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Let say you want to know the number of days in a month, or we can say it as the last date of a month. The example below shows you how to obtain the number of days or the date. package org.kodejava.util; import java.util.Calendar; public class MonthDaysExample { public static void main(String[] args) { // […]
The java.lang.Math.random() method returns random number between 0.0 and 1.0 including 0.0 but not including 1.0. By multiplying Math.random() result with a number, for example 10 will give us a range of random number between 0.0 and 10.0. To get a random number between two numbers (n and m) we can use the formula of: […]
package org.kodejava.jdbc; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.Statement; public class JdbcQueryExample { // Database connection information private static final String URL = "jdbc:mysql://localhost/kodejava"; private static final String USERNAME = "kodejava"; private static final String PASSWORD = "s3cr*t"; public static void main(String[] args) { // Get a connection to database. try (Connection connection = [...
package org.kodejava.awt; import java.awt.*; public class ScreenSizeExample { public static void main(String[] args) { Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); System.out.println("Screen Width: " + screenSize.getWidth()); System.out.println("Screen Height: " + screenSize.getHeight()); } } The output of the code snippet above: Screen Width: 2560.0 Screen Height: 1080.0
To determine if an abstract pathname is a directory we can use the File.isDirectory() method. Here is an example code. package org.kodejava.io; import java.io.File; public class IsDirectoryExample { public static void main(String[] args) { // Creates a instance of File. File file = new File("C:/Users/wsaryada"); // Check if the abstract pathname is a directory by […]
package org.kodejava.io; import java.io.File; public class FreeSpaceExample { public static void main(String[] args) { // We create an instance of a File to represent a partition // of our file system. For instance here we used a drive D: // as in Windows operating system. File file = new File("D:"); // Using the getTotalSpace() we […]
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