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Programming Articles
Page 2482 of 2547
How to determine the version of the C++ standard used by the compiler?
Sometimes we need to know that, what is the current C++ standard. To get this kind of information, we can use the macro called __cplusplus. For different standards, the value of this will be like below.Standard__cplusplus outputC++ pre C++981C++98199711LC++98 + TR1This cannot be checked, this will be marked as C++98C++11201103LC++14201402LC++17201703LExample#include int main() { if (__cplusplus == 201703L) std::cout
Read MoreHow to set font face, style, size and color for JTextPane text in Java
For background and foreground color of the JTextPane, use the following −JTextPane textPane = new JTextPane(); textPane.setBackground(Color.blue); textPane.setBackground(Color.green);For font face, style and size, use the Font class and set the font −Font font = new Font("Serif", Font.ITALIC, 18); textPane.setFont(font);The following is an example to set font, style and color for text in JTextPane −Examplepackage my; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Container; import java.awt.Font; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTextPane; import javax.swing.text.BadLocationException; import javax.swing.text.SimpleAttributeSet; import javax.swing.text.Style; import javax.swing.text.StyleConstants; import javax.swing.text.StyledDocument; public class SwingDemo { public static void main(String args[]) throws BadLocationException { JFrame frame = new JFrame("Demo"); ...
Read MoreHow to create a MySQL table based on JDBC Result Set?
The ResultSetMetadata class provides various methods that gives information about the current ResultSet object such as number of columns, name of the table, name of the column, datatype of the column etc…To prepare a CREATE query you need to get −Name of the table, using the getTableName() method.Column count, to iterate the columns using the getColumnCount() method.Name of the each column using the getColumnName() method.Data type of each column using the getColumnTypeName() method.Precision of each column using the getPrecision() method.ExampleLet us create a table with name customers in MySQL database using the CREATE query as shown below −CREATE TABLE Customers ...
Read MoreHow can I clear console using C++?
We can clear the console using C++ code. To do this we have to execute some system commands. In Linux systems, the POSIX is used. We can call system() function to execute system command. For clearing the console in linux, we can use “clear” command. This will be passed inside the system() function.Let us see the code to get the better idea.Example#include using namespace std; int main () { cout
Read MoreHow to add a Tab in JTabbedPane with Java?
Let us first create a JTabbedPane −JTabbedPane tabbedPane = new JTabbedPane();Create some panels −JPanel panel1, panel2, panel3, panel4, panel5; panel1 = new JPanel(); panel2 = new JPanel(); panel3 = new JPanel(); panel4 = new JPanel(); panel5 = new JPanel();Now, add tabs using the addTab() method and set the panels as well in which the tabs would be visible −tabbedPane.addTab("PHP", panel1); tabbedPane.addTab("Blockchain ", panel2); tabbedPane.addTab("Matlab", panel3); tabbedPane.addTab("JSP ", panel4); tabbedPane.addTab("Servlet", panel5);The following is an example to add a tab in JTabbedPane −package my; import javax.swing.*; import java.awt.*; public class SwingDemo { public static void main(String args[]) { ...
Read MoreHow can I create directory tree using C++ in Linux?
In this section we will see how to create a directory tree using C++ code in Linux. In Linux terminal we can put some command like “mkdir –p /dir/dir1/dir2” Here –p is used to mark as parent (recursively create inner directories).In C++ code we can use some libraries of Linux system. Then we can use Linux terminal commands as string argument of the system() function. We can create directory tree like this.Example#include #include #include #include using namespace std; int main() { int status; status = system("mkdir -p TP/My_Folder/test"); // Creating a directory if ...
Read MoreHow to specify tab location to make it visible in the bottom with Java?
Use the setTabPlacement() method to set the tab location. To make it visible in the bottom, use the BOTTOM constant −JTabbedPane tabbedPane = new JTabbedPane(); tabbedPane.setTabPlacement(JTabbedPane.BOTTOM);The following is an example to specify tab location to make it visible in the bottom −package my; import javax.swing.*; import java.awt.*; import java.awt.event.KeyEvent; public class SwingDemo { public static void main(String args[]) { JFrame frame = new JFrame("Technologies"); JTabbedPane tabbedPane = new JTabbedPane(); JPanel panel1, panel2, panel3, panel4, panel5; panel1 = new JPanel(); panel2 = new JPanel(); ...
Read MoreHow to create a high resolution timer with C++ and Linux?
To create high resolution timer we can use the chrono library. This library has high resolution clock. This can count in nanoseconds.In this program we will see the execution time in nanoseconds. We will take the time value at first, then another time value at the last, then find the difference to get elapsed time. Here we are using blank loop to pause the effect for sometimes.Example#include #include typedef std::chrono::high_resolution_clock Clock; main(){ auto start_time = Clock::now(); for(int i = 0; i
Read MoreHow to set horizontal gap between elements in a GridLayout with Java?
Use the setHgap() method to set the horizontal gap between elements in a GridLayout. Let’s say we have a GridLaypout −GridLayout layout = new GridLayout(2, 4);Set the horizontal gap −layout.setHgap(25);The following is an example −Examplepackage my; import java.awt.Color; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.Font; import java.awt.GridLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextArea; import javax.swing.WindowConstants; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame("Sections"); JPanel panel = new JPanel(); panel.setBackground(Color.blue); GridLayout layout = new GridLayout(2, 4); ...
Read MoreHow to set TabLayout Policy to JTabbedPane in Java when all the tabs does not fit in a single run
To set TabLayout Policy to JTabbedPane in Java when all the tabs does not fit in a single run, use the method setTabLayoutPolicy() −JTabbedPane tabbedPane = new JTabbedPane(); tabbedPane.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);Above we have set the constant to be SCROLL_TAB_LAYOUT, which is a tab layout policy for providing a subset of available tabs when all the tabs will not fit within a single run.The following is an example −package my; import javax.swing.*; import java.awt.*; import java.awt.event.KeyEvent; public class SwingDemo { public static void main(String args[]) { JFrame frame = new JFrame("Devices"); JTabbedPane tabbedPane = new JTabbedPane(); ...
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