Why Am I Getting the 'Void Type Not Allowed Here' Error in Java?

Identifying the Cause of "Void Type Not Allowed Here" Error

When compiling Java code, you may encounter the error message "void type not allowed here." This error occurs when you attempt to assign a value to a variable or expression that expects a value of a different data type.

In the code provided in the question:

class obj {
    public static void printPoint(Point p) {
        System.out.println("(" + p.x + ", " + p.y + ")");
    }

    public static void main(String[] arg) {
        Point blank = new Point(3, 4);
        System.out.println(printPoint(blank));  // Error: Void type not allowed here
    }
}

The error occurs on the line where you try to assign the return value of the printPoint method to the println call. The printPoint method is declared as void, which means it does not return a value. Therefore, trying to assign its return value to the println call is invalid.

Error Explanation

The error message "void type not allowed here" indicates that the expected data type at a specific location in your code is not void. In this case, the code expects a value to be assigned to the println call, but the return value of the printPoint method is void.

Solution

To resolve this error, you need to remove the assignment line:

printPoint(blank);

The printPoint method will still be called and will print the coordinates of the blank point to the console, but its return value will not be assigned to any variable.

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