Call Overloaded Function in Java?

Question

How can I call the array function in Java?

Currently it looks like:

public static void WriteLine(Object Array[]) {
    for (int I = 0; I < Array.length; ++I) {
        Out.println(Array[I]);
    }
}

public static void WriteLine(Object Text) {
    Out.println(Text);
}

I also tried:

public static <T> void WriteLine(T Array[]) {
    for (int I = 0; I < Array.length; ++I) {
        Out.println(Array[I]);
    }
}

and in my main, I do:

int[] I = new int[]{1, 2, 3, 4, 5};
WriteLine(I);

I also tried:

WriteLine<int[]>(I);

Doesn't work..

It prints: [I@2f56f920

aka the address of the int Array. How can I call the specific array function explicitly or how can I make the compiler know which one to call automatically (implicitly)?

I'm not used to Java/Generics/Object yet.. Just moved from C++ and used to templates :(

Answer 1

An int is not an Object so an int[] is not an Object[]:

Integer[] I = new Integer[]{1, 2, 3, 4, 5};
WriteLine(I);

Or you should have WriteLine overloaded for all the primitive types:

public static void WriteLine(int Array[]) {
...
public static void WriteLine(long Array[]) {
...

Answer 2

I would go for

System.out.println(Arrays.toString(myArray));

Answer 3

I would name your array something other than "Array," as Java is confusing the Array class with the Object or T generic class. You may want to also consider using StringBuilder, if all you want is to print each element of your array.

public static void write(Object arr[]) {
    for (int i = 0; i < arr.length; ++i) {
        System.out.println(arr[i]);
    }
}

Should be good enough.

If you really want to use StringBuilder, and then print, do this:

public static void write(Object arr[]) {
    sb = new StringBuilder();
    for (int i = 0; i < arr.length; ++i) {
        sb.append(arr[i] + " ");
    }
    System.out.println(sb.toString());
}

Answer 4

array of primitive are subtype of java.lang.Object. Overloading is resolved at compile time and the most specific method is selected which in case is writeLine(Object text).

Answer 5

You have two options to make sure that the right function is called:

1-

Object[] objArray = new Object[] { 1, 2, 3, 4, 5 };

2-

Integer[] integerArray = new Integer[] { 1, 2, 3, 4, 5 };

On a side note, you should follow Java naming conventions. for example method name should be writeLine and the index variable in the loop should be small case