Assigning a Dynamic Name to a Variable in Java

I don't think you worked on Java with the code you wrote. Dynamic variables do not exist in Java. Variables in Java must be declared (*) on the source code.

You must use List or Map to process the tasks you want. For example, like this.

int n[] = new int[3];
for (int i = 0; i < 3; i++) {
    n[i] = 5;
}

List<Integer> n = new ArrayList<Integer>();
for (int i = 1; i < 4; i++) {
    n.add(5);
}

Map<String, Integer> n = new HashMap<String, Integer>();
for (int i = 1; i < 4; i++) {
    n.put("n" + i, 5);
}

*-The above description is slightly incorrect. If you use BCEL or ASM, you can declare variables within the byte code file. But don't use it because it's a bad way.