Accessing a Value in a Method Using *

Accessing a value in a method using *

It means "take and discard any number of parameters".

Both definitions are technically the same, but not giving a name to the argument array means you can't access it.

accessing the return value of a method in java

First, to get you going, positiveList.indexOf(positiveList.get(i)); returns i, think about what you do here.

What you obviously want is a list of arrays that fulfill a certain condition for a given list. Therefore, returning only a single int index is not the solution. Try to return a list of all indices, like in this example:

private static ArrayList<Integer> getIndex(List<Double> positiveList, double nvalues) {
    ArrayList<Integer> indices = new ArrayList<Integer>(); //something like this
    for(int i = 0; i < positiveList.size(); i++){
        if(positiveList.get(i)<=nvalues){
            indices.append(i); //add an index to the list
        }
    }
    return indices;
}

With this list, you can do whatever you want in your main method now.

Accessing value of object/instance of a class, made by using method from another class

You should create a class. Something like this:

 public class Character
 {
    private readonly string[] nameList = new string[]
    {
      "John",
      "Jack",
      "Josh",
    };

    public string Name { get; private set; }

    public Character()
    {
        Random randomGenerator = new Random();
        Name = nameList[randomGenerator.Next(0, nameList.Length - 1)];
    }

 }
   

In Main class instantiate a Character type and you can reach the object name with getter.

Accessing the value of a private variable in a method and making it global

var token;//now it is global, outside any class it the file

class _HomeState extends State<Home> {

    return Scaffold(
//...
      );
  }
   _oauth2() {
    setState(() {

     authenticate(values);

    });
  }

authenticate(...) async {
     login code

  token = tokenValue;//set the value here

return tokenValue;

}
}

Referencing a variable from another method

Usually you'd pass it as an argument, like so:

void Method1()
{
    var myString = "help";
    Method2(myString);
}

void Method2(string aString)
{
    var myString = "I need ";
    var anotherString = myString + aString;
}

However, the methods in your example are event listeners. You generally don't call them directly. (I suppose you can, but I've never found an instance where one should.) So in this particular case it would be more prudent to store the value in a common location within the class for the two methods to use. Something like this:

string StringA { get; set; }

public void button1_Click(object sender, EventArgs e)
{ 
   StringA = "help";
}

public void button2_Click(object sender, EventArgs e)
{
    string b = "I need ";
    string c = b + StringA;
}

Note, however, that this will behave very differently in ASP.NET. So if that's what you're using then you'll probably want to take it a step further. The reason it behaves differently is because the server-side is "stateless." So each button click coming from the client is going to result in an entirely new instance of the class. So having set that class-level member in the first button click event handler won't be reflected when using it in the second button click event handler.

In that case, you'll want to look into persisting state within a web application. Options include:

1. Page Values (hidden fields, for example)
2. Cookies
3. Session Variables
4. Application Variables
5. A Database
6. A Server-Side File
7. Some other means of persisting data on the server side, etc.

How to access an object in another method in C#?

Inside your class Game create a private Player user variable and instantiate inside your Setup() function.

Example how it would look:

class Game{
    private Player user;

    public void Setup(){
        user = new Player();
    }
}

then you have access to user.score inside the whole Game class

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