feat: Implement binary to decimal conversion using Scanner.useRadix(2)

- Prompt user to input a binary number (comprising only 0s and 1s).
- Configured Scanner to interpret input using base-2 (`useRadix(2)`).
- Used `nextInt()` to parse the binary string into a decimal integer.
- Wrapped parsing logic in a try-catch block to handle InputMismatchException.
  - Displays an appropriate error message if non-binary input is entered.
- Used a `finally` block to ensure Scanner resource is properly closed.
- Included a comment with an example to explain the binary-to-decimal calculation.

Example:
  Input: 1010
  Output: Decimal value: 10

This commit demonstrates robust input handling and introduces a simple yet effective use of Java's radix-based parsing for binary number systems.

Signed-off-by: Somesh diwan <[email protected]>

Author: Someshdiwan

Section6StringClassPrinting/src/RadixMethod2.java

@@ -0,0 +1,20 @@
+import java.util.Scanner;
+
+public class RadixMethod2 {
+    public static void main(String args[]) throws Exception {
+        Scanner sc = new Scanner(System.in);
+        System.out.println("Enter a binary number (using only 0s and 1s):");
+        sc.useRadix(2);
+
+        try {
+            int x = sc.nextInt();
+            System.out.println("Decimal value: " + x);
+        } catch (java.util.InputMismatchException e) {
+            System.out.println("Error: Please enter a valid binary number (only 0s and 1s allowed)");
+        } finally {
+            sc.close();
+        }
+    }
+}
+
+/* for, example: "1010" in binary = (1×2³) + (0×2²) + (1×2¹) + (0×2⁰) = 8 + 0 + 2 + 0 = 10 in decimal */