What are the different types of dialog boxes in JavaScript?
1. Alert Dialog Box: These are simple pop-up boxes that contains an alert message with an OK button.
2. Confirm Dialog Box: These are used to ask for user confirmation. It contains an OK button and a Cancel button.
3. Prompt Dialog Box: These are used to ask for user input. It contains a text box to accept user input along with an OK button and a Cancel button.
4. Custom Dialog Box: These are user-defined dialog boxes that can be adapted for different tasks. This type of dialog boxes are typically designed using HTML, CSS, and JavaScript.
Date:2023-03-09
Is Java a good choice for Android development?
Yes, Java is a great choice for Android development. It is one of the most popular programming languages for creating Android apps, and has been the official language for Android app development for many years. It is easy to learn, and the platform provides a comprehensive set of tools for building apps quickly and efficiently. Java is also well-suited for developing for multiple devices, providing more options for creating applications with multiple form factors.
Date:2023-03-09
What is javac -SourcePath?
Javac -SourcePath is a command line option for the Java compiler that specifies the base directory for where the Java source files are located. This option helps the compiler locate the source files when compiling. When this option is used, the compiler searches the specified directory for any .java files that are part of the project.
Date:2023-03-08
How to delete an object in JavaScript?
To delete an object in JavaScript, you can use the delete operator. The syntax is as follows:
delete OBJECT_NAME;
For example:
let car = {make: "Ford", model: "Mustang"};
delete car;
Date:2023-03-07
What happens if a Java application runs out of memory?
If a Java application runs out of memory, it will throw an OutOfMemoryError. This will cause the application to stop running and the JVM to crash. The program will not be able to continue running until more memory is allocated to the application. Otherwise, the application will need to be restarted or terminated.
Date:2023-03-07
How to add a separator to a toolbar in Java?
To add a separator to a toolbar in Java, use the addSeparator() method of the JToolBar class. This method takes no parameters and adds a separator to the end of a toolbar.
Example:
JToolBar toolbar = new JToolBar();
//add buttons and other elements to the toolbar
toolbar.addSeparator(); //adds a separator at the end of the toolbar
Date:2023-03-06
What are the variables in JavaScript?
Variables in JavaScript are used to store data values. Common types of variables include numbers, strings, booleans, objects, arrays, and functions.
Date:2023-03-06
How do I use the JavaScript debugger?
Using a JavaScript debugger is a great way to quickly identify and troubleshoot errors in your code. To begin debugging in a web browser such as Chrome, you can use the built-in developer tools. To open the developer tools in Chrome, press F12 on your keyboard. Alternatively, you can right-click on the page and select ‘inspect’. Once the developer tools are open, you can select the ‘Sources’ tab. From there, you can select the source file that you would like to debug and set breakpoints by clicking on the line number of the source code where you would like to start debugging. When the breakpoint is set, reload the page and the JavaScript debugger will stop at the specified breakpoint and you will be able to step through the code to troubleshoot any issues.
Date:2023-03-05
What is JConsole in Java?
JConsole is a Java Monitoring and Management Console application included in the Java Development Kit (JDK) since Java 5. It is used to monitor the resources and performance of a Java Virtual Machine, and diagnose and troubleshoot problems in the application or environment. JConsole supports local and remote processes. It allows users to connect to a remote application and monitor its resources, performance, and threads, as well as perform garbage collection analysis.
Date:2023-03-05