Static Method Vs Instance Method

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Static Method: These methods are not belongs to class rather than object or instance and always call by the reference of class name. Class/Static method never calls instance methods and variables.

class TryCatch {

// Class/Static method implementation
public static int doSum(int a, int b) {

int sum = a + b;

return sum;

}

public static void main(String[] args) {

// Calling class/static method in same class.
doSum(2, 5);
}

}




public class TryCatchMain {

public static void main(String[] args) {

// Calling class/static method in other class.
TryCatch.doSum(2, 5);

}
}

Instance Method: These methods are part of instance or object and always calls by using refrence of same class. Instance methods can call a class/static method or valriable.


class TryCatch {

int i = 0;

//Class/Static method implementation
public static int doSum(int a, int b) {

int sum = a + b;

return sum;

}

public static void main(String[] args) {

//Calling class/static method in same class.
doSum(2, 5);
}

//Instance method implementation
public int doSum(int a, int b, int c) {

//Calling class/static method in instance method.
doSum(2, 5);

int sum = a + b;

return sum;

}
}