Category: Java

How to copy array and increase size dynamically in Java ?

AbundantCode 5 months ago in Java 0

Below is a sample code snippet in Java demonstrating the steps to copy the array elements to a new array and increase the size dynamically. The program using the Arrays.copyOf method which lets the developers to create new array with a new size as well as copy the content of the old array to it at the same time. How to copy array and increase…

Java – How to check if a double value is Infinite ?

AbundantCode 5 months ago in Java 0

Problem Statement You need to find out if the given number of type double is Infinite or not. Solution Use the isInfinite method defined in the Double class to find of the given number is a infinite as shown below. The output of the above program is Abundantcode.com Java Tutorials true

Java – How to Convert Numbers to Objects and vice versa ?

AbundantCode 5 months ago in Java 0

Problem Statement You need convert numbers to objects and vice versa in your Java program. Solution There are times when you need to pass an object for a function where you have a numeric values. To convert numbers to objects and vice versa , you can use the corresponsing wrapper classes. For example , if you want to convert an int to Integer object or…

Java – How to use Packages to organize code ?

AbundantCode 5 months ago in Java 0

Problem Statement You need to use packages in java to organize your code. Solution Your Java program might the following Classes Interfaces Enums Other types There are times when your program might grow larger including th number of java classes used. You might want to organize these source files to that it is easier to maintain and avoid other issues like class name conflicts. Inorder…

Java – How to round floating point number to integer ?

AbundantCode 5 months ago in Java 0

Problem Statement You need to round the floating-point numbers to integers in Java. Solution When you cast a floating value to integer in Java , the value gets truncated. For example , the value 7.8989 when casted to integer will become 7. In order to round he floating-point numbers correctly , you can use the Math.round() method. The Math.round method has a 2 overloaded forms….

Java Compiler Error – ‘(‘ or ‘[‘ expected

AbundantCode 5 months ago in Java 1

What is the Java Compiler Error ? error: ‘(‘ or ‘[‘ expected Reason for the Error You will likely get this error when you have missed [] when declaring an array in Java. For example, the below code snippet results in the ‘(‘ or ‘[‘ expected error in Java. There are other reasons why you might this error too. For example, you have either missed…

Java Program to display "Hello, World!"

AbundantCode 5 months ago in Java 0

Problem Write a program in Java to display “Hello, World!” on the screen. Java Program to display “Hello, World!” in Console Window. This is a simple Java program that displays “Hello, World!” on the console window. Output Hello, World!

Java Program to copy range of elements from an array

AbundantCode 5 months ago in Java 0

The Java’s Arrays class provides a static function called Arrays.copyOfRange that helps the developers to copy a range of elements from one array to another. How to Copy range of elements from an array in Java ? Below is an example that demonstrates the copying of the range of objects from one array to another using Arrays.copyOfRange. Output Source Array ———— Java Abundantcode.com MCA Lab…