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In this article, we will learn about the differences between the TableCellRenderer and TableCellEditor in Java. The JTable interface in Java Swing has these important interfaces called TableCellRenderer and TableCellEditor. Though they serve different purposes, they complement each other in defining the table cells' render and edit functions. TableCellRenderer A TableCellRenderer creates a component that displays the value of a JTable cell. The default renderer uses JLabel to display the value of each table cell. The TableCellRenderer interface can be specified in three ways : By the class of the object to be ... Read More
In this article, we will learn about the importance of the JSeparator class in Java. In GUI programming, appearance is highly important in creating good and user-friendly Java programs. Java Swing provides the JSeparator class as a simple but effective means of accomplishing this. What is JSeparator? A JSeparator is a horizontal or vertical line or an empty area used to split the components. A class called JSeparator is used to paint a line in order to divide the components within a Layout. The simplest way to insert a separator into a menu or a toolbar is by invoking the ... Read More
In Java, a JTextPane is an extension of JEditorPane which provides word processing features like fonts, text styles, colors and etc. If we need to do heavy-duty text processing, we can use this class, whereas a JEditorPane supports display/editing of HTML and RTF content and can be extended by creating our own EditorKit. JTextPane A JTextPane is a subclass of JEditorPane. A JTextPane is used for a styled document with embedded images and components. A JTextPane is a text component that can be marked up with the attributes that are represented graphically and it can use a DefaultStyledDocument as the ... Read More
Given a string like "-27.89", we can convert it into a double value such as -27.890000. In this article, we use various approaches from C/C++ library functions to perform this string into double conversion: Using atof() Function Using strtod() Function Using stod() Function Using stringstream() Function String to Double Conversion Using atof() Function You can use atof() function of C library that accepts the parameter of string value to convert the string into a double. Example In this example, we illustrate atof() to convert string into double. #include #include int main() { ... Read More
What's an Expression? In Python, an expression is any statement that evaluates to a value when executed.
Converting a for loop to a while loop in Python means rewriting the loop logic in a different way to perform the same task.While loop gives better control over conditions and is also useful for cases when the number of iterations is not fixed and depends on runtime values. Therefore, sometimes while is preferred over a for loop when the loop's continuation depends on dynamic conditions. For Loop Code Here is the following simple for loop that traverses over a range. for x in range(5): print(x) Output 0 1 2 3 4 To convert ... Read More
The term Whitespace in C++ refers to the characters used for formatting, like creating spaces, tabs, and newlines. These are usually invisible in the source code output (meaning they don't appear in the actual program output); they just help to format the code and improve readability. Types of whitespace characters Here are the following four common types of whitespace characters mostly used in C++. Space (' ') Tab ('\t') Newline ('') Carriage return ('\r') Space (' ') It's a most basic whitespace ... Read More
‘Ik onkar’ or ‘Ek Onkar’ is a very sacred mantra for Sikhs all over the world. It is a basic mantra or a devotional hymn offered to their Lord. Also known as the 'mool' mantra , it is said to be Guru Nanak's first teaching sermon.What Does It Mean?The literal translation of "ik onkar satnam karta poorak nirabhu niravair akal murat ajuni saibham gur prasad jap Aadh Sach jugaad sach hai bhee sach nanak hose bhee sach " is that there is only one god, whose name is 'Truth'. He is the creator and is without fear. He is without ... Read More
The Russian Peasant multiplication is used to multiply two numbers without using the multiplication operator. It involves constant use of halving and doubling the numbers. In this article, we have two integers, our task is to find the product of these two integers by implementing russian peasant multiplication in C++. Steps to Implement Russian Peasant Multiplication We will follow these simple steps to find the product using Russian Peasant multiplication: We have created a function russianPeasant() that accepts both the numbers (n and m) as arguments. Then we used a ... Read More
Sometimes, we need to parse a nested JSON object, which means an object inside another object. In this article, let's learn about how to parse a nested JSON object in Java. If you don't know about JSON, refer JSON overview. Parsing a Nested JSON Object in Java? We can achieve this using some of the popular Java libraries. Those are listed below: Using org.json library : We will use jsonObject.getJSONObject method to parse a nested JSON object. Using Gson library : We will use JsonParser.parseString(json).getAsJsonObject(). Using Jackson library : In this, We will use ObjectMapper.readTree(json) method. Now, ... Read More