Trade is a basic economic concept involving the buying and selling of goods and services, with compensation paid by a buyer to a seller, or the exchange of goods or services between parties. Trade can take place within an economy between producers and consumers. International trade allows countries to expand markets for both goods and services that… Continue reading What Is Trade?
Can we overload the methods by making them static?
No, We cannot overload the methods by just applying the static keyword to them(number of parameters and types are the same). Consider the following example. Output
Why is method overloading not possible by changing the return type in java?
In Java, method overloading is not possible by changing the return type of the program due to avoid the ambiguity. Output:
What is method overloading?
Method overloading is the polymorphism technique which allows us to create multiple methods with the same name but different signature. We can achieve method overloading in two ways. By Changing the number of arguments By Changing the data type of arguments Method overloading increases the readability of the program. Method overloading is performed to figure… Continue reading What is method overloading?
Can this keyword be used to refer static members?
Yes, It is possible to use this keyword to refer static members because this is just a reference variable which refers to the current class object. However, as we know that, it is unnecessary to access static variables through objects, therefore, it is not the best practice to use this to refer static members. Consider… Continue reading Can this keyword be used to refer static members?
Can we assign the reference to this variable?
No, this cannot be assigned to any value because it always points to the current class object and this is the final reference in Java. However, if we try to do so, the compiler error will be shown. Consider the following example. Output
What are the main uses of this keyword?
There are the following uses of this keyword. this can be used to refer to the current class instance variable. this can be used to invoke current class method (implicitly) this() can be used to invoke the current class constructor. this can be passed as an argument in the method call. this can be passed as an argument in the constructor call.… Continue reading What are the main uses of this keyword?
What is this keyword in java?
The this keyword is a reference variable that refers to the current object. There are the various uses of this keyword in Java. It can be used to refer to current class properties such as instance methods, variable, constructors, etc. It can also be passed as an argument into the methods or constructors. It can also be… Continue reading What is this keyword in java?
Why is the main method static?
Because the object is not required to call the static method. If we make the main method non-static, JVM will have to create its object first and then call main() method which will lead to the extra memory allocation.
What are the restrictions that are applied to the Java static methods?
Two main restrictions are applied to the static methods. The static method can not use non-static data member or call the non-static method directly. this and super cannot be used in static context as they are non-static.