row has 3 columns twoDimenArray[0] = new int[3]; //second row has 4 columns twoDimenArray[1] = new int[4]; int counter = ... Read More
To set border to form inputs, use the CSS border property.You can try to run the following code to add borderExampleLive Demo input[type = text] { width: 100%; padding: 10px 15px; margin: 5px 0; box-sizing: border-box; border: 3px inset orange; } Fill the below form, Subject Student
To add space inside a form’s text field, use the CSS padding property.You can try to run the following code to achieve this:ExampleLive Demo input[type = text] { width: 100%; padding: 10px 15px; margin: 5px 0; box-sizing: border-box; } Fill the below form, Subject Student