in java, is it possble to name an array from a string?

I am a beginner with java, and I was wondering is if is possible to name and create an array from the value of a string.

Here is what I have:

public static void array(){

    createArray(array1, 100, 100);
}

    public static void createArray(String name, int r, int c) {
            int[][] name = new int[r][c];
}

I hope that explains itself. Thanks

EDIT: The code above does not work. I just want to know if it is possible to do what is above

EDIT2: As a beginner with java, I am just watching tutorials, and creating programs with what I learned to make sure I understand what is being taught. I first created a program which creates s multidimensional arrays. It then calls a method which assigned values to the array, (row+1)*(column+1). This makes a table much like a multiplication table. Then it displays the table to the screen.

After I created that 开发者_Go百科program, I wanted to be able to create arrays much like I assigned the values to it. So i asked this question...

Here is my code:

 public static void array(){
   int[][] array1 = new int[100][100];
   int[][] array2 = new int[20][20];

   setArrayValue(array1);
   setArrayValue(array2);
   drawArray(array1);
   System.out.println();
   drawArray(array2);
}  

public static void setArrayValue(int x[][]){
   for(int row = 0; row<x.length; row++){
       for(int column=0; column<x[row].length; column++){
           x[row][column]= (column+1)*(row+1);
        }
    }      
}

public static void drawArray(int x[][]){
    for(int row=0; row<x.length; row++) {
        for(int column=0; column<x[row].length;column++){
            System.out.print(x[row][column] + "\t");
        }
        System.out.println();
    }
}

Your concept doesn't make sense.

You might want to use a Map<String, int[][]>, which will map names to arrays.

What you are trying to do is not possible in Java. In the createArray method, name is of type String and cannot be redeclared as an int array.

Perhaps you are interested in a Map that uses String objects as keys? The values could be int arrays (or any other object).

No, you can't do that.

Variable names are not variable in Java.

Furthermore, local variables even lose their names when the code is compiled. Variable names are just a help for the programmer to distinguish between variables.

Nop can't be done. Variable names need to be known before hand.

No, it is not possible. You might be able to accomplish your task with a TreeMap or another Map implementation instead.

Instead of saying

 name = something;

You would say

  map.put(name, something);

Instead of

  name[0] + 7

You'd say

  map.get(name)[0] + 7

As stated by others - this cannot be done. That is because Java compiler needs to know exact name of a variable at the compile time. This is mandatory, since otherwise Java compiler wouldn't know which variable you are addressing, so it couldn't perform, for instance, type-safety checks.

However, if you just wish to stamp your variable with some unique ID, I guess the solution is closest to what has been stated by SLaks. Simply use Map, and You should be good. Example below.

Map<String, int[][]> myMap = new HashMap<String, int[][]>();
myMap.put("someUniqueName", new int[][] {{0,0}, {1,1}});

and later on:

int[][] array = myMap.get("someUniqueName");

Hope that helps achieve what You want.

Strictly: almost ;-) You can add a dynamic field in a class, which could be an array, using AOP. But...

It's difficult.

This solution is too complicated in most cases. You could probably solve your real problem in a much easier way.

Some advice: start with the beginning... and try using List (interface) / ArrayList as much as possible unless you have some pretty good reason to use an array.