For swapping characters of a string in Java we can use string builder which is mutable so we need not to take care of new object creation during swapping. In this we would create a method which swap characters of string based on location of swapping characters.This method will take ... Read More

Yes, the constructor should always have the same name as the class. Constructor looks like method but it is not. It does not have a return type and its name is same as the class name. Mostly it is used to instantiate the instance variables of a class. If the ... Read More

An abstract keyword is used to declare methods abstract methods and abstract classes. Once a method is declared abstract we should not specify body for those. Example public abstract class Sample{ public abstract demo(){ } } Error Sample.java:2: error: invalid method ... Read More

There doesn't seem to be any error in your syntax. Please verify if you declared the variables correctly. In case they are defined correctly, try the extended syntax check to see the error. The extended check can be done by going to PROGRAM => Check => Extended Syntax Check.

It is not because of a number of columns but the actual total size of the fields you are querying. It should not be more than 512 bytes.  For RFC communication, the types likes DATA or STANDARD table are not supported. So the RFC_READ_TABLE function module has to convert the ... Read More