Can Abstract Class have a Constructor in Java?
Tech Stack Journal
by Admin
1y ago
Yes. Abstract classes can also have constructors just like any other normal class. The advantage of declaring a constructor within an abstract class is that it can be called from any subclass constructor using the super keyword to reuse the initialization logic when the subclass is being instantiated. This way you can put common instantiation ... Read more The post Can Abstract Class have a Constructor in Java? appeared first on Tech Stack Journal ..read more
Visit website
Why the main method is public static void in Java?
Tech Stack Journal
by Admin
1y ago
If you have started learning Java and wondering why we have to type public static void for the main method, we’ve got you covered. In this post, we will discuss the significance of using public static void in front of the main method. In the main method, we use public static void because the Java ... Read more The post Why the main method is public static void in Java? appeared first on Tech Stack Journal ..read more
Visit website
Is Constructor Overriding Runtime Polymorphism in Java?
Tech Stack Journal
by Admin
1y ago
No, constructor overriding is not possible in Java, so whether it is runtime polymorphism or not is out of question. If you override a method of parent class in subclass and try to call that method using parent class reference variable, JVM decides which method to call at runtime. However, each class will have their […] The post Is Constructor Overriding Runtime Polymorphism in Java? appeared first on Tech Stack Journal ..read more
Visit website
Instance Variable vs Reference Variable in Java
Tech Stack Journal
by Admin
1y ago
In this post we’ll discuss the differences between Instance Variable and Reference Variable in Java, understand them with an example. In a nutshell, a reference variable is any variable that can hold reference of an object and an instance variable is a primitive or non-primitive variable that is declared within a class. Instance Variable Reference […] The post Instance Variable vs Reference Variable in Java appeared first on Tech Stack Journal ..read more
Visit website
C Program to Find Max and Min in 3D Array
Tech Stack Journal
by Admin
1y ago
In this example, we’ll write a C program to find maximum and minimum elements in a 3D array. Initially we’ve defined a 3 dimensional array with values We’ve also initialized the min and max variables with the first value the array We also declare 2 temporary variables to iterate over the array We use nested […] The post C Program to Find Max and Min in 3D Array appeared first on Tech Stack Journal ..read more
Visit website
Substring Based on a Character in Java
Tech Stack Journal
by Admin
1y ago
String class provides us with powerful String processing methods, out of those, substring is one. In this example, we’ll look into examples on substring based on a given character in Java. Unfortunately, String class doesn’t provide us with an out of box substring method to get a substring based on a character, however you can […] The post Substring Based on a Character in Java appeared first on Tech Stack Journal ..read more
Visit website
Private Final Variable in Java
Tech Stack Journal
by Admin
1y ago
A variable which is declared as private is not accessible outside of the class. That means you cannot access that private variable using a reference variable after instantiating the class. You can also declare a variable as private final in Java, then not only it will be accessible outside of the class, you will not […] The post Private Final Variable in Java appeared first on Tech Stack Journal ..read more
Visit website
Fix java.lang.UnsupportedClassVersionError in Eclipse
Tech Stack Journal
by Admin
1y ago
Usually people who’ve installed Eclipse newly receive this error. Let us understand the meaning of this Error. This error gets thrown when JVM tries to run a class file and finds that the JRE version is not within the min and max versions mentioned in the class file. But why this happens? It could be […] The post Fix java.lang.UnsupportedClassVersionError in Eclipse appeared first on Tech Stack Journal ..read more
Visit website
Integer methods getInteger vs parseInt vs valueOf with Examples
Tech Stack Journal
by Admin
1y ago
Integer class has three methods called as getInteger, parseInt and valueOf. Each of these methods solve a specific purpose. In this post, we’ll discuss the differences between them with examples. On a high-level below are the differences between these 3 methods. getInteger parseInt valueOf It determines the integer value of a given system property It […] The post Integer methods getInteger vs parseInt vs valueOf with Examples appeared first on Tech Stack Journal ..read more
Visit website
Fix Error: int Cannot Be Dereferenced
Tech Stack Journal
by Admin
1y ago
If you are getting “int cannot be dereferenced” error, it means that you are attempting to call a method or an attribute on a int type value. You should note that int is a primitive type and its variables do not store reference, they contain the actual value, so you cannot dereference using int primitive […] The post Fix Error: int Cannot Be Dereferenced appeared first on Tech Stack Journal ..read more
Visit website

Follow Tech Stack Journal on Feedspot

Continue with Google
OR