Passing Variables into Methods- Java Passing Mechanism Explained
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Useful Post.
Nice to see the Syntax Highlighter on your blog. Makes the code snippets a lot readable.
Indeed great post and only thing which confused is how object is modified in Java. Here is one example which clears my doubt on Java pass by value and pass by reference
@Shreyas
Thanks!! I need to thank Balaji Rao for the input.
Regards,
Saurabh Patil
Good job, you provided some nice information
Yannick van den Bos,
Suggestions are always welcome.
Thanks!!
Thanks, i have been into java now for 4 months and here i am reminding myself time again on the Basics.
Hi I am having a bit of a problem. I am trying to create a scanner variable, convert it to a string with the .nextLine(); method, and then use a getter and setter methods to use those results in another class. I will post the code so you can see what I am doing. Any help would be much appreciated.
import java.util.Scanner;
public class Operation {
Scanner operation = new Scanner(System.in);
public void setOp(){
operation.nextLine();
String op = operation.nextLine();
}
public Scanner getOp(){
return op;
}
}
But I always get an error because it says that the variable op in my getOp method doesn’t exists.
The op variable being used in getOp() isn’t in the scope of getOp() method. you could be using the operation instance variable declared in the Operation class.
Moreover the ‘op’ variable declared in setOp() is of type String and its scope is limited to that of the setOp() method.
Try using ‘operation’ instead of ‘op’ in getOp().
Thank you for this post, really useful and simple to read.
Good Job!
Advice is truly timeless. I’m new to developing in Android, which, of course, is based on Java. You have no idea how many hours I have spent banging my head against the wall trying to figure out how changing a value inside of a method also changed the value outside of the scope of the method (I’m following along in a book and got stuck on a tutorial). This explains it (along with that link posted by Java Developer). Crystal clear now. Thanks.